Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 732

May 4, 20035 counties in Oklahoma; 23 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 4, 2003, 2:16 PM CDT for 5 counties in Oklahoma; 23 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
May 4, 2003, 2:16 PM CDT (19:16 UTC)
Expired
May 4, 2003, 4:15 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
All 28 counties

Bryan County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Bosque County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 24 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 12 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 2003-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1425 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 2003-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 265 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
1425 J/kg
Mixed-layer CIN
-324 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
265 m²/s²
0-3 km storm-relative helicity
384 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
May 3, 8:05 PM CDTTornado WatchSPCBeckham, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more6 hr
May 3, 10:00 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Canadian, Comanche, Cotton and 12 more2 hr
May 4, 11:44 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Cherokee, Coal, Craig, Creek and 27 more3 hr
May 4, 12:35 PM CDTTornado WatchSPCAdair, Cherokee, Craig, Creek, Delaware, Haskell and 22 more6 hr
May 4, 3:00 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 6 more6 hr
May 4, 3:05 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Haskell, McIntosh and 9 more115 min
May 4, 4:43 PM CDTMesoscale DiscussionSPCCraig, Nowata, Ottawa2 hr
May 4, 5:20 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, LeFlore, Ottawa and 1 more55 min
May 4, 6:05 PM CDTTornado WatchSPCAdair, Cherokee, Craig, Delaware, Haskell, Latimer and 5 more7 hr
May 4, 6:28 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 5 more2 hr

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion in 2003

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.