Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 482

April 9, 2012Eddy County, Lea County, New Mexico; 31 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2012, 6:33 PM MDT for Eddy County, Lea County, New Mexico; 31 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Apr 9, 2012, 6:33 PM MDT (00:33 UTC)
Expired: Apr 9, 2012, 7:30 PM MDT
In force: 57 min
Issued by: the Storm Prediction Center

All 33 counties

Eddy County, NM, Lea County, NM, Andrews County, TX, Borden County, TX, Cochran County, TX, Crane County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Ector County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Jeff Davis County, TX, Kent County, TX, Lamb County, TX, Loving County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Motley County, TX, Pecos County, TX, Reeves County, TX, Swisher County, TX, Terrell County, TX, Terry County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 49 km from the middle of the area, began a volume at 00:34 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, 0.6 hours before the alert went out and 48 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 617 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1776 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

648 
ACUS11 KWNS 100033
SWOMCD
SPC MCD 100033 
TXZ000-NMZ000-100130-

MESOSCALE DISCUSSION 0482
NWS STORM PREDICTION CENTER NORMAN OK
0733 PM CDT MON APR 09 2012

AREAS AFFECTED...WEST TX/SERN NM

CONCERNING...SEVERE THUNDERSTORM WATCH 152...153...

VALID 100033Z - 100130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
152...153...CONTINUES.

HIGH PLAINS INSTABILITY HAS YET TO BE OVERTURNED FROM THE SRN TX
PANHANDLE...SWWD INTO THE BIG BEND OF TX.  NUMEROUS MULTI-CELL TSTMS
WITH ISOLATED SUPERCELLS ARE MOVING SLOWLY SEWD WITHIN AN
ENVIRONMENT THAT REMAINS FAVORABLE FOR LARGE HAIL AND GUSTY WINDS. 
00Z SOUNDING FROM MAF REFLECTS THIS WELL WITH SBCAPE ON THE ORDER OF
1100 J/KG AND DEEP LAYER VERTICAL SHEAR ABOUT 35KT.  UNTIL THE
BOUNDARY LAYER COOLS AND LOW LEVEL LAPSE RATES WEAKEN THIS ACTIVITY
SHOULD MAINTAIN ITS STRENGTH.  HOWEVER UPDRAFTS SHOULD WEAKEN
CONSIDERABLY BY 04Z ALONG WITH AREAL COVERAGE.

..DARROW.. 04/10/2012

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

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

LAT...LON   30280440 32710441 34640173 33770021 31890185 30180194
            30280440

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 2:35 PM MDT	Mesoscale Discussion	SPC	Curry, Harding, Quay, Union	115 min
Apr 9, 7:54 PM MDT	Mesoscale Discussion	SPC	Foard, Hardeman, Wichita, Wilbarger	66 min
Apr 9, 11:25 PM MDT	Mesoscale Discussion	SPC	Brewster, Pecos, Presidio, Terrell	35 min
Apr 9, 11:52 PM MDT	Mesoscale Discussion	SPC	Baylor, Childress, Cottle, Foard, Hardeman, Knox and 1 more	23 min
Apr 10, 12:56 PM MDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Delta, Gregg, Harrison and 8 more	64 min

Nearby

Mesoscale Discussions in Texas, 2012 Mesoscale Discussions in New Mexico, 2012 Every 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.