Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 613
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2007, 7:43 AM CDT for 22 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2007, 7:43 AM CDT (12:43 UTC)
- Expired
- Apr 29, 2007, 10:45 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Andrews County, TX, Brewster County, TX, Crane County, TX, Crockett County, TX, Ector County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jeff Davis County, TX, Loving County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Presidio County, TX, Reagan County, TX, Reeves County, TX, Sterling County, TX, Terrell County, TX, Upton County, TX, Val Verde County, TX, Ward County, TX, Winkler County, TX
The radar
The Midland/Odessa radar (KMAF), 172 km from the middle of the area, began a volume at 12:43 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 nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 0.7 hours before the alert went out and 173 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
- 996 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 603 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 291244 SWOMCD SPC MCD 291243 TXZ000-NMZ000-291545- MESOSCALE DISCUSSION 0613 NWS STORM PREDICTION CENTER NORMAN OK 0743 AM CDT SUN APR 29 2007 AREAS AFFECTED...PORTIONS SW TX -- BIG BEND TO PERMIAN BASIN...EXTREME SERN NM CONCERNING...HEAVY RAINFALL VALID 291243Z - 291545Z POTENTIAL FOR HEAVY RAIN RATES 1-2 INCHES/HOUR -- ALREADY LOCALIZED ACROSS PORTIONS BREWSTER/PECOS COUNTIES -- IS EXPECTED TO BOTH SHIFT NWD ACROSS PERMIAN BASIN/LOWER PECOS VALLEY REGION AND REDEVELOP FARTHER S LATER THIS MORNING. MERGING/TRAINING OF CORES WILL ENHANCE THIS RISK...ESPECIALLY OVER CORRIDOR FROM MAF-INK AND SWD INTO BIG BEND TERRITORY. MULTIPLE EPISODES OF TSTMS ARE LIKELY THROUGH THIS MORNING AND BEYOND ACROSS THIS REGION AS WELL...WITH SVR POTENTIAL DESCRIBED IN LATEST SPC DAY-1 OUTLOOK. MAF RAOB HAS MOISTENED CONSIDERABLY DURING PAST 12 HOURS WITH 850 MB DEW POINT UP 10 DEG F TO 14 C...AND PW NEARLY 1.25 INCH. MOISTURE TRANSPORT IS EXPECTED TO CONTINUE ACROSS THIS REGION GIVEN LOW LEVEL THERMODYNAMIC PROFILE UPSTREAM ACROSS RIO GRANDE VALLEY AND ADJACENT MEX PIEDMONT...AS BASED ON 12Z DRT RAOB AND RUC FCST SOUNDINGS. CINH IS EXPECTED TO REMAIN RELATIVELY WEAK AS SFC DIABATIC HEATING FURTHER DESTABILIZES AIR MASS IN AREAS OF CLEARING...WITH 1000-1500 J/KG MLCAPE REDEVELOPING S OF I-10...AND MUCAPE APCHG 2000 J/KG AS FAR N AS I-20 EVEN AFTER INITIAL WAVE OF CONVECTION. IN ADDITION TO POTENTIAL FOR REDEVELOPMENT OF HEAVY RAIN PRODUCING TSTMS OVER NRN COAHUILA AND BIG BEND REGION...IMPENDING NEWD ACCELERATION OF MEX UPPER LOW AND ASSOCIATED NWD SPREAD OF RICH LOW LEVEL THETAE WILL CAUSE POTENTIAL TO COVER MORE OF W TX WITH TIME...AND POSSIBLY EXTREME SERN NM. ..EDWARDS.. 04/29/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...EWX...SJT...MAF... 32420329 32580151 32010093 30590082 29170076 29740140 29770173 29850230 29730259 28970311 29280395 29600445 29880463 30180467 30800460 31440421
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 12:59 AM CDT | Mesoscale Discussion | SPC | Dimmit, Kinney, Maverick, Zavala | 2 hr |
| Apr 29, 5:11 AM CDT | Mesoscale Discussion | SPC | Brewster, Crockett, Jeff Davis, Pecos, Presidio, Terrell and 2 more | 2 hr |
| Apr 29, 12:03 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Hudspeth, Jeff Davis and 6 more | 57 min |
| Apr 29, 12:34 PM CDT | Tornado Watch | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 7 hr |
| Apr 29, 3:12 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 63 min |
| Apr 29, 3:50 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Coke, Crosby, Dawson, Dickens and 21 more | 55 min |
| Apr 29, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | Baylor, Callahan, Coke, Coleman, Concho, Ector and 24 more | 6 hr |
| Apr 29, 6:34 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 20 more | 86 min |
Nearby
Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007
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.