Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 471

April 6, 201226 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2012, 5:55 PM CDT for 26 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 6, 2012, 5:55 PM CDT (22:55 UTC)
Expired: Apr 6, 2012, 8:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Lubbock County, TX, Moore County, TX, Motley County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Stonewall County, TX, Swisher County, TX

The radar

The Amarillo radar (KAMA), 69 km from the middle of the area, began a volume at 22:54 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.9 hours before the alert went out and 68 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: 887 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 409 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.

114 
ACUS11 KWNS 062256
SWOMCD
SPC MCD 062255
TXZ000-070100-

MESOSCALE DISCUSSION 0471
NWS STORM PREDICTION CENTER NORMAN OK
0555 PM CDT FRI APR 06 2012

AREAS AFFECTED...TX PANHANDLE

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 062255Z - 070100Z

A THREAT FOR HAIL AND STRONG WIND GUSTS MAY DEVELOP WITHIN THE NEXT
1-2 HRS OVER PORTIONS OF THE TX PANHANDLE. ISOLATED NATURE OF THE
THREAT SHOULD PRECLUDE THE NEED FOR A WW.

SATELLITE IMAGERY DEPICTS AN INCREASINGLY AGITATED CU FIELD INVOF A
DRYLINE LOCATED ALONG A LINE FROM DHT TO LBB. TEMPERATURES HAVE
REACHED INTO THE 70S WITH SBCAPE VALUES A0A 1000 J/KG. HOWEVER...
CIN REMAINS ACROSS MOST OF THE AREA. THE ONLY EXCEPTION IS ACROSS
THE FAR NRN TX PANHANDLE WHERE WINDS ARE SELY AND DEWPOINTS ARE IN
THE 50S. AS A RESULT...CONVECTIVE INITIATION REMAINS QUESTIONABLE.
WITH ANY STORMS THAT DO DEVELOP...EFFECTIVE SHEAR A0A 35 KTS
SUGGESTS STORM ORGANIZATION IS POSSIBLE WITH THE PRIMARY THREATS OF
HAIL AND STRONG WINDS.

..MOSIER.. 04/06/2012

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

ATTN...WFO...LUB...AMA...

LAT...LON   35290045 34550025 34080021 33630015 33190016 33030041
            33040080 33140140 33600183 34290219 35010254 35480260
            35910250 36370202 36460148 36460121 36330093 35970061
            35290045

Nearby

Mesoscale Discussions in Texas, 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.