Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 66
The Storm Prediction Center issued this mesoscale discussion at Feb 14, 2003, 7:37 PM CST for Little River County, Arkansas; 49 counties in Texas. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Feb 14, 2003, 7:37 PM CST (01:37 UTC)
- Expired
- Feb 14, 2003, 9:30 PM CST
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 50 counties
Little River County, AR, Anderson County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Camp County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Titus County, TX, Travis County, TX, Upshur County, TX, Van Zandt County, TX, Williamson County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 107 km from the middle of the area, began a volume at 01:40 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
Fort Worth, TX (KFWD), launched 00:00Z, 1.6 hours before the alert went out and 133 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.
- Mixed-layer CAPE
- 1504 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 757 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 150137 SWOMCD SPC MCD 150137 TXZ000-150330- MESOSCALE DISCUSSION 0066 NWS STORM PREDICTION CENTER NORMAN OK 0737 PM CST FRI FEB 14 2003 AREAS AFFECTED...N TX CONCERNING...SEVERE THUNDERSTORM WATCH 3... VALID 150137Z - 150330Z PER COORDINATION WITH FTW AND SHV...NRN HALF OF WW 003 WILL BE CANCELED. SRN PORTION OF WW REMAINS IN EFFECT UNTIL 05Z. ABSENCE OF SUSTAINED SURFACE CONVERGENCE HAS INHIBITED TSTM INITIATION ACROSS NRN PORTION OF WW 003...EVEN WITH FAVORABLE ENVIRONMENT --PER 00Z FWD SOUNDING. MOREOVER...CONVERGENCE ALONG WEAK DRYLINE/CONFLUENCE ZONE W DFW METROPLEX HAS WEAKENED OVER THE PAST HOUR. CURRENT THINKING IS THAT CONVECTION INITIATION MAY BE MORE LIKELY LATER TONIGHT --BETWEEN 04-06Z-- AS SURFACE COLD FRONT --CURRENTLY EXTENDING FROM N-CNTRL OK INTO THE SRN TX PNHDL-- MOVES INTO UNSTABLE AIRMASS IN PLACE ACROSS N/NERN TX. SRN PORTION OF WW 003 WILL REMAIN IN EFFECT UNTIL 05Z AS THIS AREA WILL REMAIN IN CLOSER PROXIMITY TO THE ELEVATED CONVECTION --ASSOCIATED WITH APPROACHING MID LEVEL SHORTWAVE-- MOVING OUT OF NRN MEXICO. THIS ACTIVITY MAY BE ABLE TO BECOME ROOTED IN THE BOUNDARY LAYER AS IT MOVES INTO THE INSTABILITY AXIS...CURRENTLY IN PLACE ACROSS THE SRN PART OF WW 003. ..MEAD/GOSS.. 02/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 30039783 30039908 31939792 33849676 33859545 33849414 31939536 30039657
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 14, 6:57 PM CST | Mesoscale Discussion | SPC | Little River | 2 hr |
| Feb 14, 11:09 PM CST | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 2 hr |
| Feb 14, 11:20 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 6 hr |
| Feb 15, 12:31 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 119 min |
| Feb 15, 3:15 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Sebastian, Washington | 60 min |
| Feb 14, 9:12 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Caldwell, Comal and 22 more | 2 hr |
| Feb 14, 10:16 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bee, Bell, Bexar and 40 more | 119 min |
| Feb 15, 4:12 AM CST | Mesoscale Discussion | SPC | Refugio | 3 hr |
| Feb 15, 4:35 AM CST | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 6 more | 4 hr |
| Feb 15, 6:48 AM CST | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 6 more | 87 min |
| Feb 15, 2:47 PM CST | Mesoscale Discussion | SPC | Atascosa, Bee, DeWitt, Goliad, Jim Wells, Karnes and 6 more | 118 min |
Nearby
Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Arkansas, 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.