Alert archive / Texas / Winter Storm Warnings in 2021
Winter Storm Warning 1, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this winter storm warning at Jan 9, 2021, 2:34 PM CST for 10 counties in Texas. It took effect at Jan 10, 2021, 12:00 PM CST. It was in force for 12 hr. 34 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 9, 2021, 2:34 PM CST (20:34 UTC)
- In effect from
- Jan 10, 2021, 12:00 PM CST
- Expired
- Jan 10, 2021, 11:44 PM CST
- In force
- 12 hr
- Issued by
- NWS Houston/Galveston, TX
Counties Brazos County, TX, Burleson County, TX, Grimes County, TX, Houston County, TX, Madison County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 155 km from the middle of the area, began a volume at 20:32 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 10, 12:20 PM CST | SLEET 0.1 | 1 W Richards, TX | |
| Jan 10, 2:00 PM CST | SNOW 1 | 3 Nne College Station, TX | |
| Jan 10, 2:17 PM CST | SNOW 2 | Bryan, TX | |
| Jan 10, 2:30 PM CST | SNOW 2 | 4 Nne College Station, TX | |
| Jan 10, 2:35 PM CST | SNOW 2.3 | 1 S Iola, TX | |
| Jan 10, 2:40 PM CST | SNOW 1.5 | Bryan, TX | |
| Jan 10, 2:40 PM CST | SNOW 2 | Caldwell, TX | |
| Jan 10, 2:45 PM CST | SNOW 2.5 | 2 Wnw Up429, TX | |
| Jan 10, 2:45 PM CST | SNOW 3 | Bryan, TX | |
| Jan 10, 3:05 PM CST | SNOW 1.5 | 4 Ene College Station, TX | |
| Jan 10, 3:45 PM CST | SNOW 4 | 3 Nne College Station, TX | |
| Jan 10, 3:50 PM CST | SNOW 2 | Madisonville, TX | |
| Jan 10, 4:00 PM CST | SNOW 3 | 4 Ene College Station, TX | |
| Jan 10, 4:00 PM CST | SNOW 3.5 | 3 Se Bryan, TX | |
| Jan 10, 4:01 PM CST | SNOW 3.8 | Bryan, TX | |
| Jan 10, 4:17 PM CST | SNOW 4.8 | Iola, TX | |
| Jan 10, 4:30 PM CST | SNOW 0.1 | 2 Wnw Huntsville, TX | TRACE OF SNOW REPORTED IN HUNTSVILLE. |
| Jan 10, 4:30 PM CST | SNOW 4.5 | 2 N College Station, TX | |
| Jan 10, 4:30 PM CST | SNOW 4.5 | 3 Ne Bryan, TX | |
| Jan 10, 5:00 PM CST | SNOW 3.8 | 4 Ese Bryan, TX | |
| Jan 10, 5:00 PM CST | SNOW 4 | 2 Nnw Up403, TX | |
| Jan 10, 5:10 PM CST | SNOW 2.3 | Groveton, TX | |
| Jan 10, 5:18 PM CST | SNOW 5.5 | Bryan, TX | |
| Jan 10, 5:19 PM CST | SNOW 4 | Grapeland, TX | |
| Jan 10, 5:20 PM CST | SNOW 5 | Snook, TX | |
| Jan 10, 5:21 PM CST | SNOW 2.5 | 7 Wsw Crockett, TX | |
| Jan 10, 5:45 PM CST | SNOW 5.8 | 1 E Caldwell, TX | TREE BRANCH BROUGHT DOWN DUE TO SNOW LOAD. |
| Jan 10, 6:00 PM CST | SNOW 6 | 1 W Madisonville, TX | |
| Jan 10, 6:35 PM CST | SNOW 2 | 1 N Navasota, TX | |
| Jan 10, 8:49 PM CST | SNOW 6 | Crockett, TX | |
| Jan 10, 9:00 PM CST | SNOW 5.5 | 2 E College Station, TX | |
| Jan 10, 9:00 PM CST | SNOW 6 | 6 Nw Caldwell, TX | |
| Jan 10, 10:00 PM CST | SNOW 4.5 | 5 Nw Trinity, TX | |
| Jan 10, 11:00 PM CST | SNOW 3.4 | 9 Ne Richards, TX |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.6 hours before the alert went out and 253 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 802 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -98 m²/s²
- 0-3 km storm-relative helicity
- -37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
245 WWUS44 KHGX 092034 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 234 PM CST Sat Jan 9 2021 ...Accumulating snowfall possible north of the Houston metro area Sunday and Sunday night... TXZ163-164-176-177-195>198-101200- /O.UPG.KHGX.WS.A.0001.210110T1800Z-210111T1800Z/ /O.NEW.KHGX.WS.W.0001.210110T1800Z-210111T1200Z/ Houston-Trinity-Madison-Walker-Burleson-Brazos-Washington-Grimes- Including the cities of Crockett, Trinity, Groveton, Madisonville, Huntsville, Caldwell, Somerville, College Station, Bryan, Brenham, and Navasota 234 PM CST Sat Jan 9 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON SUNDAY TO 6 AM CST MONDAY... The National Weather Service in Houston/Galveston has issued a Winter Storm Warning for portions of Southeast Texas, which is in effect from noon Sunday to 6 AM CST Monday. The Winter Storm Watch is no longer in effect. * WHAT...Accumulating snow possible. Total snow accumulations of 1 to 4 inches possible with isolated higher amounts. