Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 52, NWS Norman, OK

March 30, 2013Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 30, 2013, 6:52 PM CDT for Seminole County, Oklahoma. It was in force for 23 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 30, 2013, 6:52 PM CDT (23:52 UTC)
Expired
Mar 30, 2013, 7:15 PM CDT
In force
23 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Seminole County, OK

The radar

The Norman radar (KTLX), 63 km from the middle of the area, began a volume at 23:53 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.

IssuedProductOfficeLasted
Mar 30, 6:06 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.9 hours before the alert went out and 72 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 2013-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2013-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 286 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
21 J/kg
Mixed-layer CIN
-317 J/kg
Mixed-layer LCL
786 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
286 m²/s²
0-3 km storm-relative helicity
508 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.7

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 30, 6:36 PM CDT, 16 minutes earlier.

Area forecast discussion, Mar 30, 6:36 PM CDT, 16 minutes before
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Hazardous weather outlook, Mar 30, 12:00 PM CDT, 6 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CDT SAT MAR 30 2013

OKZ004>048-050>052-TXZ083>090-311000-
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 CDT SAT MAR 30 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 THROUGH TONIGHT
ACROSS MUCH OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA IS SOUTHEAST OF A LINE FROM ARNETT TO MEDFORD.
THE SLIGHT RISK AREA INCLUDES ALL OF WESTERN NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM LATE
THIS AFTERNOON INTO THE EVENING AND OVERNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PREPARE FOR POSSIBLE SEVERE WEATHER OPERATIONS THIS
AFTERNOON THROUGH TONIGHT.

DISCUSSION...
MODERATE INSTABILITY WILL AGAIN BE IN PLACE ACROSS OKLAHOMA AND
NORTH TEXAS TODAY. SEVERAL WEAK WAVES IN THE FLOW ALOFT...ALONG
WITH SEVERAL BOUNDARIES AT THE SURFACE...WILL SUPPORT SOME
THUNDERSTORM DEVELOPMENT. AFTERNOON HEATING WILL ENHANCE THE
INSTABILITY...AND STORMS WILL LIKELY DEVELOP LATE THIS AFTERNOON
OR EARLY EVENING. A WEAK COLD FRONT WILL MOVE SOUTHEAST THROUGH THE
AREA TODAY AND TONIGHT... AND LOW-LEVEL CONVERGENCE ALONG THIS FRONT
WILL HELP SUSTAIN STORM DEVELOPMENT INTO THE NIGHT. THE MAIN CONCERNS
WITH THESE STORMS WILL BE LARGE HAIL... ALTHOUGH STRONG WINDS WILL
ALSO BE POSSIBLE. THE RISK WILL DIMINISH FROM NORTHWEST TO SOUTHEAST
WITH TIME AS THE FRONT MOVES THROUGH.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAR 31.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

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

THUNDERSTORM OUTLOOK...
THUNDERSTORMS CHANCES WILL PERSIST INTO SUNDAY. THUNDERSTORM
CHANCES WILL AGAIN DEVELOP MONDAY AND EARLY TUESDAY.

OTHER HAZARDOUS WEATHER...
TEMPERATURES WILL DROP TO AROUND FREEZING IN NORTHERN OKLAHOMA TUESDAY
AND WEDNESDAY MORNINGS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
SUNDAY MARCH 31.

.26.

In the hours before

Special weather statement, Mar 30, 5:36 PM CDT, 1 hour 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
536 PM CDT SAT MAR 30 2013

OKZ038-302300-
COMANCHE OK-
536 PM CDT SAT MAR 30 2013

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN COMANCHE COUNTY
UNTIL 600 PM CDT...

AT 530 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES WEST OF
MEERS...MOVING NORTHEAST AT 15 MPH. THIS STORM IS OVER THE WICHITA
MOUNTAINS WILDLIFE REFUGE. HIKERS AND OTHERS IN THE REFUGE SHOULD
FIND A PLACE OF SHELTER.

STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP.

