LOCAL CLIMATOLOGICAL DATA Monthly Summary December 2009 Station: Round Rock Latitude: 30° 32' 55" N Longitude: 97° 37' 34" W Elevation (ground): 709 feet Time Zone: Central +--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+ | | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind | Sun | | +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+ | | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak | Minute| Mean | | | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ | | | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | I | | D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | n | | a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | d | | t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | e | | e| m | m | e | n | t | n | g | g |8 smk, hz| r| v | w | x | n | n | d | d | r | d | r | d | r | x | | | | | | | | | | |9 blw snw| | | | | | | | | | | | | | | | 1| 2 | 3 | 4A | 4B | 5 | 6 | 7 | 8 | 9 |10| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18| 19| 20| 21| 22| 23 | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |01| 46.8 | 41.8 | 44.3 | 44.6 | 39| 82| 20| 0|1........| 0| 0.97| 0.0| 30.09| 29.62|29.831| 1.4| 1.0|338| 13|NNW| 7|303| 18 | |02| 48.6 | 39.6 | 44.1 | 43.7 | 38| 80| 20| 0|.........| 0| 0.00| 0.0| 30.09| 29.64|29.846| 3.7| 3.5|324| 22| NW| 12|330| 65 | |03| 48.5 | 33.1 | 40.8 | 40.6 | 28| 63| 24| 0|.........| 0| 0.00| 0.0| 30.29| 30.07|30.190| 1.3| 1.2| 36| 14| N| 5|321| 142 | |04| 40.8 | 25.7 | 33.3*| 35.5 | 21| 56| 31| 0|.........| 0| T | T | 30.40| 30.24|30.322| 1.7| 1.7| 45| 15|ENE| 6| 48| 77 | |05| 52.0 | 21.9*| 37.0 | 36.1 | 24| 64| 28| 0|.........| 0| 0.00| 0.0| 30.30| 30.05|30.185| 0.5| 0.5|230| 13| S| 4|225| 148 | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 51.0 | 35.6 | 43.3 | 43.8 | 41| 90| 21| 0|1........| 0| 0.10| 0.0| 30.06| 29.90|29.975| 0.1| 0.0| 84| 4| E| 1| 89| 35 | |07| 50.4 | 42.5 | 46.5 | 47.3 | 47| 100| 18| 0|.2.......| 0| 0.07| 0.0| 30.12| 29.94|30.030| 1.4| 1.4| 47| 13|NNE| 7| 43| 20 | |08| 56.3 | 42.1 | 49.2 | 48.3 | 48| 99| 16| 0|12.......| 0| 0.03| 0.0| 29.94| 29.57|29.722| 0.3| 0.2|292| 7|WNW| 4|326| 47 | |09| 49.5 | 30.1 | 39.8 | 38.1 | 26| 65| 25| 0|.........| 0| 0.01| 0.0| 30.13| 29.73|30.003| 1.5| 1.5| 44| 16|ENE| 8| 44| 136 | |10| 41.6 | 28.7 | 35.2 | 36.5 | 23| 59| 29| 0|.........| 0| 0.00| 0.0| 30.28| 30.13|30.201| 0.6| 0.6| 64| 10| E| 4| 86| 90 | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 46.7 | 40.1 | 43.4 | 43.3 | 34| 69| 21| 0|.........| 0| 0.00| 0.0| 30.27| 30.12|30.190| 0.3| 0.3| 72| 9|NNE| 2|103| 33 | |12| 50.4 | 42.5 | 46.5 | 46.0 | 45| 96| 18| 0|12.......| 0| 0.07| 0.0| 30.13| 29.98|30.055| 0.2| 0.2| 34| 7| NE| 2| 44| 34 | |13| 70.4 | 48.5 | 59.5 | 56.4 | 51| 85| 5| 0|12.......| 0| 0.01| 0.0| 30.09| 29.92|30.002| 0.3| 0.3|232| 7|WSW| 2|244| 138 | |14| 66.4 | 52.6 | 59.5 | 59.2 | 57| 94| 5| 0|1........