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night lingering into early Monday morning. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. Only travel in an emergency. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. && $$ TXZ178-179-101200- /O.NEW.KHGX.WS.A.0002.210110T1800Z-210111T1200Z/ San Jacinto-Polk- Including the cities of Shepherd, Coldspring, Livingston, and Corrigan 234 PM CST Sat Jan 9 2021 ...WINTER STORM WATCH IN EFFECT FROM NOON SUNDAY TO 6 AM CST MONDAY... The National Weather Service in Houston/Galveston has issued a Winter Storm Watch, which is in effect from noon Sunday to 6 AM CST Monday. * WHAT...Accumulating snow possible, especially across the northern portions of the counties. Total snow accumulations of 1 to 4 inches possible with isolated higher amounts. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night lingering into early Monday morning. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
5 follow-up statements
165 WWUS44 KHGX 100451 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 1051 PM CST Sat Jan 9 2021 ...Accumulating snowfall possible north of the Houston metro area Sunday and Sunday night... TXZ163-164-176-177-195>198-101300- /O.CON.KHGX.WS.W.0001.210110T1800Z-210111T1200Z/ Brazos-Burleson-Grimes-Houston-Madison-Trinity-Walker-Washington- Including the cities of Brenham, Bryan, Caldwell, College Station, Crockett, Groveton, Huntsville, Madisonville, Navasota, Somerville, and Trinity 1051 PM CST Sat Jan 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON SUNDAY TO 6 AM CST MONDAY... * WHAT...Accumulating snow possible. Total snow accumulations of 1 to 4 inches possible with isolated higher amounts. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night lingering into early Monday morning. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. && $$ TXZ178-179-101300- /O.CON.KHGX.WS.A.0002.210110T1800Z-210111T1200Z/ Polk-San Jacinto- Including the cities of Coldspring, Corrigan, Livingston, and Shepherd 1051 PM CST Sat Jan 9 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE SUNDAY NIGHT... * WHAT...Accumulating snow possible across the northern portions of the counties. Total snow accumulations should range from very little or no accumulating snow in the southern parts of these counties to possibly as high as 4 inches with isolated higher amounts in the northernmost reaches of both counties. * WHERE...Polk and San Jacinto counties. * WHEN...Sunday afternoon and Sunday night lingering into early Monday morning. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
299 WWUS44 KHGX 101057 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 457 AM CST Sun Jan 10 2021 ...Accumulating snowfall possible north of the Houston metro area later today and tonight... TXZ178-179-111200- /O.UPG.KHGX.WS.A.0002.210110T1800Z-210111T1200Z/ /O.EXA.KHGX.WS.W.0001.210110T1800Z-210111T1200Z/ Polk-San Jacinto- Including the cities of Coldspring, Corrigan, Livingston, and Shepherd 457 AM CST Sun Jan 10 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO 6 AM CST MONDAY... * WHAT...Accumulating snow possible. Total snow accumulations of 2 to 4 inches...mainly across northern parts of the counties. Southern parts of the counties may see less. