Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 762

May 8, 2012Doña Ana County, Otero County, New Mexico; 9 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2012, 6:34 PM MDT for Doña Ana County, Otero County, New Mexico; 9 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 8, 2012, 6:34 PM MDT (00:34 UTC)
Expired: May 8, 2012, 7:30 PM MDT
In force: 56 min
Issued by: the Storm Prediction Center

Counties Doña Ana County, NM, Otero County, NM, Brewster County, TX, Culberson County, TX, El Paso County, TX, Hudspeth County, TX, Jeff Davis County, TX, Pecos County, TX, Presidio County, TX, Reeves County, TX, Terrell County, TX

The radar

The Midland/Odessa radar (KMAF), 196 km from the middle of the area, began a volume at 00:35 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 195 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

689 
ACUS11 KWNS 090034
SWOMCD
SPC MCD 090034 
TXZ000-NMZ000-090130-

MESOSCALE DISCUSSION 0762
NWS STORM PREDICTION CENTER NORMAN OK
0734 PM CDT TUE MAY 08 2012

AREAS AFFECTED...FAR W TX...SRN NM

CONCERNING...SEVERE THUNDERSTORM WATCH 268...

VALID 090034Z - 090130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 268
CONTINUES.

SUMMARY...SEVERE THREAT HAS DIMINISHED WITHIN MOST OF WW 268 AND
APPEARS MARGINAL OVER REMAINING SRN PORTION IN W TX. AN ADDITIONAL
WW IS NOT ANTICIPATED AND PARTS OF THE WATCH COULD BE CANCELLED
EARLY.

DISCUSSION...NUMEROUS SHOWERS AND TSTMS HAVE EFFECTIVELY OVERTURNED
A LARGE PART OF WW 268 WITH DIMINISHING REFLECTIVITY/LIGHTNING
TRENDS NOTED. A THREAT FOR MARGINALLY SEVERE HAIL MAY PERSIST FOR
THE NEXT HOUR OR SO INVOF THE BIG BEND WHERE A POCKET OF WEAK
INSTABILITY IS LIKELY PRESENT. WITH MINIMAL INSTABILITY SAMPLED IN
DOWNSTREAM AIR MASS PER 00Z DRT/MAF RAOBS...THE SPATIOTEMPORAL
EXTENT OF THE HAIL THREAT SHOULD BE LIMITED.

..GRAMS.. 05/09/2012

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

ATTN...WFO...EWX...SJT...MAF...EPZ...

LAT...LON   30870187 30120143 28800309 29760479 32360704 32720648
            32680572 31600368 30870187

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 10:56 AM MDT	Mesoscale Discussion	SPC	Doña Ana, Grant, Hidalgo, Luna	2 hr

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.