| 0| 0.02| 0.0| 30.02| 29.89|29.951| 0.1| 0.1| 54| 7| NE| 3| 60| 45 | |15| 60.1 | 38.2 | 49.2 | 43.8 | 33| 67| 16| 0|.........| 0| 0.00| 0.0| 30.45| 30.01|30.264| 3.2| 3.2| 52| 17| E| 7| 44| 76 | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 47.7 | 35.5 | 41.6 | 41.9 | 31| 64| 23| 0|.........| 0| 0.00| 0.0| 30.45| 30.27|30.371| 1.0| 1.0| 38| 13| N| 4| 36| 67 | |17| 53.5 | 38.9 | 46.2 | 45.6 | 41| 83| 18| 0|1........| 0| 0.22| 0.0| 30.27| 30.04|30.145| 0.2| 0.2|351| 10| NW| 3|343| 60 | |18| 65.5 | 38.0 | 51.8 | 50.1 | 42| 77| 13| 0|.2.......| 0| 0.00| 0.0| 30.07| 29.96|30.019| 0.5| 0.3|342| 12| NW| 5|310| 138 | |19| 60.4 | 35.8 | 48.1 | 48.1 | 34| 60| 17| 0|.........| 0| 0.00| 0.0| 30.26| 30.06|30.172| 0.6| 0.6| 4| 13|WNW| 5|331| 116 | |20| 65.5 | 30.1 | 47.8 | 46.7 | 33| 62| 17| 0|.........| 0| 0.00| 0.0| 30.33| 30.19|30.249| 0.3| 0.3|224| 11| SW| 4|212| 142 | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 68.8 | 37.8 | 53.3 | 52.9 | 43| 70| 11| 0|.........| 0| 0.00| 0.0| 30.21| 29.98|30.117| 0.8| 0.8|226| 15|WSW| 6|226| 126 | |22| 71.3 | 53.5 | 62.4 | 62.0 | 57| 85| 2| 0|.........| 0| 0.00| 0.0| 29.98| 29.73|29.846| 1.4| 1.4|229| 15| SW| 7|229| 69 | |23| 76.0*| 55.9 | 65.9*| 65.9 | 60| 83| 0| 1|.........| 0| 0.00| 0.0| 29.76| 29.45|29.627| 1.7| 1.6|233| 24|WNW| 14|279| 67 | |24| 55.9 | 34.9 | 45.4 | 42.1 | 34| 72| 19| 0|........9| 0| 0.26| T | 30.03| 29.55|29.749| 9.1| 8.6|290| 37| NW| 21|321| 80 | |25| 51.7 | 27.9 | 39.8 | 38.4 | 14| 39| 25| 0|.........| 0| 0.00| 0.0| 30.14| 30.01|30.069| 1.8| 1.6|315| 22|NNW| 13|325| 152 | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 58.4 | 27.6 | 43.0 | 40.3 | 26| 58| 22| 0|.........| 0| 0.00| 0.0| 30.18| 30.02|30.084| 0.1| 0.1| 37| 6|NNW| 2|334| 127 | |27| 58.7 | 25.7 | 42.2 | 42.2 | 25| 55| 22| 0|.........| 0| 0.00| 0.0| 30.37| 30.17|30.242| 1.0| 1.0|321| 15| N| 8|325| 150 | |28| 52.3 | 29.4 | 40.8 | 39.7 | 28| 64| 24| 0|.........| 0| 0.00| 0.0| 30.55| 30.37|30.436| 0.3| 0.3| 41| 11|NNW| 4| 83| 140 | |29| 40.1 | 32.8 | 36.4 | 38.1 | 34| 86| 28| 0|...4.....| 0| 0.35| 0.0| 30.42| 30.19|30.327| 0.1| 0.1| 92| 9| E| 3|103| 26 | |30| 65.8 | 39.3 | 52.6 | 48.8 | 44| 86| 12| 0|.........| 0| 0.02| 0.0| 30.23| 29.96|30.072| 0.4| 0.3|238| 10|WNW| 4|263| 133 | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 72.8 | 38.5 | 55.7 | 50.2 | 42| 77| 9| 0|.........