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ163-164-176-177-195>198-111200- /O.CON.KHGX.WS.W.0001.210110T1800Z-210111T1200Z/ Brazos-Burleson-Grimes-Houston-Madison-Trinity-Walker-Washington- Including the cities of Brenham, Bryan, Caldwell, College Station, Crockett, Groveton, Huntsville, Madisonville, Navasota, Somerville, and Trinity 457 AM CST Sun Jan 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 AM CST MONDAY... * WHAT...Accumulating snow possible. Total snow accumulations of 2 to 5 inches possible with isolated higher amounts. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ199-211-212-111200- /O.NEW.KHGX.WW.Y.0001.210110T1800Z-210111T1200Z/ Austin-Montgomery-Waller- Including the cities of Bellville, Brookshire, Conroe, Hempstead, Prairie View, Sealy, The Woodlands, and Waller 457 AM CST Sun Jan 10 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM CST MONDAY... * WHAT...Snow expected. Total snow accumulations less than two inches. * WHERE...Portions of Southeast Texas. * WHEN...Sunday afternoon and Sunday night. * IMPACTS...Hazardous travel conditions are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state can be obtained at drivetexas.org. && $$
612 WWUS44 KHGX 102058 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 258 PM CST Sun Jan 10 2021 ...Snowfall expected to accumulate north of the Houston metro area this afternoon through tonight... TXZ163-164-176>179-195>198-111200- /O.CON.KHGX.WS.W.0001.000000T0000Z-210111T1200Z/ Brazos-Burleson-Grimes-Houston-Madison-Polk-San Jacinto-Trinity- Walker-Washington- Including the cities of Brenham, Bryan, Caldwell, Coldspring, College Station, Corrigan, Crockett, Groveton, Huntsville, Livingston, Madisonville, Navasota, Shepherd, Somerville, and Trinity 258 PM CST Sun Jan 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... * WHAT...Accumulating snow expected. Total snow accumulations of 2 to 5 inches possible with locally higher amounts. * WHERE...Portions of Southeast Texas. * WHEN...This afternoon through tonight. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ199-211-212-111200- /O.CON.KHGX.WW.Y.0001.000000T0000Z-210111T1200Z/ Austin-Montgomery-Waller- Including the cities of Bellville, Brookshire, Conroe, Hempstead, Prairie View, Sealy, The Woodlands, and Waller 258 PM CST Sun Jan 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... * WHAT...Snow expected with accumulations less than two inches. * WHERE...Portions of Southeast Texas. * WHEN...This afternoon through tonight. * IMPACTS...Hazardous travel conditions are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state can be obtained at drivetexas.org. && $$
514 WWUS44 KHGX 110347 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 947 PM CST Sun Jan 10 2021 ...Winter Storm Slowly Winding Down West of Interstate 45... TXZ176-195>198-110500- /O.CAN.KHGX.WS.W.0001.000000T0000Z-210111T1200Z/ Brazos-Burleson-Grimes-Madison-Washington- Including the cities of Brenham, Bryan, Caldwell, College Station, Madisonville, Navasota, and Somerville 947 PM CST Sun Jan 10 2021 ...WINTER STORM WARNING IS CANCELLED... The National Weather Service in Houston/Galveston has cancelled the Winter Storm Warning. Snowfall has come to an end. However, drivers will still need to exercise caution overnight, as low temperatures around the freezing mark will mean icy spots may be present where roads are currently wet. Lightly trafficked roads will pose a greater threat. $$ TXZ211-212-110500- /O.CAN.KHGX.WW.Y.0001.000000T0000Z-210111T1200Z/ Austin-Waller- Including the cities of Bellville, Brookshire, Hempstead, Prairie View, Sealy, and Waller 947 PM CST Sun Jan 10 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The National Weather Service in Houston/Galveston has cancelled the Winter Weather Advisory. Snowfall has come to