Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 69, NWS Norman, OK

March 31, 2013Cleveland County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 31, 2013, 3:21 AM CDT for Cleveland County, McClain County, Oklahoma. It was in force for 39 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 31, 2013, 3:21 AM CDT (08:21 UTC)
Expired
Mar 31, 2013, 4:00 AM CDT
In force
39 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Cleveland County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 27 km from the middle of the area, began a volume at 08:22 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

Lamont, OK (KLMN), launched 00:00Z, 8.4 hours before the alert went out and 169 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, Lamont, OK at 00:00Z on 2013-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 354 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, Lamont, OK at 00:00Z on 2013-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.19395878Sfc1 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
354 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
2229 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 31, 1:11 AM CDT, 2 hours 10 minutes earlier.

Area forecast discussion, Mar 31, 1:11 AM CDT, 2 hours 10 minutes before
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Hazardous weather outlook, Mar 30, 7:57 PM CDT, 7 hours 24 minutes before
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In the hours before

Special weather statement, Mar 31, 2:31 AM CDT, 50 minutes before
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Special weather statement, Mar 31, 2:32 AM CDT, 49 minutes before
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Special weather statement, Mar 31, 2:33 AM CDT, 48 minutes before
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Special weather statement, Mar 31, 2:34 AM CDT, 47 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 7:00 PM CDTSevere Thunderstorm WarningOUNComanche60 min
Mar 30, 7:05 PM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole40 min
Mar 30, 7:22 PM CDTSpecial Weather StatementOUNGrady8 min
Mar 30, 7:38 PM CDTSevere Thunderstorm WarningOUNGrady52 min
Mar 30, 7:42 PM CDTSpecial Weather StatementOUNCotton33 min
Mar 30, 7:46 PM CDTSevere Thunderstorm WarningOUNHughes, Seminole44 min
Mar 30, 7:52 PM CDTSevere Thunderstorm WarningOUNCotton38 min
Mar 30, 8:25 PM CDTSevere Thunderstorm WarningOUNGrady50 min
Mar 30, 8:28 PM CDTSevere Thunderstorm WarningOUNHughes, Seminole47 min
Mar 30, 8:29 PM CDTSevere Thunderstorm WarningOUNCotton46 min
Mar 30, 8:55 PM CDTSpecial Weather StatementOUNMcClain20 min
Mar 30, 9:10 PM CDTSevere Thunderstorm WarningOUNHughes50 min
Mar 30, 9:14 PM CDTSevere Thunderstorm WarningOUNGrady46 min
Mar 30, 9:59 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Hughes46 min
Mar 30, 10:45 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Hughes60 min
Mar 30, 11:41 PM CDTSevere Thunderstorm WarningOUNAtoka64 min
Mar 31, 2:31 AM CDTSpecial Weather StatementOUNWashita44 min
Mar 31, 2:32 AM CDTSpecial Weather StatementOUNGrant43 min
Mar 31, 2:33 AM CDTSpecial Weather StatementOUNBlaine, Canadian, Kingfisher, Oklahoma27 min
Mar 31, 2:34 AM CDTSpecial Weather StatementOUNCaddo41 min
Mar 31, 2:37 AM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Roger Mills, Washita53 min
Mar 31, 2:57 AM CDTSevere Thunderstorm WarningOUNCaddo, Canadian63 min
Mar 31, 3:03 AM CDTSevere Thunderstorm WarningOUNCanadian, Oklahoma42 min
Mar 31, 3:24 AM CDTSevere Thunderstorm WarningOUNWashita66 min
Mar 31, 3:49 AM CDTSpecial Weather StatementOUNGrady26 min
Mar 31, 3:49 AM CDTSevere Thunderstorm WarningOUNCleveland, McClain41 min
Mar 31, 4:13 AM CDTSpecial Weather StatementOUNGrady47 min
Mar 31, 4:17 AM CDTSpecial Weather StatementOUNGreer43 min
Mar 31, 4:25 AM CDTSpecial Weather StatementOUNPottawatomie35 min
Mar 31, 4:33 AM CDTSevere Thunderstorm WarningOUNCleveland, Garvin, McClain, Pontotoc, Pottawatomie, Seminole42 min
Mar 31, 4:57 AM CDTSpecial Weather StatementOUNCarter, Garvin, Stephens48 min
Mar 31, 5:03 AM CDTSpecial Weather StatementOUNHughes, Murray, Pontotoc42 min
Mar 31, 5:08 AM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Murray67 min
Mar 31, 5:14 AM CDTSevere Thunderstorm WarningOUNCoal, Garvin, Pontotoc46 min
Mar 31, 5:16 AM CDTSevere Thunderstorm WarningOUNGarvin, Johnston, Murray29 min
Mar 31, 5:38 AM CDTSevere Thunderstorm WarningOUNJohnston, Murray37 min
Mar 31, 5:55 AM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Johnston, Pontotoc50 min
Mar 31, 6:02 AM CDTSevere Thunderstorm WarningOUNBryan, Carter, Johnston, Love, Marshall58 min
Mar 31, 6:08 AM CDTSevere Thunderstorm WarningOUNAtoka, Bryan52 min
Mar 31, 7:00 AM CDTSpecial Weather StatementOUNBryan30 min
Mar 31, 8:17 AM CDTSpecial Weather StatementOUNComanche, Kiowa28 min
Mar 31, 8:47 AM CDTSpecial Weather StatementOUNCaddo, Comanche28 min
Mar 30, 7:30 PM CDTSpecial Weather StatementOUNFoard30 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.