Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 104
The Storm Prediction Center issued this mesoscale discussion at Feb 3, 2012, 5:41 PM CST for 14 counties in Oklahoma; 23 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 3, 2012, 5:41 PM CST (23:41 UTC)
- Expired
- Feb 3, 2012, 7:45 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Okfuskee County, OK, Pittsburg County, OK, Pontotoc County, OK, Seminole County, OK, Brown County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 82 km from the middle of the area, began a volume at 23:43 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 11.7 hours before the alert went out and 63 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
- 717 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 493 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 283 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
164
ACUS11 KWNS 032342
SWOMCD
SPC MCD 032341
OKZ000-TXZ000-040145-
MESOSCALE DISCUSSION 0104
NWS STORM PREDICTION CENTER NORMAN OK
0541 PM CST FRI FEB 03 2012
AREAS AFFECTED...PARTS OF N CENTRAL TX AND INTO S CENTRAL AND ERN OK
CONCERNING...TORNADO WATCH 25...
VALID 032341Z - 040145Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 25 CONTINUES.
BROAD ZONE OF CONVECTION CONTINUES ATTM ACROSS ERN PORTIONS OF THE
SRN PLAINS...WITH STRONGEST STORMS STILL CONFINED TO PARTS OF N
CENTRAL TX AND INTO ADJACENT S CENTRAL OK. HERE...AN ADVANCING COLD
FRONT CONTINUES TO FOCUS BANDS OF STORMS -- FUELED BY AMPLE
MIXED-LAYER CAPE AND AIDED BY 0-6 KM SHEAR SUPPORTIVE OF
ORGANIZED/ROTATING UPDRAFTS.
OVERALL HOWEVER...TORNADO POTENTIAL APPEARS TO BE DECREASING
GRADUALLY...AS LOW-LEVEL FLOW VEERS WITH TIME ACROSS THE AREA IN
CONJUNCTION WITH AN ANTICIPATED TREND TOWARD MORE LINEAR
ORGANIZATION. STILL...EXPECT MARGINAL HAIL WITH STRONGER
CELLS...ALONG WITH ONGOING POTENTIAL FOR LOCALIZED DAMAGING WIND
GUSTS.
STORMS ACROSS NERN PORTIONS OF THE WW CONTINUE NEARING THE ERN WATCH
BORDER. ATTM HOWEVER...LOCAL COUNTY EXTENSIONS OF THE WATCH MAY
SUFFICE WHERE NECESSARY...AS THE NEED FOR A NEW WW ISSUANCE LATER
THIS EVENING INTO SERN OK/NERN TX REMAINS UNCERTAIN DUE TO
POTENTIALLY LIMITED SEVERE THREAT.
..GOSS.. 02/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TSA...FWD...OUN...SJT...
LAT...LON 31949915 32889862 33679805 34929720 35649618 35129568
32459617 31499890 31569925 31949915SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 7:08 PM CST | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Custer and 13 more | 67 min |
| Feb 2, 7:38 PM CST | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more | 7 hr |
| Feb 2, 9:48 PM CST | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 11 more | 117 min |
| Feb 2, 11:44 PM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Comanche, Custer and 14 more | 91 min |
| Feb 3, 2:00 AM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 24 more | 60 min |
| Feb 3, 2:25 AM CST | Tornado Watch | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more | 8 hr |
| Feb 3, 7:15 AM CST | Mesoscale Discussion | SPC | Beckham, Caddo, Canadian, Comanche, Cotton, Custer and 8 more | 90 min |
| Feb 3, 9:42 AM CST | Mesoscale Discussion | SPC | Caddo, Comanche, Cotton, Greer, Harmon, Jackson and 3 more | 63 min |
| Feb 3, 11:59 AM CST | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more | 91 min |
| Feb 3, 12:26 PM CST | Tornado Watch | SPC | Atoka, Bryan, Carter, Comanche, Cotton, Garvin and 8 more | 8 hr |
| Feb 3, 3:17 PM CST | Mesoscale Discussion | SPC | Carter, Garvin, Jefferson, Johnston, Love, Marshall and 1 more | 88 min |
| Feb 3, 6:35 AM CST | Mesoscale Discussion | SPC | Jasper, Newton, Sabine, Tyler | 115 min |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion in 2012
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.