Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 362

March 26, 201220 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2012, 3:14 PM CDT for 20 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 26, 2012, 3:14 PM CDT (20:14 UTC)
Expired
Mar 26, 2012, 5:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Andrews County, TX, Borden County, TX, Brewster County, TX, Crane County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Glasscock County, TX, Howard County, TX, Loving County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Presidio County, TX, Reagan County, TX, Reeves County, TX, Terry County, TX, Upton County, TX, Ward County, TX, Winkler County, TX

The radar

The Midland/Odessa radar (KMAF), 124 km from the middle of the area, began a volume at 20:14 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, 8.2 hours before the alert went out and 124 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-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 2012-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 86 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2012-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -82 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
86 J/kg
Mixed-layer CIN
-410 J/kg
Mixed-layer LCL
898 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-82 m²/s²
0-3 km storm-relative helicity
-50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

979 
ACUS11 KWNS 262014
SWOMCD
SPC MCD 262014 
TXZ000-NMZ000-262215-

MESOSCALE DISCUSSION 0362
NWS STORM PREDICTION CENTER NORMAN OK
0314 PM CDT MON MAR 26 2012

AREAS AFFECTED...FAR SERN NM...TX PERMIAN BASIN AND ERN TRANS-PECOS

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

VALID 262014Z - 262215Z

ISOLATED THUNDERSTORMS ARE FORECAST TO DEVELOP THIS AFTERNOON AND
EVENING OVER PORTIONS OF FAR SERN NM...THE TX PERMIAN BASIN AND ERN
TRANS-PECOS. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE
WITH THIS ACTIVITY...BUT THE THREAT WILL BE TOO LIMITED FOR A WW.

AFTERNOON SURFACE ANALYSIS INDICATES A WEAK DRYLINE EXTENDS SWD
THROUGH ERN NM INTO THE TX TRANS-PECOS. TEMPERATURES ALONG THIS
BOUNDARY ARE WARMING INTO THE 80S...WITH 40S TO LOW-MID 50S
DEWPOINTS PRESENT TO ITS E. STRONG HEATING AND MODEST LOW-LEVEL
MOISTURE COMBINED WITH STEEP MIDLEVEL LAPSE RATES /IN EXCESS OF 8 C
PER KM/ ARE CONTRIBUTING TOWARD WEAK TO MODERATE INSTABILITY...WITH
MLCAPE VALUES NEAR 1000 J/KG. CONTINUED BOUNDARY LAYER
DESTABILIZATION INVOF THE DRYLINE DURING THE REMAINDER OF THE
AFTERNOON...AS WELL AS GLANCING ASCENT ASSOCIATED WITH A SUBTLE VORT
MAX EMERGING OUT OF CNTRL NM WILL LIKELY AID IN ISOLATED
THUNDERSTORM DEVELOPMENT DURING THE NEXT FEW HRS...WHICH IS
SUPPORTED BY MULTIPLE RUNS OF THE HRRR. THOUGH VERTICAL WIND SHEAR
WILL NOT BE PARTICULARLY STRONG /I.E. 0-6 KM BULK WIND DIFFERENCE
FROM 20-30 KT/...10-20 KT E-SELY LOW-LEVEL FLOW WILL ENHANCE
STORM-RELATIVE INFLOW AND UPDRAFT STRENGTH BENEATH 30 KT MIDLEVEL
SWLYS. GIVEN THE PRESENCE OF STEEP MIDLEVEL LAPSE RATES...LARGE HAIL
WILL BE POSSIBLE. IN ADDITION...A WELL MIXED BOUNDARY LAYER LOCATED
ACROSS THE REGION ALSO SUGGESTS THERE IS SOME POTENTIAL FOR DAMAGING
WIND GUSTS.

..GARNER.. 03/26/2012

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

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

LAT...LON   29740439 32300365 33260227 32800117 31460136 29710263
            28980320 29740439

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 26, 5:33 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Crosby, Floyd, Garza and 7 more87 min

Nearby

Mesoscale Discussions in Texas, 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.