Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 313

April 10, 20047 counties in Arkansas; 15 counties in Oklahoma; Lamar County, Red River County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2004, 5:57 AM CDT for 7 counties in Arkansas; 15 counties in Oklahoma; Lamar County, Red River County, Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2004, 5:57 AM CDT (10:57 UTC)
Expired
Apr 10, 2004, 7:30 AM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 24 counties

Howard County, AR, Little River County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Lamar County, TX, Red River County, TX

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 11.0 hours before the alert went out and 200 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.

156 
ACUS11 KWNS 101057
SWOMCD
SPC MCD 101057 
ARZ000-TXZ000-OKZ000-101230-

MESOSCALE DISCUSSION 0313
NWS STORM PREDICTION CENTER NORMAN OK
0557 AM CDT SAT APR 10 2004

AREAS AFFECTED...SERN OK INTO SWRN AR AND FAR NERN TX

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 101057Z - 101230Z

POTENTIAL FOR ISOLATED LARGE HAIL WILL EXIST WITH STRONGEST STORMS
THROUGH 13 OR 14Z. WW IS NOT ANTICIPATED.

TSTMS HAVE SLOWLY INCREASED IN COVERAGE AND INTENSITY OVER THE PAST
COUPLE OF HOURS FROM SWRN/CNTRL OK EWD/SEWD ACROSS THE SERN PART OF
THE STATE INTO FAR NERN TX AND WRN AR. THE STORMS FROM AROUND PRX
NEWD INTO W-CNTRL AR APPEAR TO BE ASSOCIATED WITH ISENTROPIC ASCENT
REGIME ALONG 30-35KT SWLY LLJ. TO THE W...FORCING FOR ASCENT ON
ERN/SERN PERIPHERY OF VORTICITY MAX TRANSLATING ACROSS N-CNTRL OK
APPEARS TO SUSTAINING STORMS OVER THE CNTRL PART OF THE STATE.

LATEST RUC DIAGNOSTIC FIELDS SUGGEST THAT AIRMASS IMMEDIATELY ABOVE
FRONTAL INVERSION IS ONLY WEAKLY UNSTABLE THIS MORNING WITH MUCAPES
OF 300-800 J/KG. HOWEVER...TIME/HEIGHT TRENDS FROM THE PURCELL OK
PROFILER SUGGEST THE DEEP-LAYER SHEAR THROUGH THE BUOYANCY LAYER HAS
INCREASED CONSIDERABLY OVER THE PAST COUPLE OF HOURS...LIKELY IN
RESPONSE TO N-CNTRL OK VORTICITY MAX. ADDITIONAL STRENGTHENING OF
ONGOING TSTMS WILL POSSIBLE FOR THE NEXT FEW HOURS...ESPECIALLY S OF
I-40 AND E OF I-35 WHERE THE GREATEST INSTABILITY WILL REMAIN
FOCUSED ALONG LLJ AXIS. GIVEN THE STRENGTHENING SHEAR PROFILES...A
FEW STORMS MAY EXHIBIT SUPERCELL STRUCTURES WITH THE POTENTIAL TO
PRODUCE LARGE HAIL. A WW IS NOT ANTICIPATED AS SEVERE WEATHER THREAT
SHOULD REMAIN ISOLATED.

..MEAD.. 04/10/2004

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

ATTN...WFO...LZK...SHV...TSA...FWD...OUN...

34689715 35379627 35349526 35209416 34389354 33599374
33529431 33709698

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 7:02 PM CDTMesoscale DiscussionSPCCrawford, Franklin, Garland, Hempstead, Howard, Johnson and 9 more58 min
Apr 9, 7:40 PM CDTSevere Thunderstorm WatchSPCClark, Dallas, Garland, Grant, Hempstead, Hot Spring and 10 more5 hr
Apr 9, 10:06 PM CDTMesoscale DiscussionSPCClark, Dallas, Grant, Hempstead, Hot Spring, Howard and 5 more54 min
Apr 9, 11:57 PM CDTMesoscale DiscussionSPCHempstead, Little River, Nevada, Sevier63 min
Apr 10, 2:50 PM CDTMesoscale DiscussionSPCAshley, Chicot, Columbia, Lafayette, Miller, Union115 min
Apr 10, 3:25 PM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Chicot, Columbia, Desha and 5 more6 hr
Apr 9, 9:25 PM CDTMesoscale DiscussionSPCBeckham, Comanche, Greer, Harmon, Jackson, Kiowa and 2 more95 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 CDTSevere Thunderstorm WatchSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bexar and 52 more5 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 Oklahoma, 2004Mesoscale Discussions in Arkansas, 2004Mesoscale Discussions in Texas, 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.