Alert archive / Oklahoma / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 265

May 12, 200523 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2005, 11:35 PM CDT for 23 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2005, 11:35 PM CDT (04:35 UTC)
Expired
May 13, 2005, 5:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 23 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK

The radar

The Norman radar (KTLX), 109 km from the middle of the area, began a volume at 04:38 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.

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 12, 11:40 PM CDTSevere Thunderstorm WarningOUNCuster35 min
May 13, 12:01 AM CDTSevere Thunderstorm WarningOUNBlaine, Caddo, Canadian44 min
May 13, 12:08 AM CDTSevere Thunderstorm WarningOUNJackson37 min
May 13, 12:18 AM CDTSevere Thunderstorm WarningOUNKiowa28 min
May 13, 12:27 AM CDTSevere Thunderstorm WarningOUNDewey26 min
May 13, 12:42 AM CDTSevere Thunderstorm WarningOUNBlaine, Canadian, Kingfisher33 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.6 hours before the alert went out and 99 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 00:00Z on 2005-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1128 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 00:00Z on 2005-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
1128 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 7:56 PM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson64 min
May 12, 8:40 PM CDTTornado WatchSPCGreer, Harmon, Jackson5 hr
May 12, 9:35 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 10 more85 min
May 12, 10:48 PM CDTMesoscale DiscussionSPCCaddo, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more57 min
May 13, 1:04 AM CDTMesoscale DiscussionSPCCaddo, Canadian, Comanche, Cotton, Garfield, Grady and 5 more86 min
May 13, 4:04 AM CDTMesoscale DiscussionSPCComanche, Cotton, Stephens, Tillman56 min
May 13, 1:52 PM CDTMesoscale DiscussionSPCHarmon, Jackson83 min
May 13, 2:10 PM CDTTornado WatchSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more7 hr
May 13, 3:50 PM CDTMesoscale DiscussionSPCAlfalfa, Craig, Garfield, Grant, Harper, Kay and 8 more85 min
May 13, 5:05 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Craig, Custer, Delaware, Dewey and 21 more7 hr
May 13, 5:56 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more64 min
May 13, 6:25 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more65 min
May 13, 6:45 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 20 more7 hr

Nearby

Severe Thunderstorm Watches in Oklahoma, 2005Every severe thunderstorm watch in 2005

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.