Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 243, NWS Norman, OK

May 15, 2013Carter County, Garvin County, Stephens County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 15, 2013, 4:43 PM CDT for Carter County, Garvin County, Stephens County, Oklahoma. It was in force for 47 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: May 15, 2013, 4:43 PM CDT (21:43 UTC)
Expired: May 15, 2013, 5:30 PM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Carter County, OK, Garvin County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 97 km from the middle of the area, began a volume at 21:45 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
May 15, 3:28 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.7 hours before the alert went out and 184 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: 109 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 May 15, 2:38 PM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, May 15, 2:38 PM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, May 15, 11:58 AM CDT, 4 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1158 AM CDT WED MAY 15 2013

OKZ004>048-050>052-TXZ083>090-161700-
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-
1158 AM CDT WED MAY 15 2013

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

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF
WESTERN NORTH TEXAS.

LOCATION...
THE MAIN RISK FOR SEVERE THUNDERSTORMS WILL EXIST SOUTH OF THE RED
RIVER ACROSS WESTERN NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM
4 PM TO 10 PM.

IMPACTS...
THE MAIN THREAT THIS AFTERNOON AND EVENING WILL BE HAIL UP TO THE
SIZE OF GOLF BALLS AND DAMAGING WIND GUSTS OVER 70 MPH...ALTHOUGH
TORNADOES CANNOT BE RULED OUT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL IN THE
RISK AREA SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS LATE
THIS AFTERNOON THROUGH THE EVENING.

DISCUSSION...
AS A LARGE WEATHER DISTURBANCE MOVES INTO NORTHERN TEXAS AND
OKLAHOMA TODAY AND TONIGHT...SCATTERED TO NUMEROUS SHOWERS AND
STORMS ARE EXPECTED ACROSS SOUTHEAST PORTIONS OF OKLAHOMA. THE
CHANCE FOR ORGANIZED SEVERE WITH THESE STORMS WILL BE LOW.

DURING THE LATE AFTERNOON HOURS...A DRYLINE WILL SHARPEN JUST
WEST OF OKLAHOMA AND WESTERN NORTH TEXAS. ISOLATED OR SCATTERED
STORMS MAY FORM JUST EAST OF THE DRYLINE AND MOVE IN A EAST
AND SOUTHEAST DIRECTION IMPACTING WESTERN NORTH TEXAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY MAY 16.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF THUNDERSTORMS IF STORMS OCCUR...70 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS THAT DEVELOP WEDNESDAY EVENING MAY CONTINUE ACROSS
SOUTH-CENTRAL AND SOUTHEAST OKLAHOMA EARLY THURSDAY MORNING. NO
SEVERE WEATHER IS EXPECTED THURSDAY MORNING.

THUNDERSTORMS CHANCES WILL RETURN SATURDAY...MAINLY OVER WESTERN
OKLAHOMA NEAR A DRYLINE. ISOLATED SEVERE STORMS WILL BE POSSIBLE
LATE SATURDAY.

GREATER INSTABILITY AND WIND SHEAR WILL SUPPORT SEVERE STORMS ON
SUNDAY AND MONDAY...MAINLY OVER CENTRAL AND EASTERN PORTIONS OF
OKLAHOMA.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY
5 AM THURSDAY MORNING.

In the hours before

Special weather statement, May 15, 3:35 PM CDT, 1 hour 8 minutes before

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Special weather statement, May 15, 3:46 PM CDT, 57 minutes before

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Special weather statement, May 15, 3:58 PM CDT, 45 minutes before

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Special weather statement, May 15, 4:02 PM CDT, 41 minutes before

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Special weather statement, May 15, 4:03 PM CDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
403 PM CDT WED MAY 15 2013

OKZ031-152145-
SEMINOLE OK-
403 PM CDT WED MAY 15 2013

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SEMINOLE COUNTY UNTIL 445
PM CDT...

AT 359 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF BOWLEGS...MOVING NORTHEAST AT 20 MPH.

