Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 809

May 9, 200630 counties in Oklahoma; 11 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 3:45 PM CDT for 30 counties in Oklahoma; 11 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 3:45 PM CDT (20:45 UTC)
Expired
May 9, 2006, 5:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 41 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Stephens County, OK, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Red River County, TX

The radar

The Norman radar (KTLX), 156 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.8 hours before the alert went out and 157 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 12:00Z on 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1694 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 12:00Z on 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 386 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
1694 J/kg
Mixed-layer CIN
-324 J/kg
Mixed-layer LCL
1000 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
386 m²/s²
0-3 km storm-relative helicity
449 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
May 9, 1:13 AM CDTMesoscale DiscussionSPCAlfalfa, Craig, Grant, Kay, Mayes, Noble and 6 more92 min
May 9, 4:24 AM CDTSevere Thunderstorm WatchSPCCraig, Delaware, Mayes, Nowata, Osage, Ottawa and 2 more4 hr
May 9, 4:04 PM CDTTornado WatchSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 12 more7 hr
May 9, 4:46 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Mayes, Nowata and 5 more89 min
May 9, 4:56 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Harper and 5 more2 hr
May 9, 5:07 PM CDTTornado WatchSPCAdair, Cherokee, Creek, Delaware, Mayes, Muskogee and 5 more6 hr
May 9, 6:01 PM CDTSevere Thunderstorm WatchSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 8 more7 hr
May 9, 6:30 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 17 more90 min
May 8, 7:42 PM CDTMesoscale DiscussionSPCNewton93 min
May 9, 4:08 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Comal, Edwards, Gillespie and 11 more97 min
May 9, 6:30 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bell, Bexar, Blanco, Burnet and 27 more4 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Texas, 2006Every mesoscale discussion in 2006

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.