Alert archive / Oklahoma / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 169

April 20, 200510 counties in Kansas; 18 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 20, 2005, 3:50 PM CDT for 10 counties in Kansas; 18 counties in Oklahoma; 18 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 20, 2005, 3:50 PM CDT (20:50 UTC)
Expired
Apr 20, 2005, 11:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 46 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Harper County, KS, Kingman County, KS, Kiowa County, KS, Meade County, KS, Pratt County, KS, Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 133 km from the middle of the area, began a volume at 20:53 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

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

IssuedProductOfficeCountiesLasted
Apr 20, 5:12 PM CDTSevere Thunderstorm WarningDDCClark, Comanche33 min
Apr 20, 5:21 PM CDTSevere Thunderstorm WarningAMAGray54 min
Apr 20, 5:30 PM CDTSevere Thunderstorm WarningLUBHall60 min
Apr 20, 5:31 PM CDTSevere Thunderstorm WarningOUNHarper29 min
Apr 20, 5:49 PM CDTTornado WarningLUBHall56 min
Apr 20, 5:58 PM CDTSevere Thunderstorm WarningOUNHarper32 min
Apr 20, 5:59 PM CDTSevere Thunderstorm WarningAMACollingsworth61 min
Apr 20, 6:12 PM CDTSevere Thunderstorm WarningAMAGray63 min
Apr 20, 6:15 PM CDTSevere Thunderstorm WarningAMAWheeler60 min
Apr 20, 6:16 PM CDTTornado WarningDDCClark29 min
Apr 20, 6:21 PM CDTSevere Thunderstorm WarningDDCEdwards, Kiowa24 min
Apr 20, 6:21 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon54 min
Apr 20, 6:22 PM CDTSevere Thunderstorm WarningAMAHemphill53 min
Apr 20, 6:38 PM CDTSevere Thunderstorm WarningLUBChildress37 min
Apr 20, 6:45 PM CDTTornado WarningLUBHall75 min
Apr 20, 6:50 PM CDTTornado WarningDDCClark, Meade40 min
Apr 20, 6:53 PM CDTSevere Thunderstorm WarningDDCClark52 min
Apr 20, 7:05 PM CDTSevere Thunderstorm WarningAMALipscomb64 min
Apr 20, 7:08 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon, Jackson52 min
Apr 20, 7:11 PM CDTTornado WarningDDCClark49 min
Apr 20, 7:12 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills48 min
Apr 20, 7:25 PM CDTSevere Thunderstorm WarningAMABeaver65 min
Apr 20, 7:30 PM CDTSevere Thunderstorm WarningDDCClark, Meade45 min
Apr 20, 7:41 PM CDTSevere Thunderstorm WarningOUNHarper64 min
Apr 20, 7:43 PM CDTSevere Thunderstorm WarningDDCClark47 min
Apr 20, 7:43 PM CDTSevere Thunderstorm WarningLUBChildress62 min
Apr 20, 7:48 PM CDTSevere Thunderstorm WarningOUNCuster, Dewey, Washita57 min
Apr 20, 7:51 PM CDTSevere Thunderstorm WarningDDCComanche, Kiowa39 min
Apr 20, 7:59 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa46 min
Apr 20, 8:00 PM CDTSevere Thunderstorm WarningOUNHarmon45 min
Apr 20, 8:18 PM CDTSevere Thunderstorm WarningDDCClark57 min
Apr 20, 8:26 PM CDTSevere Thunderstorm WarningDDCMeade34 min
Apr 20, 8:36 PM CDTSevere Thunderstorm WarningDDCComanche39 min
Apr 20, 8:43 PM CDTSevere Thunderstorm WarningOUNJackson, Tillman47 min
Apr 20, 8:45 PM CDTSevere Thunderstorm WarningOUNCuster, Washita30 min
Apr 20, 8:51 PM CDTFlash Flood WarningOUNHarmon, Jackson3 hr
Apr 20, 9:02 PM CDTSevere Thunderstorm WarningLUBChildress28 min
Apr 20, 9:11 PM CDTSevere Thunderstorm WarningDDCClark49 min
Apr 20, 9:15 PM CDTSevere Thunderstorm WarningDDCComanche45 min
Apr 20, 9:16 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa44 min
Apr 20, 9:21 PM CDTSevere Thunderstorm WarningOUNHarmon39 min
Apr 20, 9:27 PM CDTSevere Thunderstorm WarningOUNTillman33 min
Apr 20, 9:28 PM CDTSevere Thunderstorm WarningDDCBarber49 min
Apr 20, 9:55 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson65 min
Apr 20, 10:03 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods42 min
Apr 20, 10:05 PM CDTSevere Thunderstorm WarningICTHarper55 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.8 hours before the alert went out and 155 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 12:00Z on 2005-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 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 12:00Z on 2005-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -40 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
42 J/kg
Mixed-layer CIN
-441 J/kg
Mixed-layer LCL
2031 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-40 m²/s²
0-3 km storm-relative helicity
-53 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
Apr 20, 6:57 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Ford, Kingman and 2 more93 min
Apr 19, 7:40 PM CDTMesoscale DiscussionSPCHarmon, Jackson, Tillman65 min
Apr 20, 3:28 PM CDTMesoscale DiscussionSPCBeckham, Custer, Dewey, Ellis, Greer, Harmon and 6 more2 hr
Apr 19, 7:50 PM CDTMesoscale DiscussionSPCDimmit, Edwards, Kinney, La Salle, Maverick, Real and 4 more55 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2005Severe Thunderstorm Watches in Texas, 2005Severe Thunderstorm Watches in Kansas, 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.