Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 447

March 17, 200831 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 17, 2008, 10:21 PM CDT for 31 counties in Oklahoma; 5 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Mar 17, 2008, 10:21 PM CDT (03:21 UTC)
Expired
Mar 17, 2008, 11:15 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 36 counties

Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Garvin County, OK, Grady 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, Marshall County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 96 km from the middle of the area, began a volume at 03:22 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.4 hours before the alert went out and 79 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 2008-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 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 2008-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897117Sfc1 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
837 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1032 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.0

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
Mar 17, 7:09 PM CDTSevere Thunderstorm WatchSPCCaddo, Canadian, Carter, Cleveland, Coal, Comanche and 19 more7 hr
Mar 17, 7:34 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Haskell, LeFlore and 6 more56 min
Mar 17, 9:36 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Creek, Delaware, Mayes, Muskogee and 4 more114 min
Mar 17, 10:16 PM CDTTornado WatchSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 16 more8 hr
Mar 18, 1:13 AM CDTMesoscale DiscussionSPCAdair, Caddo, Canadian, Carter, Cherokee, Cleveland and 44 more62 min
Mar 18, 2:23 AM CDTMesoscale DiscussionSPCAdair2 hr
Mar 18, 2:46 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more89 min
Mar 18, 5:54 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, McIntosh, Mayes and 5 more2 hr
Mar 18, 9:26 AM CDTMesoscale DiscussionSPCChoctaw, McCurtain2 hr
Mar 18, 10:16 AM CDTTornado Watch PDSSPCChoctaw, LeFlore, McCurtain, Pushmataha7 hr
Mar 18, 12:10 PM CDTMesoscale DiscussionSPCChoctaw, LeFlore, McCurtain, Pushmataha2 hr
Mar 18, 1:51 PM CDTMesoscale DiscussionSPCBryan, Choctaw, LeFlore, McCurtain, Pushmataha3 hr
Mar 18, 5:19 PM CDTTornado WatchSPCMcCurtain11 hr
Mar 17, 9:17 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more58 min
Mar 17, 11:06 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more54 min
Mar 18, 1:32 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 9 more58 min
Mar 18, 1:43 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 9 more32 min
Mar 18, 1:52 AM CDTTornado WatchSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 34 more7 hr
Mar 18, 4:57 AM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Coryell, Gillespie, Hamilton and 7 more93 min
Mar 18, 7:22 AM CDTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Brazoria, Brazos and 40 more113 min
Mar 18, 7:50 AM CDTMesoscale DiscussionSPCBandera, Bosque, Brown, Burnet, Coleman, Comanche and 19 more55 min
Mar 18, 10:59 AM CDTTornado Watch PDSSPCAnderson, Angelina, Austin, Bastrop, Bell, Brazoria and 45 more8 hr
Mar 18, 1:19 PM CDTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Brazos, Burleson and 37 more116 min
Mar 18, 3:54 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bowie, Brazos, Burleson and 36 more2 hr
Mar 18, 6:19 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Chambers, Cherokee, Hardin, Harrison and 16 more56 min
Mar 18, 6:47 PM CDTTornado WatchSPCAnderson, Angelina, Chambers, Cherokee, Galveston, Hardin and 12 more9 hr

Nearby

Mesoscale Discussions in Oklahoma, 2008Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008

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.