Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 693

April 29, 200623 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2006, 10:05 AM CDT for 23 counties in Oklahoma; 8 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2006, 10:05 AM CDT (15:05 UTC)
Expired
Apr 29, 2006, 12:00 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 31 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, Love County, OK, Marshall 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, Pushmataha County, OK, Seminole County, OK, Collin County, TX, Cooke County, TX, Delta County, TX, Fannin County, TX, Grayson County, TX, Hunt County, TX, Lamar County, TX, Montague County, TX

The radar

The Norman radar (KTLX), 127 km from the middle of the area, began a volume at 15:07 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

Fort Worth, TX (KFWD), launched 12:00Z, 3.1 hours before the alert went out and 184 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, Fort Worth, TX at 12:00Z on 2006-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Fort Worth, TX at 12:00Z on 2006-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939587897117136Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
667 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 28, 8:44 PM CDTMesoscale DiscussionSPCBryan, Carter, Choctaw, Jefferson, Johnston, Love and 1 more91 min
Apr 28, 11:08 PM CDTTornado WatchSPCChoctaw, McCurtain, Pushmataha7 hr
Apr 29, 4:03 AM CDTMesoscale DiscussionSPCChoctaw, McCurtain, Pushmataha57 min
Apr 29, 12:47 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Haskell, Latimer, LeFlore and 7 more8 hr
Apr 29, 2:34 PM CDTMesoscale DiscussionSPCLeFlore86 min
Apr 28, 7:43 PM CDTTornado WatchSPCBandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 33 more6 hr
Apr 28, 10:03 PM CDTMesoscale DiscussionSPCAnderson, Bastrop, Brazos, Burleson, Camp, Cass and 32 more87 min
Apr 28, 11:14 PM CDTMesoscale DiscussionSPCBandera, Bexar, Edwards, Frio, Kendall, Kerr and 5 more91 min
Apr 29, 1:51 AM CDTMesoscale DiscussionSPCAtascosa, Austin, Bastrop, Bell, Bexar, Brazos and 24 more24 min
Apr 29, 1:58 AM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 18 more3 hr
Apr 29, 6:04 AM CDTTornado WatchSPCAngelina, Bowie, Brazoria, Camp, Cass, Chambers and 33 more7 hr
Apr 29, 7:37 AM CDTMesoscale DiscussionSPCAngelina, Bowie, Brazoria, Cass, Chambers, Galveston and 21 more83 min
Apr 29, 9:57 AM CDTMesoscale DiscussionSPCChambers, Hardin, Jefferson, Newton, Orange2 hr
Apr 29, 11:55 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 15 more65 min

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.