Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 19, NWS Norman, OK

March 9, 20134 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 9, 2013, 3:28 PM CST for 4 counties in Oklahoma. It was in force for 62 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: Mar 9, 2013, 3:28 PM CST (21:28 UTC)
Expired: Mar 9, 2013, 4:30 PM CST
In force: 62 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Carter County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK

The radar

The Norman radar (KTLX), 139 km from the middle of the area, began a volume at 21:30 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 9, 1:46 PM CST	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.5 hours before the alert went out and 139 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: 494 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 418 m²/s²
0-3 km storm-relative helicity: 599 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 Mar 9, 2:53 PM CST, 35 minutes earlier.

Area forecast discussion, Mar 9, 2:53 PM CST, 35 minutes before

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Hazardous weather outlook, Mar 9, 12:04 PM CST, 3 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1204 PM CST SAT MAR 9 2013

OKZ004>048-050>052-TXZ083>090-101815-
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-
1204 PM CST SAT MAR 9 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 ACROSS PORTIONS OF
OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA EXTENDS SOUTH OF A LINE FROM NEAR
SHAWNEE...TO PAULS VALLEY...TO ARCHER CITY.

TIMING...
THE MOST LIKELY TIME FOR STRONG TO SEVERE THUNDERSTORMS WILL BE
FROM 1 TO 9 PM.

DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS WILL MOVE EAST THIS AFTERNOON
ACROSS WESTERN OKLAHOMA AND PORTIONS OF WESTERN NORTH TEXAS.
INSTABILITY WILL SLOWLY INCREASE AHEAD OF THIS ACTIVITY NEAR THE
RED RIVER AND ACROSS PORTIONS OF SOUTH CENTRAL OKLAHOMA. THIS IS
WHERE SOME SEVERE THUNDERSTORMS MAY DEVELOP AHEAD OF A PACIFIC
COLD FRONT AND DRYLINE INTERSECTION. LARGE HAIL...UP TO THE SIZE
OF HALF DOLLARS...AND DAMAGING WIND GUSTS NEAR 60 MPH WILL BE THE
PRIMARY HAZARDS. HOWEVER...TORNADOES CANNOT BE RULED OUT
ESPECIALLY ACROSS SOUTHERN OKLAHOMA NEAR THE RED RIVER LATE THIS
AFTERNOON THROUGH THIS EVENING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CST SUNDAY MAR 10.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...70 PERCENT.

OTHER HAZARDOUS WEATHER...
EXPECT BREEZY CONDITIONS THIS AFTERNOON THROUGH TONIGHT ACROSS
THE WESTERN HALF OF OKLAHOMA AND PORTIONS OF WESTERN NORTH TEXAS.
SUSTAINED WINDS OF 20 TO 35 MPH WITH GUSTS NEARING 50 MPH CAN BE
ANTICIPATED. A WIND ADVISORY IS IN EFFECT FOR WESTERN OKLAHOMA AND
WESTERN NORTH TEXAS THROUGH TONIGHT.

ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS CAN BE EXPECTED
THIS AFTERNOON THROUGH EARLY THIS EVENING ACROSS WESTERN OKLAHOMA
AND WESTERN NORTH TEXAS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
RAIN AND A FEW ISOLATED THUNDERSTORMS MAY LINGER THROUGH EARLY
SUNDAY MORNING ACROSS SOUTHEASTERN OKLAHOMA AS AN UPPER LEVEL LOW
EXITS THE CENTRAL PLAINS. A RAIN SNOW MIX WILL ALSO BE POSSIBLE
ACROSS FAR NORTHERN AND NORTHWESTERN OKLAHOMA SUNDAY AS COLDER AIR
MOVES INTO THE REGION.

OTHER HAZARDOUS WEATHER...
BREEZY NORTH TO NORTHWEST WINDS ARE EXPECTED TO DEVELOP BEHIND A
STRONG COLD FRONT ON THE BACK SIDE OF THE UPPER LEVEL LOW ON
SUNDAY. SUSTAINED WINDS OF 20 TO 35 MPH...GUSTING UP TO 50 MPH CAN
BE EXPECTED THROUGH SUNDAY EVENING. IN RESPONSE...FIRE DANGER WILL
BE ELEVATED ACROSS WESTERN OKLAHOMA AND WESTERN NORTH TEXAS ON
SUNDAY.

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

BARNES/KURTZ

In the hours before

Special weather statement, Mar 9, 2:19 PM CST, 1 hour 9 minutes before

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Special weather statement, Mar 9, 2:33 PM CST, 55 minutes before

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Special weather statement, Mar 9, 2:35 PM CST, 53 minutes before

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Special weather statement, Mar 9, 3:05 PM CST, 23 minutes before

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Special weather statement, Mar 9, 3:12 PM CST, 16 minutes before

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Local storm report, Mar 9, 3:27 PM CST, 1 minute 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
Mar 9, 4:16 AM CST	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 26 more	34 hr
Mar 9, 12:29 PM CST	Special Weather Statement	OUN	Caddo, Comanche	31 min
Mar 9, 1:00 PM CST	Special Weather Statement	OUN	Cotton, Grady, Stephens	30 min
Mar 9, 1:45 PM CST	Special Weather Statement	OUN	Stephens	30 min
Mar 9, 2:05 PM CST	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	40 min
Mar 9, 2:19 PM CST	Special Weather Statement	OUN	Oklahoma	26 min
Mar 9, 2:33 PM CST	Special Weather Statement	OUN	Stephens	27 min
Mar 9, 2:35 PM CST	Special Weather Statement	OUN	Cleveland, McClain	25 min
Mar 9, 2:38 PM CST	Severe Thunderstorm Warning	OUN	Jefferson	67 min
Mar 9, 2:42 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, McClain	63 min
Mar 9, 3:05 PM CST	Special Weather Statement	OUN	Cleveland	25 min
Mar 9, 3:12 PM CST	Special Weather Statement	OUN	Garvin	33 min
Mar 9, 3:31 PM CST	Special Weather Statement	OUN	Garvin	29 min
Mar 9, 4:28 PM CST	Special Weather Statement	OUN	Carter, Love, Murray	62 min
Mar 9, 5:21 PM CST	Special Weather Statement	OUN	Johnston, Marshall, Pontotoc, Seminole	24 min
Mar 9, 5:43 PM CST	Special Weather Statement	OUN	Johnston, Marshall	32 min
Mar 9, 1:55 PM CST	Special Weather Statement	OUN	Archer	35 min
Mar 9, 2:00 PM CST	Severe Thunderstorm Warning	OUN	Archer, Clay	60 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.