| 0| 0.00| 0.0| 30.41| 29.97|30.096| 1.7| 1.2| 20| 23|NNW| 11|326| 116 | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |1743.9|1144.6|------|------|---|----| 559| 1| Days | 2.13| T | 30.55| 29.45|30.077| 1.2| 0.6|333| 37| NW| 21|321| ---- | +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 56.3| 36.9| 46.6 | 45.7 | 37|74.0|----|----|≥.01 Inch 12|14.13| 0.0| 28 | 23 |------|----|----|---| 24 | 24 | 91| +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+-------+-------+------+ | | Season |Snow, Ice | | | | Number of Days | to Date |≥1.0 Inch 0| Greatest in 24 Hours and Dates | Greatest Depth on Ground | +------------------+-----------------+----+----+------------+--------------+-----------------+ of Snow, Ice Pellets or Ice | | Max Temperature | Min Temperature | 875|21042|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 5| 0.97| 1 | T | 4+ | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 0 | 9 | 0 |----|----| Clear 19 Partly Cloudy 2 Cloudy 10 | +--------+---------+--------+--------+----+----+------------------------------------------+ NOTES: Data in column 4A are (MAX+MIN) / 2, whereas data in columns 4B, 5, 6, 15, 16, 23 are means via continuous observations Units are: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches. for 24 hours. Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours. Columns 7, 8: Degree Days heating base is 65°F, cooling base is 65°F. Data in columns 9, 10, 12 are entered manually by the station observer. Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations. Column 23: Sunshine index is measured in Watts/m^2 and is continuously averaged for 24 hours. Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean.OBSERVATIONS AT 3-HOUR INTERVALS December 2009: Round Rock +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind | | | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | | H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | | o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | | u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | | r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 1 | DEC 2 | DEC 3 | | | | | |01| 0|30.05| 0.00| 47| 35| 64|02| 0| 3| 0|29.65| 0.00| 42| 41| 95|31| 2| 9| 0|30.07| 0.00| 39| 33| 78|32| 2| 5| |04| 0|29.97| 0.00| 46| 37| 72|04| 0| 2| 0|29.65| 0.00| 41| 40| 95|24| 0| 3| 0|30.10| 0.00| 36| 30| 81|03| 0| 3| |07| 0|29.92| 0.00| 46| 38| 73|05| 0| 4| 0|29.72| 0.00| 41| 40| 95|29| 3| 11| 0|30.17| 0.00| 33| 28| 81|34| 0| 3| |10| 70|29.88| 0.00| 47| 39| 74|03| 1| 4| 127|29.84| 0.00| 45| 38| 78|31| 7| 18| 429|30.24| 0.00| 43| 29| 58|04| 2| 10| |13| 33|29.78| 0.57| 44| 41| 89|02| 1| 5| 178|29.87| 0.00| 47| 37| 70|33| 6| 21| 613|30.18| 0.00| 48| 28| 45|05| 2| 7| |16| 16|29.73| 0.29| 43| 41| 94|06| 1| 6| 62|29.90| 0.00| 48| 38| 70|32| 6| 19| 70|30.19| 0.00| 46| 28| 50|04| 1| 7| |19| 0|29.73| 0.00| 43| 42| 96|26| 2| 7| 0|29.99| 0.00| 45| 36| 71|33| 4| 13| 0|30.23| 0.00| 42| 26| 54|05| 1| 6| |22| 0|29.70| 0.00| 42| 41| 96|32| 1| 9| 0|30.07| 0.00| 44| 34| 68|32| 6| 13| 0|30.28| 0.00| 40| 24| 53|04| 2| 9| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 4 | DEC 5 | DEC 6 | | | | | |01| 0|30.28| 0.00| 38| 24| 56|04| 1| 5| 0|30.30| 0.00| 25| 19| 79|05| 0| 0| 0|30.05| 0.00| 36| 28| 