Alert archive / Texas / Winter Storm Warnings in 2021
Winter Storm Warning 2, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this winter storm warning at Feb 11, 2021, 8:45 AM CST for 9 counties in Texas. It was in force for 15 hr. 19 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
- Feb 11, 2021, 8:45 AM CST (14:45 UTC)
- Expired
- Feb 11, 2021, 11:47 PM CST
- In force
- 15 hr
- Issued by
- NWS Austin/San Antonio, TX
Counties Blanco County, TX, Burnet County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Llano County, TX, Travis County, TX, Williamson County, TX
The radar
The Austin/San Antonio radar (KEWX), 93 km from the middle of the area, began a volume at 14:46 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 |
|---|---|---|---|
| Feb 11, 9:15 AM CST | SLEET 0.1 | Marble Falls, TX | EMERGENCY MANAGER IN MARBLE FALLS IS REPORTING ALL MAJOR ROADWAYS ARE NOW SHOWING ICE, WITH BOTH SLEET AND FREEZING RAIN. |
| Feb 11, 9:30 AM CST | FREEZING RAIN 0.1 | 9 Sse Llano, TX | PICTURES FROM A TRAINED WEATHER SPOTTER SHOWS ICE ACCUMULATION FROM FREEZING RAIN NEAR 0.10 INCHES ON TREES, VEHICLES, AND ELEVATED SURFACES. |
| Feb 11, 10:00 AM CST | FREEZING RAIN 0.01 | 1 Nne Tanglewood Forest, TX | TRAINED WEATHER SPOTTER REPORTS LIGHT ICE ACCUMULATIONS IN SOUTH AUSTIN AND NEAR DOWNTOWN AUSTIN, A FEW BLOCKS AWAY FROM THE CAPITOL. |
| Feb 11, 10:32 AM CST | FREEZING RAIN 0.05 | 3 Nne Lost Creek, TX | AMATEUR RADIO IS REPORTING JUST UNDER 1/16 OF AN INCH ICE ACCUMULATION ON ELEVATED SURFACES NEAR CITY PARK ROAD/PEARCE ROAD. |
| Feb 11, 10:45 AM CST | FREEZING RAIN 0.05 | 2 E Leander, TX | REPORT OF ICING OF THE HWY 183 BRIDGE AT CRYSTAL FALLS. |
| Feb 11, 10:47 AM CST | FREEZING RAIN 0.01 | 1 Wnw Mustang Ridge, TX | LIGHT ACCUMULATIONS OF ICE ON TREES AND ELEVATED SURFACE REPORTED VIA SOCIAL MEDIA. |
| Feb 11, 11:25 AM CST | FREEZING RAIN 0.01 | Burnet, TX | EMERGENCY MANAGER IS REPORTING FREEZING RAIN ONGOING WITH SOME ACCUMULATION NOTED. ROADS ARE GETTING WORSE. |
| Feb 11, 12:00 PM CST | FREEZING RAIN 0.05 | 1 Sw Crabapple, TX | LARGE, FALLEN TREE BRANCH DUE TO ICE ACCUMULATION. |
| Feb 11, 1:07 PM CST | FREEZING RAIN 0.4 | 4 W Leander, TX | MEASUREMENT WAS TAKEN ON TOP OF CAR AND TRASH CANS. SPOTTER ALSO REPORTED HEALTHY OAK TREE BRANCHES 4 INCHES IN DIAMETER BREAKING. |
| Feb 11, 2:00 PM CST | FREEZING RAIN 0.25 | Cedar Park, TX | THE CEDAR PARK EMERGENCY MANAGER REPORTS SEVERAL TREES DOWN DUE TO FREEZING RAIN AND ICE BUILD UP ON THE TREES AND BRANCHES. |
| Feb 11, 2:12 PM CST | FREEZING RAIN 0.25 | 3 Ene Mansfield Dam, TX | ONE QUARTER INCH OF ACCUMULATED ICE ON BRANCHES AND FENCES. NO ICE NOTED ON ROADWAYS. |
| Feb 11, 5:00 PM CST | FREEZING RAIN 0.25 | Austin, TX | BROADCAST MEDIA IS REPORTING THAT ROUGHLY 40K PEOPLE ARE WITHOUT POWER RIGHT NOW, INCLUDING THE AUSTIN AND SURROUNDING AREAS. THERE HAVE BEEN MANY REPORTS OF LIMBS AND TREES DOWN DUE TO THE WEIGHT OF ACCUMULATED ICE. |
| Feb 11, 5:00 PM CST | FREEZING RAIN 0.25 | Lago Vista, TX | SOCIAL MEDIA PHOTOS SHOW TREES DOWN IN LAGO VISTA DUE TO ICE ACCUMULATION. |
| Feb 11, 5:00 PM CST | FREEZING RAIN 0.5 | 9 Sse Llano, TX | PICTURES SHOW AT LEAST 0.5 INCHES OF ICE ACCUMULATION SOUTH OF LLANO. |
| Feb 11, 6:00 PM CST | FREEZING RAIN 0.6 | 6 Ne Bertram, TX | TRAINED SPOTTER REPORTED OVER A HALF INCH OF ICE ACCUMULATION NE OF BERTRAM WITH LARGE TREE LIMBS DOWN. |
| Feb 11, 6:00 PM CST | FREEZING RAIN 0.75 | 9 Sse Llano, TX | PICTURE FROM A TRAINED SPOTTER SHOWS 3/4 INCH OF ICE ACCUMULATION ON A DECK. |
| Feb 11, 6:30 PM CST | FREEZING RAIN 0.25 | 4 Sw Johnson City, TX | BLANCO COUNTY EMERGENCY MANAGER REPORTS LIMBS AND TREES DOWN DUE TO ICE ACCUMULATION. SOME LIGHT GLAZING ON THE ROADWAY CR3347. |
| Feb 11, 8:09 PM CST | FREEZING RAIN 0.5 | Brushy Creek, TX | SOCIAL MEDIA PICTURES SHOW SUBSTANTIAL TREE DAMAGE FROM HEAVY ICING IN AND AROUND THE BRUSHY CREEK AREA. |
