Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 808

May 7, 200831 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 7, 2008, 7:07 AM CDT for 31 counties in Oklahoma. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
May 7, 2008, 7:07 AM CDT (12:07 UTC)
Expired
May 7, 2008, 8:00 AM CDT
In force
53 min
Issued by
the Storm Prediction Center
All 31 counties

Atoka County, OK, Carter County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Norman radar (KTLX), 70 km from the middle of the area, began a volume at 12:10 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 12:00Z, 0.1 hours before the alert went out and 183 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 12:00Z on 2008-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1715 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 12:00Z on 2008-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
1715 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.8
Supercell composite
5.1

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 6, 8:50 PM CDTMesoscale DiscussionSPCBeckham, Custer, Ellis, Greer, Harmon, Jackson and 4 more85 min
May 6, 9:51 PM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Harmon, Jackson, Texas, Tillman7 hr
May 6, 9:59 PM CDTMesoscale DiscussionSPCWoods61 min
May 7, 12:04 AM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Ellis, Greer, Harmon and 5 more86 min
May 7, 2:47 AM CDTMesoscale DiscussionSPCBeckham, Caddo, Comanche, Cotton, Custer, Greer and 5 more58 min
May 7, 7:33 AM CDTSevere Thunderstorm WatchSPCAdair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 9 more5 hr
May 7, 9:52 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Coal, Craig, Creek and 22 more83 min
May 7, 1:33 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Cleveland, Coal, Cotton and 14 more6 hr
May 7, 3:13 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more2 hr
May 7, 4:47 PM CDTMesoscale DiscussionSPCHaskell, Latimer, LeFlore, McCurtain, Pushmataha88 min
May 7, 5:28 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 20 more8 hr
May 7, 6:35 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Johnston, Marshall55 min

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.