Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 2302

September 30, 200545 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 30, 2005, 9:23 PM CDT for 45 counties in Oklahoma; 18 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Sep 30, 2005, 9:23 PM CDT (02:23 UTC)
Expired
Sep 30, 2005, 11:00 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 63 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Foard County, TX, Grayson County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jack County, TX, Knox County, TX, Lipscomb County, TX, Montague County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 79 km from the middle of the area, began a volume at 02:25 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 110 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 2005-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 325 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 2005-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
325 J/kg
Mixed-layer CIN
-239 J/kg
Mixed-layer LCL
1290 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 30, 9:25 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Canadian, Carter, Cleveland, Coal and 26 more7 hr
Sep 30, 10:51 PM CDTMesoscale DiscussionSPCAlfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 44 more84 min
Oct 1, 1:15 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 29 more2 hr
Oct 1, 3:53 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Cherokee, Craig, Creek, Delaware and 19 more97 min
Oct 1, 4:10 PM CDTSevere Thunderstorm WatchSPCGarfield, Grant, Kay, Noble, Osage, Washington3 hr
Oct 1, 6:04 PM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Noble, Osage, Washington86 min

Nearby

Mesoscale Discussions in Oklahoma, 2005Mesoscale Discussions in Texas, 2005Every mesoscale discussion 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.