Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1122

June 6, 20049 counties in Oklahoma; 46 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2004, 5:39 PM CDT for 9 counties in Oklahoma; 46 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jun 6, 2004, 5:39 PM CDT (22:39 UTC)
Expired
Jun 6, 2004, 8:15 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 55 counties

Bryan County, OK, Carter County, OK, Cotton County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Archer County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Glasscock County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Howard County, TX, Irion County, TX, Jack County, TX, Johnson County, TX, Martin County, TX, McCulloch County, TX, Midland County, TX, Mills County, TX, Mitchell County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Reagan County, TX, Rockwall County, TX, Runnels County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Tarrant County, TX, Tom Green County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.7 hours before the alert went out and 175 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 2004-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 2004-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -124 square meters per square second.1939Sfc1 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
127 J/kg
Mixed-layer CIN
-310 J/kg
Mixed-layer LCL
1465 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-124 m²/s²
0-3 km storm-relative helicity
-158 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.

032 
ACUS11 KWNS 062240
SWOMCD
SPC MCD 062239 
OKZ000-TXZ000-070115-

MESOSCALE DISCUSSION 1122
NWS STORM PREDICTION CENTER NORMAN OK
0539 PM CDT SUN JUN 06 2004

AREAS AFFECTED...NRN/CENTRAL TX...SRN OK

CONCERNING...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAINFALL 

VALID 062239Z - 070115Z

CONVECTIVE CLUSTER OVER NRN TX WILL CONTINUE TO MOVE SLOWLY NWD OVER
THE NEXT FEW HOURS INTO SCENTRAL/SERN OK. ADDITIONAL STORM
DEVELOPMENT WILL BE POSSIBLE FROM THE DFW METRO AREA TOWARDS ACT.
ISOLATED DAMAGING WINDS AND LARGE HAIL WILL BE POSSIBLE WITH THE
STRONGEST STORMS OVER THIS AREA. ADDITIONAL ISOLATED SVR THREAT WILL
BE POSSIBLE ALONG OUTFLOW BOUNDARY EXTENDING FROM NEAR MAF EWD TO
NEAR SJT.

INCREASING LOW LEVEL FLOW WILL AID IN NWD MOVEMENT OF THE OUTFLOW
BOUNDARY/NEW CONVECTIVE DEVELOPMENT ON THE NORTH SIDE OF CONVECTIVE
CLUSTER INTO A MODERATELY UNSTABLE AIRMASS OVER SCENTRAL/SERN OK
WHERE MLCAPES FROM 2000-2500 J/KG EXIST. MEANWHILE 35-40 KT LOW
LEVEL JET DEVELOPING OVER NRN/CENTRAL TX WILL AID IN THE POTENTIAL
FOR REDEVELOPMENT/BACKBUILDING SOUTH OF THE CURRENT CONVECTIVE
CLUSTER BACK INTO NCENTRAL TX. THIS WILL AID TRAINING OF ECHOES AND
THE POTENTIAL FOR HEAVY RAINFALL RATES OVER NCENTRAL TX/SCENTRAL OK
GIVEN THE MOIST AIRMASS IN PLACE.

WARM MID LEVELS AND MULTICELLULAR NATURE OF CONVECTION GIVEN THE
WEAK SHEAR OVER NRN TX/SRN OK AND BETWEEN MAF AND SJT WOULD LIMIT A
PROLONGED/WELL ORGANIZED SEVERE THREAT AND THUS A WW IS NOT
ANTICIPATED.

..CROSBIE.. 06/06/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...TSA...FWD...OUN...SJT...MAF...

31180134 31970234 32400213 32480125 32250057 32000030
32409960 33349899 34399857 34719789 34469657 34339571
33669579 32219663 31689724 31059928

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 5, 7:48 PM CDTMesoscale DiscussionSPCBeaver, Cimarron, Harper, Texas57 min
Jun 5, 9:51 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more54 min
Jun 6, 2:07 PM CDTMesoscale DiscussionSPCBryan, Carter, Johnston, Love, Marshall, Murray113 min
Jun 6, 3:29 PM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Kingfisher, Major and 1 more2 hr
Jun 5, 11:45 PM CDTSevere Thunderstorm WatchSPCCallahan, Coke, Coleman, Eastland, Fisher, Haskell and 10 more5 hr
Jun 6, 1:40 AM CDTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Callahan and 34 more95 min

Nearby

Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Oklahoma, 2004Every mesoscale discussion in 2004

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.