Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 622
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2012, 4:17 PM MDT for 8 counties in New Mexico; 23 counties in Texas. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2012, 4:17 PM MDT (22:17 UTC)
- Expired
- Apr 29, 2012, 5:45 PM MDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 31 counties
Chaves County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Castro County, TX, Cochran County, TX, Crosby County, TX, Dawson County, TX, Deaf Smith County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX
The radar
The Cannon AFB radar (KFDX), 99 km from the middle of the area, began a volume at 22:21 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 hours before the alert went out and 189 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -99 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
930
ACUS11 KWNS 292218
SWOMCD
SPC MCD 292217
TXZ000-NMZ000-292345-
MESOSCALE DISCUSSION 0622
NWS STORM PREDICTION CENTER NORMAN OK
0517 PM CDT SUN APR 29 2012
AREAS AFFECTED...ERN NM...W TX...PORTIONS OF THE TX PANHANDLE
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 292217Z - 292345Z
ISOLATED TO SCATTERED THUNDERSTORM DEVELOPMENT IS FORECAST TO OCCUR
DURING THE LATE AFTERNOON INTO THE EVENING OVER ERN NM...W TX AND
PORTIONS OF THE TX PANHANDLE. LARGE HAIL AND DAMAGING WIND GUSTS
WILL BE THE PRIMARY SEVERE WEATHER THREATS. TRENDS WILL BE MONITORED
FOR POSSIBLE WW.
SURFACE ANALYSIS AT 22Z SHOWED A STATIONARY FRONT EXTENDING SWWD OUT
OF CNTRL OK INTO THE PERMIAN BASIN OF TX...AND THEN ARCS W-NWWD INTO
SRN/CNTRL NM. SELY UPSLOPE SURFACE WINDS ARE MAINTAINING MID TO UPR
50S DEWPOINTS OVER W TX...TO LOW/MID 40S DEWPOINTS IN ERN NM. THIS
MOISTURE COMBINED WITH TEMPERATURES IN THE 70S TO LOW 80S...AND
STEEP MIDLEVEL LAPSE RATES...ARE AIDING IN MLCAPE VALUES FROM
500-1500 J/KG ACROSS THE AREA. SURFACE OBJECTIVE ANALYSIS ALSO
INDICATES STRONG BOUNDARY LAYER DESTABILIZATION IS OCCURRING...WHICH
HAS LED TO THE DEVELOPMENT OF AN EXPANSIVE CUMULUS FIELD PER VISIBLE
SATELLITE IMAGERY. THESE TRENDS SHOULD RESULT IN ISOLATED TO
SCATTERED THUNDERSTORM DEVELOPMENT DURING THE NEXT FEW HRS. LATEST
HRRR SUGGESTS STORMS MAY DEVELOP FIRST OVER ERN NM...AND THEN SPREAD
EWD INTO W TX AND THE PANHANDLE. TCU PROFILER SHOWS 40-50 KT
MIDLEVEL W-SWLY FLOW ATOP S-SELY BOUNDARY LAYER FLOW...WHICH IS
YIELDING 0-6 KM BULK WIND DIFFERENCE VALUES FROM 50-60 KT. THUS...A
FEW SUPERCELLS WILL BE POSSIBLE...AND WILL POSE A THREAT FOR LARGE
HAIL AND DAMAGING WIND GUSTS.
..GARNER.. 04/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LUB...AMA...MAF...ABQ...
LAT...LON 32850138 32340212 32380330 33220482 34190522 35200502
35970390 35760190 34340091 32850138SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:13 AM MDT | Mesoscale Discussion | SPC | Curry, Quay, San Miguel | 92 min |
| Apr 29, 1:22 PM MDT | Mesoscale Discussion | SPC | Harding, Union | 113 min |
| Apr 29, 4:10 PM MDT | Severe Thunderstorm Watch | SPC | Union | 8 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in New Mexico, 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.