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

LAT...LON 3478 9883 3486 9870 3485 9852 3470 9842
      3461 9874
TIME...MOT...LOC 2230Z 243DEG 11KT 3474 9871

..SPEG.
Local storm report, Mar 30, 6:27 PM CDT, 25 minutes before
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Local storm report, Mar 30, 6:31 PM CDT, 21 minutes before
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Local storm report, Mar 30, 6:34 PM CDT, 18 minutes before
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Special weather statement, Mar 30, 6:36 PM CDT, 16 minutes before
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Local storm report, Mar 30, 6:49 PM CDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 7:27 PM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher, Logan48 min
Mar 29, 7:31 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman44 min
Mar 29, 8:06 PM CDTSevere Thunderstorm WarningOUNCotton39 min
Mar 29, 8:11 PM CDTSevere Thunderstorm WarningOUNGarfield, Noble49 min
Mar 29, 8:11 PM CDTSevere Thunderstorm WarningOUNPayne49 min
Mar 29, 8:13 PM CDTSevere Thunderstorm WarningOUNLogan47 min
Mar 29, 8:17 PM CDTSpecial Weather StatementOUNCotton13 min
Mar 29, 9:00 PM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma45 min
Mar 29, 9:12 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman48 min
Mar 29, 9:26 PM CDTSevere Thunderstorm WarningOUNCotton, Jefferson49 min
Mar 29, 9:51 PM CDTSpecial Weather StatementOUNLincoln24 min
Mar 29, 9:58 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman47 min
Mar 29, 10:10 PM CDTSevere Thunderstorm WarningOUNJefferson50 min
Mar 29, 10:33 PM CDTSpecial Weather StatementOUNAlfalfa, Woods27 min
Mar 29, 10:54 PM CDTSpecial Weather StatementOUNJefferson36 min
Mar 29, 11:02 PM CDTSpecial Weather StatementOUNWoods28 min
Mar 29, 11:08 PM CDTSpecial Weather StatementOUNKingfisher37 min
Mar 29, 11:10 PM CDTSpecial Weather StatementOUNLincoln35 min
Mar 29, 11:19 PM CDTSpecial Weather StatementOUNGrant26 min
Mar 29, 11:34 PM CDTSpecial Weather StatementOUNCarter, Jefferson, Love26 min
Mar 29, 11:47 PM CDTSpecial Weather StatementOUNNoble43 min
Mar 29, 11:49 PM CDTSpecial Weather StatementOUNGrant26 min
Mar 30, 12:46 AM CDTSpecial Weather StatementOUNKingfisher44 min
Mar 30, 1:18 AM CDTSpecial Weather StatementOUNAlfalfa42 min
Mar 30, 2:16 AM CDTSpecial Weather StatementOUNGrant29 min
Mar 30, 3:12 AM CDTSpecial Weather StatementOUNLogan, Oklahoma33 min
Mar 30, 6:19 AM CDTSpecial Weather StatementOUNLincoln26 min
Mar 30, 6:31 AM CDTSevere Thunderstorm WarningOUNLincoln44 min
Mar 30, 6:40 AM CDTSpecial Weather StatementOUNKay35 min
Mar 30, 5:36 PM CDTSpecial Weather StatementOUNComanche24 min
Mar 30, 5:49 PM CDTSevere Thunderstorm WarningOUNComanche41 min
Mar 30, 6:23 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche37 min
Mar 30, 6:25 PM CDTSevere Thunderstorm WarningOUNComanche35 min
Mar 30, 6:36 PM CDTSpecial Weather StatementOUNSeminole24 min
Mar 30, 6:55 PM CDTSpecial Weather StatementOUNSeminole35 min
Mar 29, 8:41 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Hardeman, Knox, Wilbarger49 min
Mar 29, 8:50 PM CDTSevere Thunderstorm WarningOUNClay40 min
Mar 29, 9:34 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger41 min
Mar 29, 9:38 PM CDTSpecial Weather StatementOUNArcher37 min
Mar 29, 10:13 PM CDTSpecial Weather StatementOUNClay47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013Every 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.