| Feb 11, 8:24 PM CST | FREEZING RAIN 0.25 | Round Rock, TX | ROUND ROCK EMERGENCY MANAGER REPORTS TREES AND LIMBS DOWN DUE TO ICE FROM FREEZING RAIN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 2.8 hours before the alert went out and 236 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
- 12 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 412 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
486 WWUS44 KEWX 111445 WSWEWX URGENT - WINTER WEATHER MESSAGE National Weather Service Austin/San Antonio TX 845 AM CST Thu Feb 11 2021 ...Winter Storm Warning for portions of the the Hill Country in south central Texas... .The combination of an upper level disturbance and cold temperatures will allow for freezing rain through most of this evening. While some residents will see a very cold rain, some areas that drop to freezing in the Hill Country will start to see an accumulation of freezing rain on roadways and exposed surfaces. Residents are urged to use caution while driving today and be aware of possible ice and slick spots on area roads. TXZ171>173-184-186-188-120000- /O.UPG.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ /O.NEW.KEWX.WS.W.0002.210211T1445Z-210212T0600Z/ Llano-Burnet-Williamson-Edwards-Kerr-Gillespie- Including the cities of Llano, Burnet, Georgetown, Rocksprings, Kerrville, and Fredericksburg 845 AM CST Thu Feb 11 2021 ...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Significant icing. Ice accumulations up to one quarter of an inch. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Difficult travel conditions are possible. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ189-190-192-120000- /O.UPG.KEWX.WW.Y.0002.000000T0000Z-210211T2100Z/ /O.NEW.KEWX.WS.W.0002.210211T1445Z-210212T0600Z/ Kendall-Blanco-Travis- Including the cities of Boerne, Blanco, and Austin 845 AM CST Thu Feb 11 2021 ...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Significant icing. Ice accumulations up to one quarter of an inch. * WHERE...Kendall, Blanco and Travis Counties. * WHEN...Until midnight CST tonight. * IMPACTS...Difficult travel conditions are possible. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ185-187-193-194-206-208-120000- /O.EXB.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Real-Bandera-Bastrop-Lee-Comal-Caldwell- Including the cities of Leakey, Bandera, Bastrop, Giddings, New Braunfels, and Lockhart 845 AM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Light freezing rain and sleet. Ice accumulations around one tenth of an inch are possible in some spots. Some areas could see a light glaze on exposed surfaces. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Some impact to travel is possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ191-120000- /O.EXT.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Hays- Including the city of San Marcos 845 AM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Light freezing rain and sleet. Ice accumulations around one tenth of an inch are possible in some spots. Some areas could see a light glaze on exposed surfaces. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Some impact to travel is possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$
3 follow-up statements
