Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 14, NWS Norman, OK

February 25, 2013Foard County, Knox County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Feb 25, 2013, 12:30 AM CST for Foard County, Knox County, Texas. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 25, 2013, 12:30 AM CST (06:30 UTC)
Expired: Feb 25, 2013, 1:00 AM CST
In force: 30 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Foard County, TX, Knox County, TX

The radar

The Altus AFB radar (KFDR), 96 km from the middle of the area, began a volume at 06:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 24, 10:36 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 6.5 hours before the alert went out and 239 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 348 m²/s²
0-3 km storm-relative helicity: 493 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 24, 11:51 PM CST, 39 minutes earlier.

Area forecast discussion, Feb 24, 11:51 PM CST, 39 minutes before

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Hazardous weather outlook, Feb 24, 12:00 PM CST, 12 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CST SUN FEB 24 2013

OKZ004>048-050>052-TXZ083>090-251300-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1200 PM CST SUN FEB 24 2013

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT
ACROSS PORTIONS OF FAR SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA IS ALONG AND SOUTH OF A LINE FROM QUANAH...
TO FREDERICK...TO WAURIKA...AND INCLUDES ALL OF WESTERN NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM AROUND
6 PM THIS EVENING...THROUGH 2 AM MONDAY MORNING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS FROM LATE THIS
AFTERNOON UNTIL EARLY MONDAY MORNING.

IMPACTS...
HAIL TO THE SIZE OF QUARTERS TO HALF DOLLARS WILL BE POSSIBLE WITH
THE STRONGEST STORMS...ALONG WITH A FEW WIND GUSTS TO 60 MPH.

DISCUSSION...
A STRONG WINTER STORM SYSTEM WILL MOVE INTO THE SOUTHERN PLAINS TONIGHT.
AS A POTENT COLD FRONT SURGES SOUTHWARD THROUGH OKLAHOMA AND NORTH TEXAS...
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP. DESPITE MARGINAL LOW LEVEL
MOISTURE...WIND FIELDS WILL BE VERY FAVORABLE FOR SEVERE THUNDERSTORMS. ANY
THUNDERSTORMS THAT CAN TAP INTO THE STRONG UPPER LEVEL WINDS WILL BECOME
SEVERE...POSING A RISK OF LARGE HAIL AND DAMAGING WIND GUSTS. THE
SEVERE THREAT SHOULD DIMINISH OVERNIGHT AS THE STORMS PUSH
QUICKLY EAST AHEAD OF THE FRONT.

AS COLD AIR SURGES INTO NORTHERN AND WESTERN OKLAHOMA OVERNIGHT...AND MID
AND UPPER FORCING INCREASES...HEAVY SNOW WILL DEVELOP OVER NORTHWEST OKLAHOMA.
GIVEN THE STRENGTH OF THE UPPER LEVEL STORM SYSTEM...CONVECTIVE SNOW BANDS ARE
EXPECTED TO DEVELOP OVER PORTIONS OF NORTHERN AND WESTERN OKLAHOMA OVERNIGHT
INTO MONDAY MORNING. THE HEAVIEST BANDS WILL BE ACCOMPANIED BY
OCCASIONAL LIGHTNING...SNOWFALL RATES OVER 2 INCHES PER HOUR...AND
STRONG AND GUSTY WINDS. MODERATE TO HEAVY SNOW IS EXPECTED TO
PERSIST ACROSS NORTHERN AND WESTERN OKLAHOMA THROUGH MONDAY MORNING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CST MONDAY FEB 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...40 PERCENT.

