Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 87, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 10, 2012, 8:26 PM CDT for Travis County, Williamson County, Texas. It was in force for 49 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 10, 2012, 8:26 PM CDT (01:26 UTC)
- Expired
- May 10, 2012, 9:15 PM CDT
- In force
- 49 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Travis County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 45 km from the middle of the area, began a volume at 01:30 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 |
|---|---|---|---|
| May 10, 8:30 PM CDT | HAIL 0.7 | 2 S Cedar Park, TX | DIME SIZE HAIL AND RAINFALL RATES TO 6 INCHES PER HOUR. |
| May 10, 8:35 PM CDT | TSTM WND DMG | 1 W Anderson Mill, TX | POWERLINES DOWN DUE TO FALLEN TREES. |
| May 10, 8:52 PM CDT | HAIL 0.88 | 2 Nw Windemere, TX | LOTS OF NICKEL SIZE HAIL NEAR IH35 CAUSING TRAFFIC PROBLEMS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 10, 7:50 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 1.4 hours before the alert went out and 259 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
- 2229 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
945 WUUS54 KEWX 110126 SVREWX TXC453-491-110215- /O.NEW.KEWX.SV.W.0087.120511T0126Z-120511T0215Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 826 PM CDT THU MAY 10 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN TRAVIS COUNTY... WESTERN WILLIAMSON COUNTY... * UNTIL 915 PM CDT. * AT 817 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LAGO VISTA...OR 7 MILES WEST OF ANDERSON MILL...AND MOVING NORTHEAST AT 45 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE CEDAR PARK...LEANDER... WINDEMERE...ROUND ROCK...GEORGETOWN DAM...GEORGETOWN...SUN CITY... SERENADA AND WEIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY MORNING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3076 9774 3065 9749 3015 9788 3037 9814 TIME...MOT...LOC 0125Z 219DEG 41KT 3049 9785 $$
2 follow-up statements
595 WWUS54 KEWX 110141 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 841 PM CDT THU MAY 10 2012 TXC453-491-110215- /O.CON.KEWX.SV.W.0087.000000T0000Z-120511T0215Z/ TRAVIS TX-WILLIAMSON TX- 841 PM CDT THU MAY 10 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR WESTERN WILLIAMSON AND WESTERN TRAVIS COUNTIES... AT 831 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM WITH VERY HEAVY RAIN CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CEDAR PARK...MOVING NORTHEAST AT 45 MPH. SOME LOCATIONS IN THE WARNING AREA INCLUDE GEORGETOWN DAM... GEORGETOWN...SUN CITY...SERENADA...JONAH AND WEIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... HAIL UP TO DIME SIZE HAS BEEN REPORTED NEAR CEDAR PARK WITH THIS STORM ALONG WITH VERY HEAVY RAINFALL. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY MORNING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3047 9797 3076 9774 3065 9749 3018 9786 TIME...MOT...LOC 0139Z 219DEG 41KT 3061 9773 $$
449 WWUS54 KEWX 110153 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 853 PM CDT THU MAY 10 2012 TXC453-491-110215- /O.CON.KEWX.SV.W.0087.000000T0000Z-120511T0215Z/ TRAVIS TX-WILLIAMSON TX- 853 PM CDT THU MAY 10 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR CENTRAL WILLIAMSON AND CENTRAL TRAVIS COUNTIES... AT 845 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING UP TO QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BRUSHY CREEK...OR NEAR ROUND ROCK...MOVING NORTHEAST AT 35 MPH. SOME LOCATIONS IN THE WARNING AREA INCLUDE GEORGETOWN...SERENADA... WEIR AND JONAH. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY MORNING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3047 9792 3073 9774 3065 9749 3018 9786 TIME...MOT...LOC 0153Z 246DEG 31KT 3051 9763 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:21 PM CDT | Tornado Warning | EWX | Dimmit, Frio, Zavala | 24 min |
| May 10, 7:59 PM CDT | River Flood Warning | EWX | Kerr | 18 hr |
| May 10, 8:02 PM CDT | Flash Flood Warning | EWX | Hays, Travis, Williamson | 118 min |
| May 10, 8:32 PM CDT | River Flood Warning | EWX | Val Verde | 30 hr |
| May 10, 8:34 PM CDT | Areal Flood Advisory | EWX | Bexar | 116 min |
| May 10, 9:10 PM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe, Hays | 3 hr |
| May 10, 9:59 PM CDT | Areal Flood Advisory | EWX | Bastrop, Caldwell, Comal, Guadalupe, Hays, Lee and 2 more | 2 hr |
| May 10, 10:42 PM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Guadalupe, Hays, Lee, Travis and 1 more | 4 hr |
| May 11, 12:06 AM CDT | Flash Flood Warning | EWX | Bexar, Comal | 3 hr |
| May 11, 2:37 AM CDT | Flash Flood Warning | EWX | Hays | 113 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012
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.