Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 508, NWS Norman, OK

June 8, 2013Ellis County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 8, 2013, 7:48 PM CDT for Ellis County, Oklahoma. It was in force for 57 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
Jun 8, 2013, 7:48 PM CDT (00:48 UTC)
Expired
Jun 8, 2013, 8:45 PM CDT
In force
57 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Ellis County, OK

The radar

The Vance AFB radar (KVNX), 157 km from the middle of the area, began a volume at 00:50 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
Jun 8, 3:29 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.8 hours before the alert went out and 207 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, Amarillo Airport, TX at 00:00Z on 2013-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1603 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, Amarillo Airport, TX at 00:00Z on 2013-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
1603 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1891 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.4

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 Jun 8, 6:46 PM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, Jun 8, 6:46 PM CDT, 1 hour 2 minutes before
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Hazardous weather outlook, Jun 8, 12:11 PM CDT, 7 hours 37 minutes before
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In the hours before

Special weather statement, Jun 8, 6:25 PM CDT, 1 hour 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
625 PM CDT SAT JUN 8 2013

OKZ009-010-090015-
WOODWARD OK-ELLIS OK-
625 PM CDT SAT JUN 8 2013

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL WOODWARD AND NORTHERN
ELLIS COUNTIES UNTIL 715 PM CDT...

AT 621 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES NORTH OF
GAGE...MOVING EAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
POTENTIALLY SEVERE WINDS GUSTING OVER 55 MPH...

LAT...LON 3659 9922 3633 9924 3633 9987 3659 9988
TIME...MOT...LOC 2321Z 259DEG 31KT 3641 9978
Local storm report, Jun 8, 6:35 PM CDT, 1 hour 13 minutes before
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Special weather statement, Jun 8, 6:48 PM CDT, 1 hour before
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Special weather statement, Jun 8, 6:50 PM CDT, 58 minutes before
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Special weather statement, Jun 8, 7:24 PM CDT, 24 minutes before
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Special weather statement, Jun 8, 7:33 PM CDT, 15 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 7:24 PM CDTSpecial Weather StatementOUNWoods51 min
Jun 8, 7:31 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods59 min
Jun 8, 7:33 PM CDTSpecial Weather StatementOUNEllis57 min
Jun 8, 8:07 PM CDTSpecial Weather StatementOUNHarper53 min
Jun 8, 8:17 PM CDTSpecial Weather StatementOUNDewey28 min
Jun 8, 8:36 PM CDTSpecial Weather StatementOUNRoger Mills54 min
Jun 8, 8:54 PM CDTSpecial Weather StatementOUNCuster66 min
Jun 8, 9:23 PM CDTSpecial Weather StatementOUNCuster67 min
Jun 8, 9:24 PM CDTSpecial Weather StatementOUNBeckham66 min
Jun 8, 9:53 PM CDTSpecial Weather StatementOUNBeckham, Washita67 min
Jun 8, 10:05 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Greer, Jackson, Kiowa, Washita55 min
Jun 8, 10:19 PM CDTSpecial Weather StatementOUNHarmon56 min
Jun 8, 10:52 PM CDTSevere Thunderstorm WarningOUNComanche, Greer, Jackson, Kiowa, Tillman53 min
Jun 8, 11:08 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon, Jackson52 min
Jun 8, 11:19 PM CDTSpecial Weather StatementOUNCaddo, Comanche, Grady56 min
Jun 8, 11:41 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Jackson, Kiowa, Tillman64 min
Jun 9, 12:13 AM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Grady, Jefferson, Stephens62 min
Jun 9, 1:08 AM CDTSpecial Weather StatementOUNJefferson, Stephens52 min
Jun 9, 2:32 AM CDTSpecial Weather StatementOUNLincoln, Oklahoma43 min
Jun 9, 3:11 AM CDTSpecial Weather StatementOUNCleveland, McClain, Pottawatomie49 min
Jun 9, 3:54 AM CDTSpecial Weather StatementOUNBryan, Marshall51 min
Jun 9, 5:05 AM CDTSpecial Weather StatementOUNBryan25 min
Jun 8, 11:54 PM CDTSevere Thunderstorm WarningOUNFoard, Hardeman, Knox66 min
Jun 9, 12:44 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Foard, Knox, Wichita, Wilbarger61 min
Jun 9, 1:44 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor46 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.