OTHER HAZARDOUS WEATHER...
A SIGNIFICANT WINTER STORM WILL BEGIN TO IMPACT NORTHWEST OKLAHOMA LATE THIS
EVENING AND OVERNIGHT. A BLIZZARD WARNING IS IN EFFECT FOR THIS AREA. WINDS
OF 30 TO 40 MPH...WITH GUSTS TO 55 MPH WILL BE POSSIBLE...LOWERING VISIBILITIES
TO LESS THAN A QUARTER MILE AT TIMES. BLOWING A DRIFTING SNOW WILL MAKE TRAVEL
EXTREMELY DANGEROUS AND VIRTUALLY IMPOSSIBLE ON MANY ROADWAYS. PREPARE NOW FOR
CRIPPLING WINTER WEATHER CONDITIONS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
CONVECTIVE SNOWBANDS WILL REMAIN POSSIBLE THROUGH THE DAY ON MONDAY...AND AREAS
OF THUNDER SNOW MAY PERSIST WELL INTO THE AFTERNOON AND EVENING HOURS. BLIZZARD
CONDITIONS ARE EXPECTED TO CONTINUE OVER NORTHERN AND WESTERN OKLAHOMA...EXPANDING
EASTWARD THROUGH THE DAY. WIND GUSTS TO 55 MPH AND VISIBILITIES LESS THAN ONE
QUARTER MILE CAN BE EXPECTED WITH ANY THUNDER SNOW BANDS THAT DEVELOP. MODERATE
TO HEAVY SNOW WILL REMAIN POSSIBLE THROUGH MONDAY NIGHT...GRADUALLY TAPERING OFF
AS THE UPPER STORM SYSTEM EXITS TO THE EAST ON TUESDAY.

A PERIOD OF COOL AND DRY WEATHER WILL RESUME ON TUESDAY...LASTING INTO NEXT
WEEKEND.

OTHER HAZARDOUS WEATHER...
THE WINTER STORM WILL SLOWLY MOVE ACROSS OKLAHOMA AND NORTH TEXAS DURING THE DAY
ON MONDAY...TAPERING OFF FROM WEST TO EAST ON TUESDAY MORNING. A BLIZZARD WARNING
AND WINTER STORM WARNING WILL REMAIN IN EFFECT FOR MUCH OF NORTHERN...WESTERN...AND
CENTRAL OKLAHOMA. EXTREMELY DANGEROUS TRAVEL CONDITIONS CAN BE EXPECTED MONDAY AND
MONDAY NIGHT OVER THE WARNED AREA. EVEN AFTER SNOW CEASES LATE MONDAY NIGHT INTO
TUESDAY MORNING...SIGNIFICANT SNOW ACCUMULATIONS AND DRIFTING SNOW WILL MAKE TRAVEL
NEARLY IMPOSSIBLE IN MANY AREAS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM MONDAY WITH
UPDATES AS NEEDED.

AUSTIN

In the hours before

Local storm report, Feb 24, 8:46 PM CST, 3 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
846 PM CST SUN FEB 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     TSTM WND GST     3 SE HOBART             35.00N 99.05W
02/24/2013  M66 MPH          KIOWA              OK   ASOS

0835 PM     TSTM WND GST     4 SE HOBART             34.99N 99.04W
02/24/2013  M68 MPH          KIOWA              OK   MESONET

&&

JPIKE

Special weather statement, Feb 24, 9:30 PM CST, 3 hours before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
930 PM CST SUN FEB 24 2013

OKZ023-027-034>039-044-TXZ083>090-250400-
COMANCHE OK-GREER OK-COTTON OK-KIOWA OK-CADDO OK-GRADY OK-TILLMAN OK-
JACKSON OK-STEPHENS OK-BAYLOR TX-ARCHER TX-KNOX TX-WICHITA TX-
WILBARGER TX-HARDEMAN TX-CLAY TX-FOARD TX-
930 PM CST SUN FEB 24 2013

...SIGNIFICANT WEATHER ADVISORY FOR COMANCHE...SOUTHEASTERN GREER...
COTTON...KIOWA...SOUTHERN CADDO...SOUTHWESTERN GRADY...TILLMAN...
JACKSON...NORTHWESTERN STEPHENS...NORTHERN BAYLOR...NORTHERN
ARCHER...NORTHERN KNOX...WICHITA...WILBARGER...SOUTHEASTERN
HARDEMAN...NORTHWESTERN CLAY AND FOARD COUNTIES UNTIL 1000 PM CST...

