January 10, 2021 Winter Storm
A complex low pressure system moved across Southeast Texas on Sunday, January 10th bringing the first measurable snow to parts of the region in over three years. Generally around 4 to 6 inches of snow fell in portions of Burleson, Brazos, Madison, and Houston counties. A trace to 3 inches fell in portions of Washingston, Grimes, Walker, and Trinity Counties. The highest snow report received was 8.5 inches in northern Madison County just south of Normangee. A wintry mix of rain and sleet was reported as far south as the City of Houston and Sugarland.
Forecast
Photos
Radar
Dual Polarization radar data is vital is determining where rain, sleet, or snow is falling. It is hard to tell the difference where rain or snow is falling just using Base Reflectivity, but that distinction becomes much clearer when using Correlation Coefficient (CC). Correlation coefficient provides a measure of the consistency of the shapes and sizes of targets within the radar beam. A higher value shows a higher consistency in the size and shape of radar targets (the red color), while a lower value indicates greater variability in shapes and sizes (blues, greens, yellows). Where the radar is picking up all rain or all snow, then CC shows up red, but where there is mixing between the two precipitation types, CC turns yellow or green.
Storm Reports
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1221 PM CST MON JAN 11 2021 ...SNOWFALL REPORTS... LOCATION AMOUNT TIME/DATE LAT/LON ...TEXAS... ...AUSTIN COUNTY... BELLVILLE 6.5 NNE 0.5 IN 0700 AM 01/11 30.03N/96.22W BELLVILLE 0.4 NE 0.3 IN 0600 AM 01/11 29.95N/96.25W ...BRAZOS COUNTY... 4 ENE WIXON VALLEY 6.0 IN 0800 AM 01/11 30.78N/96.27W 6 ESE WIXON VALLEY 6.0 IN 0800 AM 01/11 30.72N/96.24W 2 E COLLEGE STATION 5.5 IN 0800 AM 01/11 30.59N/96.33W BRYAN 5.5 IN 0518 PM 01/10 30.67N/96.37W 3 NE BRYAN 4.5 IN 0430 PM 01/10 30.71N/96.34W 2 N COLLEGE STATION 4.5 IN 0430 PM 01/10 30.62N/96.36W BRYAN 3.5 NNW 4.0 IN 0800 AM 01/11 30.71N/96.39W 2 NNW UP403 4.0 IN 0500 PM 01/10 30.70N/96.49W 4 ESE BRYAN 3.8 IN 0500 PM 01/10 30.66N/96.31W ...BURLESON COUNTY... 6 NW CALDWELL 6.0 IN 1206 PM 01/11 30.60N/96.77W 1 E CALDWELL 5.8 IN 0545 PM 01/10 30.53N/96.68W SNOOK 5.0 IN 0520 PM 01/10 30.49N/96.47W ...GRIMES COUNTY... 3 NW IOLA 6.5 IN 0800 AM 01/11 30.81N/96.10W IOLA 4.8 IN 0417 PM 01/10 30.77N/96.07W IOLA 10.4 SSW 4.0 IN 0800 AM 01/11 30.63N/96.14W 9 NE NAVASOTA 2.5 IN 0800 AM 01/11 30.49N/95.99W 1 N NAVASOTA 2.0 IN 0635 PM 01/10 30.40N/96.09W ...HOUSTON COUNTY... LATEXO 6.5 IN 0800 AM 01/11 31.39N/95.47W 1 SSE CROCKETT 6.0 IN 1009 AM 01/11 31.30N/95.45W CROCKETT 6.0 IN 0849 PM 01/10 31.31N/95.46W 5 W GRAPELAND 5.0 IN 0800 AM 01/11 31.49N/95.57W GRAPELAND 4.0 IN 0519 PM 01/10 31.49N/95.48W 7 WSW CROCKETT 2.5 IN 0521 PM 01/10 31.29N/95.58W ...MADISON COUNTY... 13 WNW MADISONVILLE 8.5 IN 1203 PM 01/11 31.03N/96.11W MADISONVILLE 6.5 IN 0800 AM 01/11 30.95N/95.91W 5 ENE MADISONVILLE 6.0 IN 0800 AM 01/11 30.97N/95.83W 1 W MADISONVILLE 6.0 IN 0600 PM 01/10 30.95N/95.92W ...MONTGOMERY COUNTY... MONTGOMERY 5.6 ENE 0.5 IN 0700 AM 01/11 30.43N/95.62W 6 SE RICHARDS 0.5 IN 0500 PM 01/10 30.48N/95.76W THE WOODLANDS 4.6 NNW 0.1 IN 0700 AM 01/11 30.22N/95.53W ...POLK COUNTY... 1 WSW ONALASKA 1.5 IN 0800 AM 01/11 30.81N/95.12W ...TRINITY COUNTY... TRINITY 5.1 NW 4.5 IN 0700 AM 01/11 31.00N/95.42W GROVETON 2.3 IN 0510 PM 01/10 31.06N/95.13W TRINITY 3.7 E 1.5 IN 0700 AM 01/11 30.94N/95.31W ...WALKER COUNTY... HUNTSVILLE 11.5 WSW 3.4 IN 0700 AM 01/11 30.63N/95.71W HUNTSVILLE 4.8 NNW 2.8 IN 0600 AM 01/11 30.78N/95.58W 1 SE HUNTSVILLE 2.0 IN 0600 AM 01/11 30.71N/95.54W ...WASHINGTON COUNTY... BRENHAM 8.7 NW 2.5 IN 0700 AM 01/11 30.25N/96.51W BRENHAM 0.7 E 1.5 IN 0700 AM 01/11 30.16N/96.38W 1 NNW BRENHAM 1.3 IN 0800 AM 01/11 30.17N/96.40W BRENHAM 8.0 E 0.3 IN 0600 AM 01/11 30.16N/96.26W OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING EQUIPMENT AND EXPOSURES. WE THANK ALL VOLUNTEER WEATHER OBSERVERS FOR THEIR DEDICATION. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL.
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