Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 12, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this tornado warning at May 21, 2011, 8:27 PM CDT for Williamson County, Texas. It was in force for 33 min. 4 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 21, 2011, 8:27 PM CDT (01:27 UTC)
- Expired
- May 21, 2011, 9:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Williamson County, TX
The radar
The Ft Hood radar (KGRK), 42 km from the middle of the area, began a volume at 01:29 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 21, 8:53 PM CDT | FUNNEL CLOUD | 4 Ssw Florence, TX | FLORENCE FIRE DEPARTMENT OBSERVED FUNNEL CLOUD. |
| May 21, 8:57 PM CDT | TSTM WND DMG | Andice, TX | MINOR MOBILE HOME DAMAGE IN AND AROUND ANDICE AS WELL AS SOME FENCES BLOWN DOWN. |
| May 21, 9:00 PM CDT | TORNADO | 1 Sse Andice, TX | NWS DAMAGE SURVEY CONFIRMS A TORNADO TOUCHED DOWN ABOUT 1 MILE SOUTHEAST OF ANDICE. THE TORNADO TRACKED APPROXIMATELY 1.5 MILES TO THE NORTHEAST. DAMAGE CONSISTED OF MAINLY TREE DAMAGE...DAMAGE TO CARPORTS...MOBILE HOME ROOFS...DECKS...AND OUTDOOR EQUIPMENT. I |
| May 21, 9:04 PM CDT | FUNNEL CLOUD | Andice, TX | ROTATING WALL CLOUD OVER THE CITY OF ANDICE. |
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 21, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 1.5 hours before the alert went out and 232 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
- 3908 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 16.6
The text
As transmitted, in the capitals the NWS used until 2016.
666 WFUS54 KEWX 220127 TOREWX TXC491-220200- /O.NEW.KEWX.TO.W.0012.110522T0127Z-110522T0200Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 827 PM CDT SAT MAY 21 2011 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN WILLIAMSON COUNTY... * UNTIL 900 PM CDT. * AT 824 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ANDICE...OR ABOUT 11 MILES EAST OF BERTRAM...MOVING EAST AT 15 MPH. * RESIDENTS IN ANDICE SHOULD TAKE COVER NOW! PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER PROTECTION. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SATURDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3083 9772 3070 9776 3077 9796 3083 9792 TIME...MOT...LOC 0127Z 277DEG 12KT 3078 9787 $$
1 follow-up statement
094 WWUS54 KEWX 220147 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 847 PM CDT SAT MAY 21 2011 TXC491-220200- /O.CON.KEWX.TO.W.0012.000000T0000Z-110522T0200Z/ WILLIAMSON TX- 847 PM CDT SAT MAY 21 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHWESTERN WILLIAMSON COUNTY... AT 843 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A TORNADO. THIS TORNADO WAS LOCATED NEAR ANDICE...OR 11 MILES NORTHWEST OF SERENADA...MOVING EAST AT 10 MPH. PEOPLE LIVING NEAR ANDICE SHOULD TAKE COVER IMMEDIATELY! PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN A MOBILE HOME OR VEHICLE...GET OUT AND GO TO A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SATURDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3076 9792 3081 9787 3083 9772 3070 9776 TIME...MOT...LOC 0146Z 273DEG 11KT 3078 9784 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:10 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Travis, Williamson | 50 min |
| May 21, 7:27 PM CDT | Tornado Warning | EWX | Burnet, Williamson | 33 min |
| May 21, 7:44 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 46 min |
| May 21, 7:50 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 40 min |
| May 21, 7:59 PM CDT | Tornado Warning | EWX | Burnet, Williamson | 31 min |
| May 21, 8:08 PM CDT | Areal Flood Advisory | EWX | Burnet, Williamson | 112 min |
| May 21, 8:11 PM CDT | Tornado Warning | EWX | Burnet, Llano | 34 min |
| May 21, 8:27 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 48 min |
| May 21, 8:32 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 43 min |
| May 21, 8:44 PM CDT | Tornado Warning | EWX | Burnet | 31 min |
| May 21, 8:59 PM CDT | Tornado Warning | EWX | Williamson | 31 min |
| May 21, 9:14 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 46 min |
Nearby
Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes in 2011
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.