AT 923 PM CST...THE LEADING EDGE OF STRONG AND GUSTY THUNDERSTORM
WINDS FROM A COMPLEX OF THUNDERSTORMS EXTENDED FROM NEAR
CORDELL...SOUTHWESTWARD TO NEAR FREDERICK IN SOUTHWEST
OKLAHOMA...AND CROWELL IN WESTERN NORTH TEXAS. THE CLUSTER OF STORMS
WILL GENERALLY MOVE EASTWARD AT 25 TO 30 MPH...WHILE INDIVIDUAL
STORMS MOVE NORTHEASTWARD AT AROUND 45 MPH. HEAVIER CORES MAY
CONTAIN HAIL.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3506 9936 3510 9789 3376 9852 3377 10000
TIME...MOT...LOC 0323Z 219DEG 28KT 3387 9976

AUSTIN

Special weather statement, Feb 24, 10:04 PM CST, 2 hours 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1004 PM CST SUN FEB 24 2013

OKZ023-034>038-TXZ083>088-250445-
GREER OK-KIOWA OK-CADDO OK-TILLMAN OK-JACKSON OK-COMANCHE OK-
BAYLOR TX-WICHITA TX-WILBARGER TX-HARDEMAN TX-FOARD TX-KNOX TX-
1004 PM CST SUN FEB 24 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GREER...SOUTHERN
KIOWA...SOUTHWESTERN CADDO...TILLMAN...JACKSON...WESTERN COMANCHE...
NORTHWESTERN BAYLOR...NORTHWESTERN WICHITA...WILBARGER...HARDEMAN...
FOARD AND NORTHWESTERN KNOX COUNTIES UNTIL 1045 PM CST...

AT 956 PM CST...A LARGE ARE OF THUNDERSTORM ACTIVITY EXTENDED FROM
NEAR SNYDER TO FREDERICK IN SOUTHWEST OKLAHOMA...SOUTHWESTWARD TO
CROWELL IN WESTERN NORTH TEXAS. THIS AREA OF THUNDERSTORM ACTIVITY
WILL MOVE EAST AT 20 TO 25 MPH...WHILE INDIVIDUAL STORMS MOVE
NORTHEASTWARD AT 30 TO 40 MPH. BRIEF GUSTY WINDS AND HAIL CAN BE
EXPECTED WITHIN THE STRONGER THUNDERSTORM CORES. LOCALIZED HEAVY
RAIN WILL ALSO BE POSSIBLE IN THESE AREAS.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
ALTUS...VERNON...QUANAH...FREDERICK...CACHE...SNYDER...CROWELL...
TIPTON...BLAIR...MEDICINE MOUND...CHILLICOTHE...OLUSTEE...ELDORADO...
MOUNTAIN PARK...DAVIDSON...INDIAHOMA...MEDICINE PARK...DUKE...
ROOSEVELT AND MANITOU.

LAT...LON 3388 10003 3496 9944 3497 9835 3380 9907
      3377 10000
TIME...MOT...LOC 0356Z 221DEG 24KT 3439 9927

AUSTIN

Special weather statement, Feb 24, 10:48 PM CST, 1 hour 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1048 PM CST SUN FEB 24 2013

OKZ023-034>038-TXZ083>088-250530-
GREER OK-KIOWA OK-CADDO OK-TILLMAN OK-JACKSON OK-COMANCHE OK-
BAYLOR TX-WICHITA TX-WILBARGER TX-HARDEMAN TX-FOARD TX-KNOX TX-
1048 PM CST SUN FEB 24 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GREER...SOUTHERN
KIOWA...SOUTHWESTERN CADDO...TILLMAN...JACKSON...NORTHWESTERN
COMANCHE...NORTHWESTERN BAYLOR...NORTHWESTERN WICHITA...WILBARGER...
SOUTHEASTERN HARDEMAN...FOARD AND KNOX COUNTIES UNTIL 1130 PM CST...

AT 1042 PM CST...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 11
MILES SOUTHEAST OF GUTHRIE TEXAS...NORTHEASTWARD TO NEAR
CROWELL...AND FREDERICK AND SNYDER IN SOUTHWEST OKLAHOMA. THIS LINE
WAS MOVING EASTWARD AT AROUND 15 TO 20 MPH...WHILE INDIVIDUAL
THUNDERSTORMS WITHIN THE LINE MOVED NORTHEAST AT AROUND 45 MPH.
STRONGER CELLS WITHIN THIS LINE WILL BE CAPABLE OF BRIEF STRONG WIND
GUSTS AND SUB SEVERE HAIL.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...
LOCALLY HEAVY RAINFALL.

LOCATIONS IMPACTED INCLUDE...
ALTUS...VERNON...FREDERICK...CACHE...MUNDAY...SNYDER...KNOX CITY...
CROWELL...TIPTON...BLAIR...MEDICINE MOUND...CHILLICOTHE...OLUSTEE...
MOUNTAIN PARK...DAVIDSON...INDIAHOMA...MEDICINE PARK...GOREE...
ROOSEVELT AND MANITOU.

