Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 755
The Storm Prediction Center issued this mesoscale discussion at May 7, 2012, 8:46 PM MDT for Eddy County, Lea County, New Mexico; 21 counties in Texas. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- May 7, 2012, 8:46 PM MDT (02:46 UTC)
- Expired
- May 7, 2012, 10:15 PM MDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 23 counties
Eddy County, NM, Lea County, NM, Andrews County, TX, Borden County, TX, Crane County, TX, Crockett County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Loving County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Reeves County, TX, Sterling County, TX, Terrell County, TX, Upton County, TX, Ward County, TX, Winkler County, TX
The radar
The Midland/Odessa radar (KMAF), 55 km from the middle of the area, began a volume at 02:48 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
Midland Regional, TX (KMAF), launched 00:00Z, 2.8 hours before the alert went out and 55 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
- 567 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1333 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -85 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -2.1
The text
As transmitted, in the capitals the NWS used until 2016.
516
ACUS11 KWNS 080247
SWOMCD
SPC MCD 080246
TXZ000-NMZ000-080415-
MESOSCALE DISCUSSION 0755
NWS STORM PREDICTION CENTER NORMAN OK
0946 PM CDT MON MAY 07 2012
AREAS AFFECTED...WRN TX...FAR SERN NM
CONCERNING...SEVERE THUNDERSTORM WATCH 264...
VALID 080246Z - 080415Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 264
CONTINUES.
SUMMARY...WW 264 IS SCHEDULED TO EXPIRE AT 04Z...BUT ELEVATED TSTMS
ARE EXPECTED TO BECOME MORE NUMEROUS INTO THE OVERNIGHT WITH A RISK
FOR AT LEAST MARGINALLY SEVERE HAIL. THE NEED FOR AN EXTENSION OR
ADDITIONAL WW IS UNCERTAIN.
DISCUSSION...MOST INTENSE CORE WITHIN WW 264 WAS LOCATED IN GAINES
COUNTY TX WITH A HISTORY OF SEVERE HAIL. FARTHER SW...A BROKEN LINE
OF CELLS HAS INTENSIFIED OFF THE HIGHER TERRAIN OF FAR W TX WITH
FAVORABLE LARGE-SCALE ASCENT GIVEN POST-FRONTAL UPSLOPE FLOW WITHIN
THE EXIT REGION OF A SUBTROPICAL JET OVER NRN MEXICO. GIVEN 40-50 KT
EFFECTIVE SHEAR...RISK FOR SEVERE HAIL WILL LIKELY BE GREATEST
DURING THIS INITIAL DEVELOPMENT. LATEST NAM/HRRR GUIDANCE SUGGEST
CONVECTIVE COVERAGE WILL INCREASE OVERNIGHT. WITH TIME...CELL
MERGERS/INTERACTIONS SHOULD LEAD TO DIFFICULTY IN MAINTAINING
ELEVATED SUPERCELL STRUCTURES AND CONSEQUENTLY MORE MARGINAL HAIL
POTENTIAL GIVEN MODEST ELEVATED BUOYANCY WITH MUCAPE AROUND 1000
J/KG.
..GRAMS.. 05/08/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...EWX...SJT...LUB...MAF...
LAT...LON 32490471 32900383 33060306 32950221 32820154 32400099
31380073 30530086 30010125 29810150 29840224 29870273
30220314 32490471SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 12:37 PM MDT | Mesoscale Discussion | SPC | Doña Ana, Grant, Luna, Otero, Sierra | 113 min |
| May 8, 1:07 PM MDT | Severe Thunderstorm Watch | SPC | Catron, Doña Ana, Grant, Hidalgo, Luna, Otero and 2 more | 7 hr |
| May 8, 3:53 PM MDT | Mesoscale Discussion | SPC | Catron, Doña Ana, Grant, Hidalgo, Luna, Otero and 2 more | 67 min |
| May 7, 6:39 PM MDT | Severe Thunderstorm Watch | SPC | Camp, Gregg, Harrison, Marion, Morris, Panola and 5 more | 4 hr |
| May 7, 6:54 PM MDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bee, Bexar, Brazos and 40 more | 66 min |
| May 7, 8:15 PM MDT | Mesoscale Discussion | SPC | Camp, Cass, Gregg, Harrison, Marion, Morris and 6 more | 60 min |
| May 8, 12:42 AM MDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Comal, Dimmit, Edwards and 13 more | 93 min |
| May 8, 9:44 AM MDT | Mesoscale Discussion | SPC | Bee, Brooks, Duval, Frio, Goliad, Jim Hogg and 11 more | 61 min |
| May 8, 9:58 AM MDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bee, Brooks, Calhoun, Cameron and 28 more | 8 hr |
| May 8, 2:03 PM MDT | Mesoscale Discussion | SPC | Cameron, Hidalgo, Starr, Willacy | 87 min |
| May 8, 4:47 PM MDT | Mesoscale Discussion | SPC | Cameron, Hidalgo, Kenedy, Willacy | 58 min |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in New Mexico, 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.