253 WWUS44 KEWX 111706 WSWEWX URGENT - WINTER WEATHER MESSAGE National Weather Service Austin/San Antonio TX 1106 AM CST Thu Feb 11 2021 ...Winter Storm Warning for portions of the the Hill Country in south central Texas... .The combination of an upper level disturbance and cold temperatures will allow for freezing rain through most of this evening. While some residents will see a very cold rain, some areas that drop to freezing in the Hill Country will start to see an accumulation of freezing rain on roadways and exposed surfaces. Travel is discouraged for those in the Winter Storm Warning area. If travel is necessary, use caution and be aware of possible ice and slick spots on area roads. TXZ171>173-184-186-188>190-192-120115- /O.CON.KEWX.WS.W.0002.000000T0000Z-210212T0600Z/ Llano-Burnet-Williamson-Edwards-Kerr-Gillespie-Kendall-Blanco- Travis- Including the cities of Llano, Burnet, Georgetown, Rocksprings, Kerrville, Fredericksburg, Boerne, Blanco, and Austin 1106 AM CST Thu Feb 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Significant icing. Ice accumulations up to one quarter of an inch. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Difficult travel conditions are likely. The hazardous conditions will impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ183-205-207-120115- /O.EXA.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Val Verde-Bexar-Guadalupe- Including the cities of Del Rio, San Antonio, and Seguin 1106 AM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Light freezing rain and sleet. Ice accumulations up to one tenth of an inch are possible in some spots. Some areas could see a light glaze on exposed surfaces.. * WHERE...Val Verde, Bexar and Guadalupe Counties. * WHEN...Until midnight CST tonight. * IMPACTS...Some impact to travel is possible especially on bridges and less traveled roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ185-187-191-193-194-206-208-120115- /O.CON.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Real-Bandera-Hays-Bastrop-Lee-Comal-Caldwell- Including the cities of Leakey, Bandera, San Marcos, Bastrop, Giddings, New Braunfels, and Lockhart 1106 AM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Light freezing rain and sleet. Ice accumulations around one tenth of an inch are possible in some spots. Some areas could see a light glaze on exposed surfaces and elevated roadways. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Some impact to travel is possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$
837 WWUS44 KEWX 120041 WSWEWX URGENT - WINTER WEATHER MESSAGE National Weather Service Austin/San Antonio TX 641 PM CST Thu Feb 11 2021 ...WINTER WEATHER FOR MUCH OF THE NORTHERN HALF OF SOUTH CENTRAL TEXAS... .The upper level disturbance continues to move across Texas and cold temperatures at the surface will allow for freezing rain through the evening. Areas of rain are becoming more scattered and this trend will continue. Additional accumulation this evening will be a few hundredths of an inch or less. Temperatures will be nearly steady through the night, so any ice will remain. Travel is discouraged for those in the Winter Storm Warning area. If travel is necessary, use caution and be aware of possible ice and slick spots on area roads. TXZ171>173-184-186-188>190-192-120600- /O.CON.KEWX.WS.W.0002.000000T0000Z-210212T0600Z/ Llano-Burnet-Williamson-Edwards-Kerr-Gillespie-Kendall-Blanco- Travis- Including the cities of Llano, Burnet, Georgetown, Rocksprings, Kerrville, Fredericksburg, Boerne, Blanco, and Austin 641 PM CST Thu Feb 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Significant icing. Ice accumulations up to one quarter of an inch. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Difficult travel conditions are likely. The hazardous conditions will impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ183-185-187-191-193-194-205>208-120600- /O.CON.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Val Verde-Real-Bandera-Hays-Bastrop-Lee-Bexar-Comal-Guadalupe- Caldwell- Including the cities of Del Rio, Leakey, Bandera, San Marcos, Bastrop, Giddings, San Antonio, New Braunfels, Seguin, and Lockhart 641 PM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Light freezing rain and sleet. Ice accumulations around one tenth of an inch are possible in some spots. Some areas could see a light glaze on exposed surfaces and elevated roadways. * WHERE...Portions of south central Texas. * WHEN...Until midnight CST tonight. * IMPACTS...Some impact to travel is possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Prepare for possible power outages. The latest road conditions for the state can be obtained at drivetexas.org. && $$