LAT...LON 3498 9926 3494 9835 3341 9944 3342 9999
      3383 10000 3384 10003
TIME...MOT...LOC 0442Z 235DEG 37KT 3351 10017

AUSTIN

Special weather statement, Feb 24, 11:31 PM CST, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1131 PM CST SUN FEB 24 2013

OKZ035>038-TXZ083>088-250615-
KIOWA OK-TILLMAN OK-JACKSON OK-COMANCHE OK-BAYLOR TX-WICHITA TX-
WILBARGER TX-HARDEMAN TX-FOARD TX-KNOX TX-
1131 PM CST SUN FEB 24 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL KIOWA...TILLMAN...
SOUTHEASTERN JACKSON...SOUTHWESTERN COMANCHE...NORTHWESTERN BAYLOR...
NORTHWESTERN WICHITA...WILBARGER...SOUTHEASTERN HARDEMAN...
SOUTHEASTERN FOARD AND KNOX COUNTIES UNTIL 1215 AM CST...

AT 1123 PM CST...A LINE OF SHOWERS AND EMBEDDED STRONG THUNDERSTORMS
EXTENDED FROM NEAR BENJAMIN AND KNOX CITY IN WESTERN NORTH
TEXAS...NORTHWESTWARD TO VERNON AND FREDERICK. THIS AREA OF SHOWERS
AND STORMS WAS MOVING EASTWARD AT AROUND 15 TO 20 MPH...WHILE INDIVIDUAL
STORMS WERE MOVING NORTHEASTWARD AT AROUND 40 MPH. REPORTS OF SUB SEVERE
HAIL HAVE BEEN RECEIVED NEAR VERNON AND KNOX CITY. HAIL AND STRONG WINDS
WILL REMAIN POSSIBLE WITH ANY OF THE STRONGER STORMS WITHIN THE COMPLEX.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...
LOCALLY HEAVY RAINFALL WHICH MAY LEAD TO FLOODING OF LOW LYING AREAS...

LOCATIONS IMPACTED INCLUDE...
VERNON...SEYMOUR...FREDERICK...CACHE...MUNDAY...KNOX CITY...TIPTON...
CHILLICOTHE...DAVIDSON...INDIAHOMA...GOREE...MANITOU...BENJAMIN...
HEADRICK...ELMER...HOLLISTER...HARROLD...LOCKETT...GILLILAND AND RED
SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3354 9999 3464 9931 3465 9857 3341 9931
      3340 9998
TIME...MOT...LOC 0523Z 222DEG 29KT 3424 9922

AUSTIN

Special weather statement, Feb 25, 12:15 AM CST, 15 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 7:23 PM CST	Winter Weather Advisory	OUN	Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 13 more	33 hr
Feb 24, 8:07 PM CST	Special Weather Statement	OUN	Beckham, Greer, Kiowa, Washita	23 min
Feb 24, 8:18 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	42 min
Feb 24, 8:41 PM CST	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Greer, Jackson, Kiowa, Washita	49 min
Feb 24, 9:30 PM CST	Special Weather Statement	OUN	Comanche, Cotton, Jackson, Kiowa, Tillman	30 min
Feb 24, 10:04 PM CST	Special Weather Statement	OUN	Jackson, Kiowa, Tillman	41 min
Feb 24, 10:48 PM CST	Special Weather Statement	OUN	Jackson, Kiowa, Tillman	42 min
Feb 24, 11:31 PM CST	Special Weather Statement	OUN	Tillman	44 min
Feb 25, 12:15 AM CST	Special Weather Statement	OUN	Comanche, Cotton, Kiowa, Tillman	30 min
Feb 25, 12:42 AM CST	Special Weather Statement	OUN	Caddo, Comanche, Cotton, Stephens	48 min
Feb 25, 6:24 AM CST	Special Weather Statement	OUN	Seminole	21 min
Feb 25, 8:35 AM CST	Special Weather Statement	OUN	Coal	25 min
Feb 24, 11:45 PM CST	Severe Thunderstorm Warning	OUN	Knox	45 min

Nearby

Severe Thunderstorm Warnings in Texas, 2013 Every severe thunderstorm warning in 2013

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.