Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 310

April 9, 20048 counties in Oklahoma; 22 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2004, 9:25 PM CDT for 8 counties in Oklahoma; 22 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2004, 9:25 PM CDT (02:25 UTC)
Expired
Apr 9, 2004, 11:00 PM CDT
In force
95 min
Issued by
the Storm Prediction Center
All 30 counties

Beckham County, OK, Comanche County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Washita County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Lamb County, TX, Motley County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX, Wilbarger County, TX

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 315 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, Norman, OK at 00:00Z on 2004-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 181 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, Norman, OK at 00:00Z on 2004-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
181 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1174 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

150 
ACUS11 KWNS 100226
SWOMCD
SPC MCD 100225 
OKZ000-TXZ000-NMZ000-100400-

MESOSCALE DISCUSSION 0310
NWS STORM PREDICTION CENTER NORMAN OK
0925 PM CDT FRI APR 09 2004

AREAS AFFECTED...SRN TX PANHANDLE/NWRN TX INTO SWRN OK

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 100225Z - 100400Z

ISOLATED SEVERE HAIL WILL BE POSSIBLE DURING THE NEXT FEW HOURS
ACROSS THE SRN TX PANHANDLE.  ADDITIONAL ELEVATED STORMS ARE LIKELY
THROUGH 06Z ACROSS THE AREA OF CONCERN.

02Z SURFACE ANALYSIS/IR SATELLITE IMAGERY SHOWS A QUASI-STATIONARY
BOUNDARY EXTENDING FROM 10 SW CSM TO 45 WNW CDS...THEN NWWD TO 20
ENE TCC.  STRONG SURFACE PRESSURE RISES /4-6 MB PER 2 HR/ ARE IN THE
WAKE OF A COLD FRONT SURGING SWD WITH THE LEADING EDGE OF THIS FRONT
LOCATED 15 MILES TO THE NORTH OF THE QUASI-STATIONARY BOUNDARY. 
REGIONAL RADARS SHOW STORMS HAVE DEVELOPED ALONG THE STATIONARY
BOUNDARY...AND MAY BE SLIGHTLY ELEVATED GIVEN THE LOSS OF DAY TIME
HEATING RESULTING IN AN INCREASE IN CONVECTIVE INHIBITION.  25 KT
SWLY LLJ PER LUBBOCK VAD IS PROVIDING STRONG LOW-LEVEL CONVERGENCE
ALONG THE SURFACE BOUNDARIES...WHILE LARGE SCALE ASCENT CONTINUES TO
INCREASE ACROSS THIS REGION AHEAD OF A SHORT WAVE TROUGH MOVING SEWD
FROM NM.  ALTHOUGH INSTABILITY IS DECREASING...INCREASING CLOUD
LAYER SHEAR IS EXPECTED TO COMPENSATE TO SUPPORT ISOLATED ELEVATED
SUPERCELLS ACROSS THE SRN TX PANHANDLE INTO SWRN OK AS THE COLD
FRONT MOVES SWD.

..PETERS.. 04/10/2004

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

ATTN...WFO...OUN...LUB...AMA...ABQ...

35759909 35250008 35200079 35370147 35770247 35280294
34780304 33930303 33700179 33659988 33939874 34729832

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 7:02 PM CDTMesoscale DiscussionSPCAdair, Atoka, Blaine, Bryan, Caddo, Canadian and 38 more58 min
Apr 9, 7:40 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Choctaw, Coal, McCurtain, Pushmataha5 hr
Apr 9, 10:06 PM CDTMesoscale DiscussionSPCBryan, Choctaw54 min
Apr 9, 11:57 PM CDTMesoscale DiscussionSPCBryan, Choctaw63 min
Apr 10, 5:57 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more93 min
Apr 10, 9:08 AM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 21 more2 hr
Apr 10, 10:20 AM CDTSevere Thunderstorm WatchSPCBandera, Bastrop, Bell, Bexar, Blanco, Bosque and 33 more6 hr
Apr 10, 12:43 PM CDTMesoscale DiscussionSPCBandera, Bastrop, Bell, Bexar, Blanco, Burleson and 26 more2 hr
Apr 10, 2:50 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Franklin and 10 more115 min
Apr 10, 2:50 PM CDTSevere Thunderstorm WatchSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bexar and 52 more5 hr
Apr 10, 3:25 PM CDTSevere Thunderstorm WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more6 hr
Apr 10, 5:38 PM CDTMesoscale DiscussionSPCHardin, Jasper, Jefferson, Newton, Orange, Tyler2 hr
Apr 10, 6:09 PM CDTMesoscale DiscussionSPCAtascosa, Austin, Bee, Brazoria, Colorado, DeWitt and 17 more96 min
Apr 10, 6:30 PM CDTSevere Thunderstorm WatchSPCJasper, Jefferson, Newton, Orange5 hr

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.