Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 635, NWS Norman, OK

August 10, 2009Kay County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 2009, 4:19 PM CDT for Kay County, Oklahoma. It was in force for 41 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
Aug 10, 2009, 4:19 PM CDT (21:19 UTC)
Expired
Aug 10, 2009, 5:00 PM CDT
In force
41 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Kay County, OK

The radar

The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 21:23 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 12:00Z, 9.3 hours before the alert went out and 37 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 12:00Z on 2009-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1665 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 12:00Z on 2009-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
1665 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 1:59 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods61 min
Aug 10, 2:49 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant56 min
Aug 10, 3:07 PM CDTSevere Thunderstorm WarningOUNNoble38 min
Aug 10, 3:44 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kingfisher, Major61 min
Aug 10, 4:43 PM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher, Logan, Major, Noble, Payne47 min
Aug 10, 5:32 PM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne48 min
Aug 10, 6:10 PM CDTSevere Thunderstorm WarningOUNHarper, Woods50 min
Aug 10, 6:44 PM CDTSevere Thunderstorm WarningOUNWoods, Woodward61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009Every severe thunderstorm warning in 2009

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.