73|21| 0| 2| |04| 0|30.28| 0.00| 38| 24| 57|04| 3| 10| 0|30.27| 0.00| 24| 19| 83|26| 0| 0| 0|29.98| 0.00| 36| 29| 77|21| 0| 0| |07| 0|30.29| 0.00| 36| 21| 55|01| 1| 13| 0|30.27| 0.00| 22| 18| 85|26| 0| 0| 0|29.99| 0.00| 38| 34| 85|21| 0| 1| |10| 158|30.39| 0.00| 38| 21| 50|03| 3| 10| 436|30.27| 0.00| 42| 27| 57|23| 0| 4| 42|30.03| 0.00| 41| 40| 94|03| 0| 0| |13| 276|30.36| 0.00| 36| 24| 62|04| 3| 12| 657|30.16| 0.00| 50| 24| 36|24| 1| 6| 165|29.93| 0.00| 47| 46| 97|18| 0| 2| |16| 77|30.31| 0.00| 39| 21| 49|04| 2| 9| 91|30.08| 0.00| 48| 27| 44|17| 0| 7| 47|29.90| 0.00| 51| 50| 96|09| 1| 3| |19| 0|30.32| 0.00| 32| 19| 60|05| 0| 1| 0|30.08| 0.00| 41| 26| 55|27| 0| 6| 0|29.94| 0.00| 50| 50| 97|10| 0| 1| |22| 0|30.33| 0.00| 28| 19| 70|05| 0| 0| 0|30.07| 0.00| 37| 27| 66|22| 0| 2| 0|29.98| 0.00| 50| 50| 99|03| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 7 | DEC 8 | DEC 9 | | | | | |01| 0|29.99| 0.00| 50| 50|100|03| 0| 3| 0|29.90| 0.00| 42| 42|100|04| 0| 2| 0|29.75| 0.00| 48| 48| 99|04| 0| 0| |04| 0|30.01| 0.00| 50| 50|100|05| 0| 4| 0|29.82| 0.00| 42| 42|100|03| 0| 3| 0|29.84| 0.00| 45| 44| 97|04| 1| 13| |07| 0|30.07| 0.00| 50| 50|100|03| 3| 7| 0|29.74| 0.00| 42| 42|100|33| 0| 1| 0|29.98| 0.00| 31| 23| 72|03| 4| 14| |10| 51|30.11| 0.00| 49| 49|100|08| 0| 6| 156|29.74| 0.00| 45| 45|100|27| 0| 3| 392|30.11| 0.00| 35| 19| 53|05| 3| 11| |13| 67|30.03| 0.00| 48| 48|100|04| 3| 9| 193|29.63| 0.00| 50| 50|100|27| 0| 0| 538|30.04| 0.00| 42| 20| 41|05| 2| 10| |16| 19|30.02| 0.00| 46| 46|100|05| 3| 9| 128|29.58| 0.00| 56| 56| 99|21| 1| 4| 107|30.04| 0.00| 42| 20| 42|00| 1| 5| |19| 0|30.03| 0.00| 45| 45|100|04| 1| 5| 0|29.64| 0.00| 56| 56| 99|20| 0| 4| 0|30.09| 0.00| 34| 22| 62|03| 0| 1| |22| 0|29.99| 0.00| 43| 43|100|03| 1| 4| 0|29.72| 0.00| 52| 52| 99|24| 0| 0| 0|30.12| 0.00| 33| 22| 63|04| 0| 1| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 10 | DEC 11 | DEC 12 | | | | | |01| 0|30.13| 0.00| 32| 23| 69|04| 0| 5| 0|30.20| 0.00| 41| 30| 65|04| 0| 2| 0|30.13| 0.00| 44| 41| 90|04| 0| 2| |04| 0|30.13| 0.00| 31| 22| 68|05| 0| 2| 0|30.20| 0.00| 40| 30| 67|09| 0| 1| 0|30.08| 0.00| 43| 41| 93|05| 0| 3| |07| 0|30.19| 0.00| 29| 21| 72|02| 0| 2| 0|30.22| 0.00| 41| 30| 66|00| 0| 4| 0|30.08| 0.00| 43| 42| 97|04| 0| 3| |10| 408|30.27| 0.00| 37| 22| 54|08| 3| 10| 70|30.26| 0.00| 43| 31| 63|09| 1| 5| 46|30.11| 0.00| 44| 43| 99|03| 1| 4| |13| 244|30.21| 0.00| 40| 22| 49|07| 1| 5| 135|30.18| 0.00| 47| 34| 61|05| 0| 2| 144|30.02| 0.00| 47| 47|100|31| 0| 2| |16| 84|30.20| 0.00| 41| 25| 51|10| 1| 5| 25|30.16| 0.00| 46| 35| 67|04| 1| 5| 54|29.99| 0.00| 49| 48| 96|07| 0| 1| |19| 0|30.22| 0.00| 40| 25| 55|05| 0| 2| 0|30.17| 0.00| 46| 37| 72|03| 0| 3| 0|30.01| 0.00| 49| 47| 95|07| 0| 0| |22| 0|30.24| 0.00| 40| 27| 58|06| 0| 2| 0|30.15| 0.00| 44| 40| 85|07| 0| 2| 0|30.05| 0.00| 49| 48| 