936 WWUS44 KEWX 120547 WSWEWX URGENT - WINTER WEATHER MESSAGE National Weather Service Austin/San Antonio TX 1147 PM CST Thu Feb 11 2021 ...Icy Roadways are Possible into Friday Morning... .Some icy roadways, especially bridges and overpasses, still exist from Thursday's freezing rain and sleet. In addition, the upper level disturbance will still produce some patchy freezing rain or sleet through 3AM, with additional light ice accumulations possible. If travel is necessary, use extreme caution and be aware of possible ice and slick spots on area roads. Icy roadways will be hard to recognize overnight. Temperatures are forecast to climb above freezing mid to late morning Friday. TXZ171>173-184-186-188>190-192-121600- /O.CAN.KEWX.WS.W.0002.000000T0000Z-210212T0600Z/ /O.EXB.KEWX.WW.Y.0002.000000T0000Z-210212T1600Z/ Llano-Burnet-Williamson-Edwards-Kerr-Gillespie-Kendall-Blanco- Travis- Including the cities of Llano, Burnet, Georgetown, Rocksprings, Kerrville, Fredericksburg, Boerne, Blanco, and Austin 1147 PM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM CST FRIDAY... * WHAT...Some icy roadways, especially bridges and overpasses, still exist from Thursday's freezing rain and sleet. In addition, additional patchy freezing rain and sleet are possible through 3AM before precipitation ends. * WHERE...Portions of the southern Edwards Plateau, Hill Country, and I-35 corridor. * WHEN...Until 10 AM CST Friday. * IMPACTS...Some impacts to travel are possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Icy roadways will be hard to recognize overnight. The latest road conditions for the state can be obtained at drivetexas.org. && $$ TXZ205-207-120700- /O.CAN.KEWX.WW.Y.0002.000000T0000Z-210212T0600Z/ Bexar-Guadalupe- Including the cities of San Antonio and Seguin 1147 PM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Patchy light showers are possible over the next few hours, however temperatures will remain above freezing. $$ TXZ183-185-187-191-193-194-206-208-121600- /O.EXT.KEWX.WW.Y.0002.000000T0000Z-210212T1600Z/ Val Verde-Real-Bandera-Hays-Bastrop-Lee-Comal-Caldwell- Including the cities of Del Rio, Leakey, Bandera, San Marcos, Bastrop, Giddings, New Braunfels, and Lockhart 1147 PM CST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 10 AM CST FRIDAY... * WHAT...Some icy roadways, especially bridges and overpasses, still exist from Thursday's freezing rain and sleet. In addition, additional patchy freezing rain and sleet are possible through 3AM before precipitation ends. * WHERE...Portions of the southern Edwards Plateau, Hill Country, and I-35 corridor. * WHEN...Until 10 AM CST Friday. * IMPACTS...Some impacts to travel are possible especially on bridges and less traveled roads. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Icy roadways will be hard to recognize overnight. The latest road conditions for the state can be obtained at drivetexas.org. && $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 4:51 AM CST | Special Weather Statement | EWX | Dimmit | 39 min |
| Feb 11, 5:22 AM CST | Special Weather Statement | EWX | Zavala | 53 min |
| Feb 11, 6:39 AM CST | Special Weather Statement | EWX | Uvalde | 51 min |
| Feb 11, 6:55 AM CST | Severe Thunderstorm Warning | EWX | Bandera, Real, Uvalde | 39 min |
| Feb 11, 7:25 AM CST | Special Weather Statement | EWX | Uvalde | 50 min |
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.