Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 888

May 9, 200326 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 7:12 PM CDT for 26 counties in Oklahoma. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 7:12 PM CDT (00:12 UTC)
Expired
May 9, 2003, 8:15 PM CDT
In force
63 min
Issued by
the Storm Prediction Center
All 26 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Oklahoma County, OK, Roger Mills County, OK, Stephens County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 122 km from the middle of the area, began a volume at 00:11 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, 0.2 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, Norman, OK at 00:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2823 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 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939587897Sfc1 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
2823 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1182 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.1

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
May 9, 7:45 PM CDTTornado WatchSPCAlfalfa, Beckham, Blaine, Canadian, Custer, Dewey and 9 more5 hr
May 9, 7:47 PM CDTMesoscale DiscussionSPCCraig, Mayes, Nowata, Osage, Ottawa, Pawnee and 2 more88 min
May 9, 8:24 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Custer, Garfield, Kingfisher, Logan and 2 more66 min
May 9, 9:41 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Kingfisher, Logan, Oklahoma64 min
May 9, 10:51 PM CDTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, Lincoln, Mayes and 11 more54 min
May 9, 11:10 PM CDTTornado WatchSPCCherokee, Craig, Creek, Delaware, Lincoln, Mayes and 12 more6 hr
May 10, 1:22 AM CDTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, Lincoln, Mayes and 12 more83 min
May 10, 9:16 AM CDTMesoscale DiscussionSPCCleveland, Craig, Creek, Hughes, Lincoln, McClain and 12 more3 hr
May 10, 10:54 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Creek, Delaware, Mayes and 6 more66 min
May 10, 11:55 AM CDTTornado WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more7 hr
May 10, 1:59 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 29 more2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion in 2003

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.