Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 508

March 31, 200822 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2008, 1:17 AM CDT for 22 counties in Oklahoma. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2008, 1:17 AM CDT (06:17 UTC)
Expired
Mar 31, 2008, 2:45 AM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 22 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 83 km from the middle of the area, began a volume at 06:16 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

Lamont, OK (KLMN), launched 00:00Z, 6.3 hours before the alert went out and 84 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, Lamont, OK at 00:00Z on 2008-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1597 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, Lamont, OK at 00:00Z on 2008-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 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
1597 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
855 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
252 m²/s²
Significant tornado parameter
2.1
Supercell composite
10.5

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 30, 8:50 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Canadian, Custer, Garfield, Grant and 4 more55 min
Mar 30, 10:52 PM CDTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 16 more6 hr
Mar 31, 2:52 AM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Logan, Noble, Osage and 2 more53 min
Mar 31, 4:00 AM CDTMesoscale DiscussionSPCPawnee90 min
Mar 31, 4:29 AM CDTMesoscale DiscussionSPCCraig, Creek, Kay, Mayes, Nowata, Osage and 5 more91 min
Mar 31, 5:05 AM CDTSevere Thunderstorm WatchSPCCraig, Mayes, Nowata, Osage, Pawnee, Rogers and 2 more7 hr
Mar 31, 6:17 AM CDTMesoscale DiscussionSPCCraig, Delaware, Kay, Mayes, Nowata, Osage and 6 more88 min
Mar 31, 7:50 AM CDTMesoscale DiscussionSPCBlaine, Craig, Garfield, Kay, Kingfisher, Logan and 9 more85 min
Mar 31, 8:44 AM CDTTornado WatchSPCAdair, Caddo, Canadian, Cherokee, Cleveland, Coal and 37 more7 hr
Mar 31, 10:30 AM CDTMesoscale DiscussionSPCAdair, Caddo, Canadian, Cherokee, Cleveland, Coal and 37 more60 min
Mar 31, 12:20 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cotton, Jefferson and 4 more55 min
Mar 31, 2:00 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Jefferson, Johnston and 3 more7 hr
Mar 31, 3:04 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Coal, Haskell, Hughes, Latimer and 6 more26 min
Mar 31, 3:45 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Coal, Haskell, Hughes and 8 more7 hr
Mar 31, 3:49 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Jefferson, Johnston and 3 more56 min
Mar 31, 6:12 PM CDTTornado WatchSPCMcCurtain7 hr

Nearby

Mesoscale Discussions in Oklahoma, 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.