Alert archive / Texas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 511, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 12, 2011, 4:54 PM CDT for Clay County, Texas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2011, 4:54 PM CDT (21:54 UTC)
- Expired
- Aug 12, 2011, 6:00 PM CDT
- In force
- 66 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
County Clay County, TX
The radar
The Altus AFB radar (KFDR), 103 km from the middle of the area, began a volume at 21:58 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.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 9.9 hours before the alert went out and 128 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
- 1449 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1434 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -97 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
666
WUUS54 KOUN 122154
SVROUN
TXC077-122300-
/O.NEW.KOUN.SV.W.0511.110812T2154Z-110812T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
454 PM CDT FRI AUG 12 2011
THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN CLAY COUNTY IN NORTHERN TEXAS...
* UNTIL 600 PM CDT
* AT 454 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM 7 MILES NORTH OF BELLEVUE...MOVING NORTH AT 5 MPH.
ADDITIONAL SEVERE THUNDERSTORMS ARE LIKELY TO FORM SOUTH OF THE
FIRST STORM...AFFECTING AREAS FROM BLUEGROVE TO VASHTI.
HAZARDS IN THE WARNING INCLUDE...
DAMAGING WIND GUSTS TO 65 MPH...
HAIL UP TO THE SIZE OF QUARTERS...
* LOCATIONS IN THE WARNING INCLUDE BELLEVUE...BLUEGROVE...BUFFALO
SPRINGS...EXTREME EASTERN LAKE ARROWHEAD...HENRIETTA...JOY AND
VASHTI.
LAT...LON 3357 9829 3369 9833 3380 9833 3386 9819
3389 9797 3349 9798
TIME...MOT...LOC 2154Z 197DEG 6KT 3375 9801
$$
BURKE2 follow-up statements
883
WWUS54 KOUN 122234
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
534 PM CDT FRI AUG 12 2011
TXC077-122300-
/O.CON.KOUN.SV.W.0511.000000T0000Z-110812T2300Z/
CLAY TX-
534 PM CDT FRI AUG 12 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN CLAY COUNTY...
AT 534 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED SEVERE
THUNDERSTORMS ALONG A LINE EXTENDING FROM EASTERN LAKE ARROWHEAD TO 8
MILES NORTH OF BELLEVUE...MOVING EAST AT 5 MPH.
HAZARDS IN THE WARNING INCLUDE...
DAMAGING WIND GUSTS TO 65 MPH...
HAIL UP TO THE SIZE OF QUARTERS...
* LOCATIONS IN THE WARNING INCLUDE BELLEVUE...BLUEGROVE...BUFFALO
SPRINGS...EXTREME EASTERN LAKE ARROWHEAD...HENRIETTA...JOY AND
VASHTI.
LAT...LON 3357 9829 3369 9833 3380 9833 3386 9819
3389 9797 3349 9798
TIME...MOT...LOC 2234Z 277DEG 6KT 3372 9833 3375 9800
$$
BURKE721
WWUS54 KOUN 122300
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
600 PM CDT FRI AUG 12 2011
TXC077-122311-
/O.EXP.KOUN.SV.W.0511.000000T0000Z-110812T2300Z/
CLAY TX-
600 PM CDT FRI AUG 12 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CLAY COUNTY HAS
EXPIRED...
THE STORMS HAVE WEAKENED... BUT SMALL HAIL AND GUSTY WINDS MAY STILL
OCCUR.
LAT...LON 3357 9829 3369 9833 3380 9833 3386 9819
3389 9797 3349 9798
TIME...MOT...LOC 2234Z 277DEG 6KT 3372 9833 3375 9800
$$
BURKEThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:13 PM CDT | Special Weather Statement | OUN | Clay | 47 min |
| Aug 12, 3:49 PM CDT | Severe Thunderstorm Warning | OUN | Clay | 56 min |
| Aug 12, 4:49 PM CDT | Special Weather Statement | OUN | Clay | 41 min |
| Aug 12, 5:19 PM CDT | Areal Flood Advisory | OUN | Clay | 3 hr |
| Aug 12, 5:32 PM CDT | Special Weather Statement | OUN | Wichita | 43 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.