Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 71, NWS Norman, OK

May 11, 2010Beckham County, Custer County, Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 11, 2010, 5:52 PM CDT for Beckham County, Custer County, Washita County, Oklahoma. It was in force for 24 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 11, 2010, 5:52 PM CDT (22:52 UTC)
Expired
May 11, 2010, 6:16 PM CDT
In force
24 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Beckham County, OK, Custer County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 118 km from the middle of the area, began a volume at 22:54 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
May 11, 3:47 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.9 hours before the alert went out and 167 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 2010-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 748 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 2010-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 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
748 J/kg
Mixed-layer CIN
-314 J/kg
Mixed-layer LCL
744 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
189 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.9

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 11, 3:23 PM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, May 11, 3:23 PM CDT, 2 hours 29 minutes before
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Hazardous weather outlook, May 11, 2:34 PM CDT, 3 hours 18 minutes before
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In the hours before

Local storm report, May 11, 2:01 PM CDT, 3 hours 51 minutes before
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Local storm report, May 11, 4:20 PM CDT, 1 hour 32 minutes before
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Special weather statement, May 11, 5:00 PM CDT, 52 minutes before
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Special weather statement, May 11, 5:14 PM CDT, 38 minutes before
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Special weather statement, May 11, 5:17 PM CDT, 35 minutes before
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Special weather statement, May 11, 5:40 PM CDT, 12 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 7:00 PM CDTTornado WarningOUNAtoka, Bryan, Johnston, Marshall50 min
May 10, 7:06 PM CDTTornado WarningOUNBryan, Marshall54 min
May 10, 7:13 PM CDTTornado WarningOUNGarvin, McClain, Murray, Pontotoc62 min
May 10, 7:25 PM CDTSevere Thunderstorm WarningOUNHughes, McClain, Pontotoc, Pottawatomie, Seminole50 min
May 10, 7:26 PM CDTTornado WarningOUNCarter, Garvin, Johnston, Murray, Pontotoc49 min
May 10, 7:45 PM CDTTornado WarningOUNHughes, Pontotoc, Seminole45 min
May 10, 7:53 PM CDTTornado WarningOUNBryan67 min
May 10, 8:04 PM CDTTornado WarningOUNAtoka, Bryan, Carter, Coal, Johnston, Marshall and 1 more56 min
May 10, 8:05 PM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Johnston, Love, Marshall55 min
May 10, 8:09 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Hughes, Johnston, Pontotoc66 min
May 10, 8:17 PM CDTTornado WarningOUNCarter, Johnston, Love, Marshall43 min
May 10, 8:54 PM CDTTornado WarningOUNAtoka, Bryan51 min
May 10, 9:00 PM CDTSevere Thunderstorm WarningOUNBryan, Love, Marshall60 min
May 10, 9:43 PM CDTSevere Thunderstorm WarningOUNBryan32 min
May 10, 9:59 PM CDTSevere Thunderstorm WarningOUNBryan48 min
May 10, 8:35 PM CDTTornado WarningOUNClay40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2010Every severe thunderstorm warning in 2010

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.