96|07| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 13 | DEC 14 | DEC 15 | | | | | |01| 0|30.05| 0.00| 50| 49| 99|22| 0| 3| 0|29.93| 0.00| 53| 52| 97|23| 0| 3| 0|30.03| 0.00| 53| 46| 77|05| 3| 10| |04| 0|30.03| 0.00| 50| 50|100|23| 0| 4| 0|29.93| 0.00| 53| 53| 99|22| 0| 1| 0|30.10| 0.00| 46| 37| 70|04| 5| 12| |07| 0|30.06| 0.00| 49| 49|100|23| 0| 3| 0|29.98| 0.00| 54| 54|100|22| 0| 0| 0|30.18| 0.00| 41| 30| 67|04| 4| 12| |10| 323|30.09| 0.00| 52| 52|100|23| 0| 1| 100|30.02| 0.00| 57| 57|100|22| 0| 0| 186|30.32| 0.00| 40| 29| 64|04| 4| 10| |13| 615|29.99| 0.00| 67| 53| 62|09| 0| 2| 107|29.95| 0.00| 65| 60| 83|11| 0| 1| 436|30.28| 0.00| 46| 32| 58|07| 2| 8| |16| 49|29.94| 0.00| 68| 53| 57|23| 0| 1| 46|29.90| 0.00| 66| 60| 83|10| 0| 0| 104|30.32| 0.00| 46| 34| 62|04| 4| 12| |19| 0|29.94| 0.00| 57| 50| 77|10| 0| 0| 0|29.94| 0.00| 63| 60| 90|10| 0| 0| 0|30.38| 0.00| 42| 33| 69|04| 3| 9| |22| 0|29.96| 0.00| 54| 52| 93|21| 1| 6| 0|29.98| 0.00| 62| 61| 95|02| 1| 5| 0|30.44| 0.00| 40| 29| 66|04| 1| 9| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 16 | DEC 17 | DEC 18 | | | | | |01| 0|30.43| 0.00| 39| 28| 66|03| 1| 6| 0|30.26| 0.00| 45| 37| 73|04| 1| 3| 0|30.02| 0.00| 38| 35| 89|34| 0| 0| |04| 0|30.42| 0.00| 37| 27| 67|02| 1| 10| 0|30.22| 0.00| 43| 39| 84|01| 0| 0| 0|30.00| 0.00| 44| 43| 95|25| 1| 5| |07| 0|30.44| 0.00| 36| 27| 71|06| 1| 9| 0|30.22| 0.08| 43| 40| 87|01| 0| 0| 0|30.02| 0.00| 42| 41| 97|26| 0| 0| |10| 218|30.44| 0.00| 40| 29| 66|04| 1| 9| 88|30.22| 0.00| 44| 42| 92|01| 0| 2| 385|30.06| 0.00| 51| 49| 91|32| 0| 6| |13| 218|30.35| 0.00| 46| 31| 57|03| 0| 6| 213|30.13| 0.00| 49| 47| 92|32| 1| 4| 608|29.99| 0.00| 63| 51| 64|02| 1| 6| |16| 63|30.33| 0.00| 47| 32| 56|05| 1| 5| 83|30.05| 0.00| 53| 44| 73|34| 0| 4| 40|29.98| 0.00| 64| 46| 52|03| 0| 5| |19| 0|30.30| 0.00| 45| 34| 64|02| 1| 2| 0|30.06| 0.00| 47| 41| 78|34| 0| 0| 0|30.03| 0.00| 52| 39| 61|02| 0| 1| |22| 0|30.31| 0.00| 45| 35| 67|05| 1| 4| 0|30.04| 0.00| 41| 37| 86|34| 0| 0| 0|30.06| 0.00| 46| 37| 70|03| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+MAXIMUM SHORT DURATION PRECIPITATION +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Precipitation | 0.07 | 0.10 | 0.10 | 0.12 | 0.15 | 0.20 | 0.25 | 0.32 | 0.36 | 0.42 | 0.52 | 0.62 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1208 | 1214 | 1214 | 1605 | 1618 | 1559 | 1620 | 1633 | 1646 | 1715 | 1814 | 1814 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ The precipitation amounts for the indicated time intervals may occur at any time during the month. The time indicated is the ending time of the interval. Date and time are not entered for trace amounts.OBSERVATIONS AT 3-HOUR INTERVALS December 2009: Round Rock +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind | | | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | | H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | | o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | | u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | | r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 19 | DEC 20 | DEC 21 | | | | | |01| 0|30.08| 0.00| 45| 36| 72|32| 0| 5| 0|30.26| 0.00| 34| 28| 79|33| 0| 0| 0|30.21| 0.00| 44| 34| 69|22| 0| 0| |04| 0|30.09| 0.00| 42| 36| 78|31| 0| 6| 0|30.26| 0.00| 32| 28| 85|33| 0| 1| 0|30.20| 0.00| 40| 33| 77|22| 0| 0| |07| 0|30.16| 0.00| 42| 35| 77|33| 0| 5| 0|30.29| 0.00| 30| 27| 86|33| 0| 0| 0|30.19| 0.00| 38| 34| 86|22| 0| 0| |10| 241|30.22| 0.00| 50| 36| 60|04| 1| 7| 397|30.32| 0.00| 50| 39| 64|21| 0| 3| 394|30.19| 0.00| 57| 43| 61|21| 2| 8| |13| 582|30.19| 0.00| 59| 35| 41|02| 2| 9| 617|30.23| 0.00| 63| 37| 37|22| 2| 7| 612|30.10| 0.00| 67| 45| 45|23| 2| 10| |16| 46|30.16| 0.00| 59| 30| 33|05| 2| 7| 39|30.20| 0.00| 63| 35| 36|22| 1| 6| 190|30.05| 0.00| 67| 49| 53|23| 2| 11| |19| 0|30.20| 0.00| 49| 31| 49|33| 0| 0| 0|30.22| 0.00| 53| 35| 51|21| 0| 3| 0|30.04| 0.00| 58| 48| 70|20| 0| 3| |22| 0|30.24| 0.00| 40| 31| 70|33| 0| 0| 0|30.22| 0.00| 47| 35| 61|21| 0| 0| 0|30.02| 0.00| 55| 51| 85|21| 1| 4| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 22 | DEC 23 | DEC 24 | | | | | |01| 0|29.96| 0.00| 54| 51| 90|22| 0| 4| 0|29.72| 0.00| 65| 62| 90|22| 1| 10| 0|29.58| 0.00| 53| 45| 73|27| 11| 24| |04| 0|29.92| 0.00| 55| 53| 94|22| 1| 3| 0|29.70| 0.00| 64| 62| 92|22| 2| 9| 0|29.59| 0.05| 47| 44| 89|30| 0| 4| |07| 0|29.91| 0.00| 56| 56| 98|22| 2| 7| 0|29.71| 0.00| 62| 60| 94|23| 1| 6| 0|29.61| 0.00| 44| 42| 93|22| 1| 6| |10| 91|29.93| 0.00| 60| 60|100|22| 2| 10| 70|29.72| 0.00| 65| 64| 96|22| 1| 9| 246|29.67| 0.00| 44| 39| 80|29| 13| 24| |13| 272|29.82| 0.00| 69| 58| 69|21| 5| 15| 158|29.61| 0.00| 72| 61| 70|21| 3| 13| 306|29.74| 0.00| 41| 29| 61|28| 17| 26| |16| 88|29.74| 0.00| 69| 58| 67|22| 2| 7| 195|29.54| 0.00| 74| 59| 61|21| 2| 9| 77|29.81| 0.00| 38| 26| 62|30| 14| 31| |19| 0|29.77| 0.00| 66| 58| 75|21| 1| 3| 0|29.55| 0.00| 64| 56| 75|21| 0| 0| 0|29.91| 0.00| 36| 24| 60|30| 8| 17| |22| 0|29.75| 0.00| 65| 61| 87|25| 3| 6| 0|29.48| 0.00| 63| 61| 92|21| 1| 6| 0|29.99| 0.00| 36| 20| 54|31| 7| 15| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 25 | DEC 26 | DEC 27 | | | | | |01| 0|30.04| 0.00| 34| 16| 47|32| 8| 16| 0|30.05| 0.00| 33| 19| 56|20| 0| 0| 0|30.17| 0.00| 35| 25| 69|05| 0| 1| |04| 0|30.08| 0.00| 31| 13| 47|33| 5| 17| 0|30.05| 0.00| 29| 19| 66|20| 0| 1| 0|30.18| 0.00| 31| 23| 71|33| 0| 0| |07| 0|30.10| 0.00| 29| 12| 50|29| 1| 4| 0|30.09| 0.00| 28| 21| 74|20| 0| 1| 0|30.24| 0.00| 26| 20| 80|33| 0| 0| |10| 406|30.14| 0.00| 42| 11| 28|33| 0| 5| 387|30.13| 0.00| 46| 28| 49|30| 0| 2| 397|30.29| 0.00| 47| 29| 49|27| 1| 5| |13| 638|30.06| 0.00| 48| 11| 22|11| 0| 2| 726|30.05| 0.00| 56| 31| 39|25| 1| 5| 628|30.22| 