an end. However, drivers will still need to exercise caution overnight, as low temperatures around the freezing mark will mean icy spots may be present where roads are currently wet. Lightly trafficked roads will pose a greater threat. $$ TXZ163-164-177>179-111200- /O.CON.KHGX.WS.W.0001.000000T0000Z-210111T1200Z/ Houston-Polk-San Jacinto-Trinity-Walker- Including the cities of Coldspring, Corrigan, Crockett, Groveton, Huntsville, Livingston, Shepherd, and Trinity 947 PM CST Sun Jan 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... * WHAT...Snow continues in the warning area. Snow accumulations of 2 to 6 inches have fallen already with locally higher amounts. Light snowfall with up to an inch or so of further accumulation is possible. * WHERE...Houston, Polk, San Jacinto, Trinity, and Walker counties. * WHEN...Tonight. * IMPACTS...Travel could become hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous. If you must travel...keep an extra flashlight... food...and water in your vehicle in case of an emergency. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ199-111200- /O.CON.KHGX.WW.Y.0001.000000T0000Z-210111T1200Z/ Montgomery- Including the cities of Conroe and The Woodlands 947 PM CST Sun Jan 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST MONDAY... * WHAT...Snow gradually comes to an end with little to no additional accumulation. * WHERE...Montgomery County. * WHEN...This afternoon through tonight. * IMPACTS...Hazardous travel conditions are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state can be obtained at drivetexas.org. && $$
134 WWUS44 KHGX 110544 WSWHGX URGENT - WINTER WEATHER MESSAGE National Weather Service Houston/Galveston TX 1144 PM CST Sun Jan 10 2021 ...Winter Storm Winding Down Across Most of Southeast Texas... .Even though wintry precipitation is ending in the area, anyone traveling tonight into early Monday morning will want to exercise caution. With expected lows around or below freezing, any wet roads overnight could develop some slick spots. Bridges and elevated roads will carry the greatest threat for more hazardous road conditions. TXZ163-164-177>179-110645- /O.CAN.KHGX.WS.W.0001.000000T0000Z-210111T1200Z/ Houston-Polk-San Jacinto-Trinity-Walker- Including the cities of Coldspring, Corrigan, Crockett, Groveton, Huntsville, Livingston, Shepherd, and Trinity 1144 PM CST Sun Jan 10 2021 ...WINTER STORM WARNING IS CANCELLED... The National Weather Service in Houston/Galveston has cancelled the Winter Storm Warning. Snowfall has come to an end. However, drivers will still need to exercise caution overnight and early Monday morning, as low temperatures around the freezing mark will mean icy spots may be present where roads are currently wet. Lightly trafficked roads will pose a greater threat. $$ TXZ199-110645- /O.CAN.KHGX.WW.Y.0001.000000T0000Z-210111T1200Z/ Montgomery- Including the cities of Conroe and The Woodlands 1144 PM CST Sun Jan 10 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The National Weather Service in Houston/Galveston has cancelled the Winter Weather Advisory. Snowfall has come to an end. However, drivers will still need to exercise caution overnight and early Monday morning, as low temperatures around the freezing mark will mean icy spots may be present where roads are currently wet. Lightly trafficked roads will pose a greater threat. $$
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 9, 2:34 PM CST | Winter Storm Watch | HGX | Polk, San Jacinto | 14 hr |
| Jan 9, 3:28 PM CST | Gale Watch | HGX | 12 hr | |
| Jan 9, 3:28 PM CST | Small Craft Advisory | HGX | 49 hr |
Nearby
Winter Storm Warnings in Texas, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.