Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 396

April 5, 200317 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2003, 10:26 PM CST for 17 counties in Texas. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Apr 5, 2003, 10:26 PM CST (04:26 UTC)
Expired: Apr 5, 2003, 11:30 PM CST
In force: 64 min
Issued by: the Storm Prediction Center

Counties Baylor County, TX, Childress County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Shackelford County, TX, Stonewall County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 121 km from the middle of the area, began a volume at 04:26 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 4.4 hours before the alert went out and 223 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1777 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 373 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.

859 
ACUS11 KWNS 060426
SWOMCD
SPC MCD 060426 
TXZ000-OKZ000-060530-

MESOSCALE DISCUSSION 0396
NWS STORM PREDICTION CENTER NORMAN OK
1026 PM CST SAT APR 05 2003

AREAS AFFECTED...NWRN TX

CONCERNING...TORNADO WATCH 94...

VALID 060426Z - 060530Z

IF STORMS CAN DEVELOP WITHIN WW 94...PARAMETERS REMAIN FAVORABLE
FOR SUPERCELLS OVER THIS REGION AS THE AIR MASS CONTINUES TO
DESTABILIZE.  



LATEST SURFACE MESO-ANALYSIS AND OBJECTIVE ANALYSES SHOW THE WARM
FRONT CONTINUES TO LIFT SLOWLY NWD THROUGH NWRN TX...WITH THE
WARM FRONT/DRY LINE INTERSECTION IN THE VICINITY OF GARZA COUNTY.
 THE DRY LINE EXTENDS SWD THROUGH WRN TX TO SJT TO THE TX BIG
BEND AREA. AIR MASS IN THE WARM SECTOR REMAINS MODERATELY
UNSTABLE.  WIND FIELDS CONTINUE TO INCREASE OVER WRN/NWRN TX AS
AN UPPER SHORT WAVE TROUGH APPROACHES THE SRN HIGH
PLAINS...RESULTING IN SUFFICIENT DEEP LAYER SHEAR FOR SUPERCELLS.
 HOWEVER...LATEST MODELS SUGGEST THAT STORMS WILL NOT DEVELOP
UNTIL LATE TONIGHT /TOWARD 12Z/ AS LOW-LEVEL CONVERGENCE
INCREASES IN THE VICINITY OF A SURFACE LOW BETWEEN LBB-CDS AND
THE DRY LINE BEGINS TO SURGE EWD.



LOW-LEVEL MOISTURE WILL CONTINUE TO SPREAD NWWD INTO WW 94 AS
LOW-LEVEL SSELY WINDS STRENGTHEN...AND SUBSEQUENTLY DESTABILIZE
THE AIR MASS FURTHER NWWD INTO NWRN TX.  IF STORMS CAN DEVELOP
WITHIN THIS ENVIRONMENT...THEN SUPERCELLS WILL BE LIKELY...GIVEN
STRONG DEEP LAYER SHEAR. 

..PETERS.. 04/06/2003

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

ATTN...WFO...OUN...SJT...LUB...MAF...

34620040 34659991 34339926 33489919 32469926 32430021
33020099 34110097

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 5, 6:11 PM CST	Mesoscale Discussion	SPC	Baylor, Briscoe, Cottle, Crosby, Dickens, Floyd and 9 more	64 min
Apr 5, 6:35 PM CST	Mesoscale Discussion	SPC	Archer, Clay, Collin, Cooke, Dallas, Delta and 23 more	115 min
Apr 5, 6:40 PM CST	Tornado Watch	SPC	Briscoe, Childress, Cottle, Crosby, Dickens, Fisher and 16 more	5 hr
Apr 5, 8:04 PM CST	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Collin, Cooke, Dallas and 25 more	116 min
Apr 5, 9:20 PM CST	Mesoscale Discussion	SPC	Archer, Camp, Clay, Collin, Cooke, Dallas and 31 more	55 min
Apr 5, 9:35 PM CST	Tornado Watch	SPC	Archer, Bowie, Camp, Cass, Clay, Collin and 38 more	5 hr
Apr 5, 11:43 PM CST	Mesoscale Discussion	SPC	Archer, Camp, Clay, Collin, Cooke, Dallas and 31 more	92 min
Apr 6, 3:13 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Camp, Cass, Cherokee, Clay and 39 more	107 min
Apr 6, 3:39 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Camp, Cass, Cherokee, Clay and 39 more	66 min
Apr 6, 4:50 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Coke, Coleman and 27 more	115 min
Apr 6, 5:35 AM CDT	Severe Thunderstorm Watch	SPC	Wichita	4 hr
Apr 6, 9:12 AM CDT	Mesoscale Discussion	SPC	Anderson, Bosque, Camp, Cass, Cherokee, Collin and 41 more	2 hr
Apr 6, 10:20 AM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Harrison, Marion, Morris, Panola	55 min
Apr 6, 10:30 AM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 14 more	6 hr
Apr 6, 12:03 PM CDT	Mesoscale Discussion	SPC	Gregg, Harrison, Marion, Panola, Rusk	117 min
Apr 6, 12:40 PM CDT	Tornado Watch	SPC	Anderson, Brazos, Burleson, Cherokee, Collin, Cooke and 33 more	5 hr
Apr 6, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	Bowie, Delta, Lamar, Red River	5 hr
Apr 6, 3:00 PM CDT	Mesoscale Discussion	SPC	Anderson, Brazos, Cherokee, Delta, Freestone, Grimes and 21 more	90 min
Apr 6, 3:26 PM CDT	Mesoscale Discussion	SPC	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	2 hr
Apr 6, 3:45 PM CDT	Tornado Watch	SPC	Angelina, Gregg, Hardin, Harrison, Jasper, Liberty and 9 more	5 hr
Apr 6, 5:35 PM CDT	Mesoscale Discussion	SPC	Angelina, Gregg, Hardin, Harrison, Jasper, Liberty and 10 more	115 min
Apr 6, 6:23 PM CDT	Mesoscale Discussion	SPC	Newton, Sabine	97 min

Nearby

Mesoscale Discussions in Texas, 2003 Every 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.