0.00| 58| 25| 28|28| 3| 10| |16| 156|30.02| 0.00| 49| 14| 24|24| 1| 6| 153|30.03| 0.00| 55| 34| 45|05| 1| 2| 148|30.20| 0.00| 57| 24| 28|32| 3| 10| |19| 0|30.05| 0.00| 40| 16| 38|20| 0| 0| 0|30.10| 0.00| 44| 30| 57|05| 0| 2| 0|30.26| 0.00| 45| 26| 47|07| 0| 1| |22| 0|30.06| 0.00| 36| 20| 51|20| 0| 0| 0|30.15| 0.00| 37| 27| 68|05| 0| 2| 0|30.33| 0.00| 41| 29| 63|35| 0| 2| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 28 | DEC 29 | DEC 30 | | | | | |01| 0|30.38| 0.00| 35| 27| 71|01| 0| 1| 0|30.42| 0.00| 33| 28| 80|03| 0| 0| 0|30.19| 0.00| 39| 38| 96|10| 0| 2| |04| 0|30.41| 0.00| 32| 25| 77|01| 0| 1| 0|30.37| 0.00| 37| 32| 85|03| 0| 1| 0|30.17| 0.00| 40| 40| 99|08| 0| 2| |07| 0|30.47| 0.00| 30| 25| 81|00| 0| 2| 0|30.38| 0.00| 38| 32| 80|03| 0| 3| 0|30.15| 0.00| 41| 41|100|31| 0| 0| |10| 396|30.55| 0.00| 42| 28| 58|05| 1| 3| 30|30.40| 0.00| 39| 33| 78|06| 0| 0| 301|30.13| 0.00| 47| 47|100|23| 0| 3| |13| 461|30.45| 0.00| 49| 28| 43|05| 2| 7| 125|30.32| 0.00| 39| 35| 87|08| 0| 2| 617|30.04| 0.00| 60| 48| 65|24| 3| 7| |16| 139|30.42| 0.00| 51| 29| 43|04| 0| 3| 39|30.25| 0.00| 40| 37| 90|11| 0| 0| 137|29.96| 0.00| 66| 49| 56|23| 1| 3| |19| 0|30.42| 0.00| 43| 29| 58|03| 0| 0| 0|30.26| 0.04| 40| 37| 92|11| 0| 1| 0|29.99| 0.00| 52| 47| 83|21| 1| 4| |22| 0|30.42| 0.00| 36| 27| 69|03| 0| 0| 0|30.27| 0.00| 39| 38| 94|11| 0| 1| 0|30.00| 0.00| 49| 46| 89|21| 0| 3| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 31 | | | | | | | |01| 0|29.98| 0.00| 44| 41| 90|21| 0| 0| | | |04| 0|29.98| 0.00| 41| 39| 93|21| 0| 0| | | |07| 0|30.01| 0.00| 39| 38| 94|21| 0| 0| | | |10| 380|30.05| 0.00| 56| 51| 85|06| 0| 1| | | |13| 380|29.99| 0.00| 70| 47| 44|21| 0| 6| | | |16| 209|30.04| 0.00| 65| 47| 52|35| 4| 12| | | |19| 0|30.24| 0.00| 47| 41| 79|06| 5| 11| | | |22| 0|30.38| 0.00| 43| 36| 77|00| 0| 13| | | +--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+WEATHER NOTES SUMMARY BY HOURS +--+-----------------------------+---------+ Wind Direction: Directions are those from which the wind is blowing, | | Averages | | indicated in tens of degrees from true North: i.e., 09 for East, 18 for | +----+------+---+---+---+-----+Resultant| South, 27 for West, and 00 or 36 for North. | | | | | | | | | Wind Speed: The observed one-minute average speed in miles-per-hour. | | | | T | | | | Wind | Wind Gust: The maximum instantaneous wind speed for the ten minute-period | | | | e | | % | W +----+----+ preceding the observation. | | | | m | D | | i | D | | Rainfall Rate: The instantaneous rainfall rate at time of observation, | | S | P | p | e | H | n | i | | calculated by timing consecutive 0.01" pulses from the electronic rain | | u | r | e | w | u | d | r | | gauge and interpolating this rate for one hour. | | n | e | r | | m | | e | | | | s | s | a | P | i | S | c | S | | H| h | s | t | o | d | p | t | p | | o| i | u | u | i | i | e | i | e | | u| n | r | r | n | t | e | o | e | | r| e | e | e | t | y | d | n | d | +--+----+------+---+---+---+-----+----+----+ |01| 0|30.067| 42| 36| 80| 1.0| 31 | 0.6| |04| 0|30.060| 41| 36| 83| 0.6| 01 | 0.3| |07| 0|30.087| 39| 35| 84| 0.7| 01 | 0.3| |10| 248|30.128| 47| 38| 75| 1.5| 34 | 0.6| |13| 373|30.057| 54| 39| 61| 2.0| 30 | 0.7| |16| 97|30.034| 54| 39| 60| 1.8| 34 | 1.0| |19| 0|30.079| 47| 38| 71| 1.1| 02 | 0.5| |22| 0|30.108| 44| 37| 77| 0.9| 33 | 0.5| +--+----+------+---+---+---+-----+----+----+HOURLY PRECIPITATION (Water Equivalent)December 2009: Round Rock ---+-----------------------------------------------------------+-----------------------------------------------------------+--- | | | D| A.M. Hour Ending at | P.M. Hour Ending at |D a| | |a t+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+t e| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |e ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- 01| | | | | | | | | | | | |0.16|0.09|0.06|0.20|0.17|0.18|0.10| |0.01| | | |01 02| | | | | | | | | | | | | | | | | | | | | | | | |02 03| | | | | | | | | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | | | | | |0.01|0.02|0.03|0.02|0.01| | | | | | | | | | | |0.01| |06 07| | | | | | | | | | | | | | |0.01|0.02| |0.01|0.01|0.01|0.01| | | |07 08| | | | | |0.02| | | | | | | | | | | | | |0.01| | | | |08 09| | |0.01| | | | | | | | | | | | | | | | | | | | | |09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | |0.03|0.01|0.02| | | | | | | | | | | | | | | | |0.01| | |12 13| | | | | | | | | | | |0.01| | | | | | | | | | | | |13 14| | | | | | | | | | | | | | | | | | | | | |0.01|0.01| |14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | | | | | |16 17|0.01|0.01|0.03| |0.01|0.02|0.04|0.05|0.03|0.01|0.01| | | | | | | | | | | | | |17 18| | | | | | | | | | | | | | | | | | | | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | | | | | | | | | | | | | | | | | | | |21 22| | | | | | | | | | | | | | | | | | | | | | | | |22 23| | | | | | | | | | | | | | | | | | | | | | | | |23 24| | |0.06|0.19|0.01| | | | | | | | | | | | | | | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | | | | | | | | | | | | | | | | | | | | | | |28 29| | | | | | | | | |0.01|0.07|0.07|0.03|0.05|0.02| | |0.02|0.02| |0.01|0.01| |0.04|29 30| | | | |0.01| | | | | | | |0.01| | | | | | | | | | | |30 31| | | | | | | | | | | | | | | | | | | | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum|0.01|0.01|0.13|0.20|0.05|0.04|0.05|0.07|0.06|0.04|0.09|0.08|0.20|0.14|0.09|0.22|0.17|0.21|0.13|0.02|0.03|0.03|0.02|0.04|Sum ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- During a frozen precipitation event, hourly precipitation totals may not be recorded. In this case, daily amounts are typically entered in the last column (hour ending at 12 A.M.)