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

LAT...LON 3502 9668 3508 9677 3509 9677 3530 9668
      3529 9652 3518 9651
TIME...MOT...LOC 2059Z 218DEG 19KT 3509 9671

KURTZ

Special weather statement, May 15, 4:33 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
433 PM CDT WED MAY 15 2013

TXZ090-152200-
CLAY TX-
433 PM CDT WED MAY 15 2013

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL CLAY COUNTY UNTIL
500 PM CDT...

AT 430 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES NORTH OF
BELLEVUE...MOVING NORTHEAST AT 25 MPH.

HAZARDS INCLUDE...
DIME SIZED HAIL...
WIND GUSTS TO 50 MPH...

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF EAST CENTRAL CLAY
COUNTY.

LAT...LON 3376 9813 3389 9800 3389 9798 3366 9798
      3365 9798
TIME...MOT...LOC 2130Z 218DEG 22KT 3376 9800

AUSTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 11:23 PM CDT	Special Weather Statement	OUN	Tillman	22 min
May 14, 11:45 PM CDT	Special Weather Statement	OUN	Tillman	45 min
May 15, 12:31 AM CDT	Special Weather Statement	OUN	Tillman	29 min
May 15, 12:43 PM CDT	Special Weather Statement	OUN	Cleveland	32 min
May 15, 12:52 PM CDT	Special Weather Statement	OUN	Jefferson	38 min
May 15, 1:41 PM CDT	Special Weather Statement	OUN	Pottawatomie	34 min
May 15, 1:52 PM CDT	Special Weather Statement	OUN	Cotton	23 min
May 15, 1:55 PM CDT	Special Weather Statement	OUN	Murray	35 min
May 15, 2:03 PM CDT	Special Weather Statement	OUN	Payne	27 min
May 15, 2:12 PM CDT	Special Weather Statement	OUN	Garvin	33 min
May 15, 2:22 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	38 min
May 15, 2:27 PM CDT	Special Weather Statement	OUN	Carter	33 min
May 15, 2:34 PM CDT	Special Weather Statement	OUN	Cotton	41 min
May 15, 2:40 PM CDT	Special Weather Statement	OUN	Love	35 min
May 15, 2:48 PM CDT	Special Weather Statement	OUN	Pottawatomie	27 min
May 15, 2:52 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	38 min
May 15, 2:57 PM CDT	Special Weather Statement	OUN	Comanche	48 min
May 15, 3:16 PM CDT	Special Weather Statement	OUN	Stephens	29 min
May 15, 3:26 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Jefferson, Stephens	3 hr
May 15, 3:31 PM CDT	Special Weather Statement	OUN	Garvin	29 min
May 15, 3:35 PM CDT	Special Weather Statement	OUN	Seminole	25 min
May 15, 3:37 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin	53 min
May 15, 3:46 PM CDT	Special Weather Statement	OUN	Stephens	29 min
May 15, 3:58 PM CDT	Special Weather Statement	OUN	Comanche	32 min
May 15, 4:01 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	44 min
May 15, 4:02 PM CDT	Special Weather Statement	OUN	Cotton	28 min
May 15, 4:03 PM CDT	Special Weather Statement	OUN	Seminole	42 min
May 15, 4:41 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin	2 hr
May 15, 4:47 PM CDT	Special Weather Statement	OUN	Jefferson	28 min
May 15, 4:50 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	40 min
May 15, 5:33 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	42 min
May 15, 5:45 PM CDT	Special Weather Statement	OUN	Carter, Murray	45 min
May 15, 6:14 PM CDT	Special Weather Statement	OUN	Johnston, Murray, Pontotoc	46 min
May 15, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
May 15, 6:24 PM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Love, Murray	3 hr
May 15, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	50 min
May 14, 8:30 PM CDT	Special Weather Statement	OUN	Knox	45 min
May 14, 9:21 PM CDT	Special Weather Statement	OUN	Knox	39 min
May 14, 10:31 PM CDT	Special Weather Statement	OUN	Baylor	44 min
May 15, 1:20 AM CDT	Special Weather Statement	OUN	Wichita	25 min
May 15, 4:33 PM CDT	Special Weather Statement	OUN	Clay	27 min
May 15, 5:48 PM CDT	Severe Thunderstorm Warning	OUN	Clay	42 min
May 15, 6:31 PM CDT	Tornado Warning	OUN	Clay	14 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.