Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 93, NWS Midland/Odessa, TX

April 30, 2012Brewster County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Apr 30, 2012, 5:24 PM CDT for Brewster County, Texas. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 30, 2012, 5:24 PM CDT (22:24 UTC)
Expired
Apr 30, 2012, 6:15 PM CDT
In force
51 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon

County Brewster County, TX

The radar

The Laughlin AFB radar (KDFX), 237 km from the middle of the area, began a volume at 22:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 30, 2:39 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.4 hours before the alert went out and 181 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, Del Rio, TX at 12:00Z on 2012-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2392 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, Del Rio, TX at 12:00Z on 2012-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
2392 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
586 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

457 
WUUS54 KMAF 302224
SVRMAF
TXC043-302315-
/O.NEW.KMAF.SV.W.0093.120430T2224Z-120430T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
524 PM CDT MON APR 30 2012

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BREWSTER COUNTY IN SOUTHWEST TEXAS...

* UNTIL 615 PM CDT

* AT 519 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 25 MILES
  NORTHEAST OF PERSIMMON GAP IN OPEN COUNTRY OF EAST CENTRAL BREWSTER
  COUNTY...OR 30 MILES SOUTHWEST OF SANDERSON...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT THE FOLLOWING LOCATIONS...
  OPEN COUNTRY OF EAST CENTRAL BREWSTER COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS... DEADLY CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. REMEMBER... IF YOU CAN
HEAR THUNDER... YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. SEEK
SAFE SHELTER NOW.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN TEXAS.

&&

LAT...LON 2971 10279 2984 10282 3018 10278 2989 10235
      2979 10240 2977 10255 2973 10262 2973 10265
      2973 10267 2968 10269 2965 10274
TIME...MOT...LOC 2222Z 249DEG 12KT 2979 10268

$$

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 5:20 AM CDTFire Weather WatchMAF8 hr
Apr 30, 5:20 AM CDTFire Weather WatchMAF49 hr
Apr 30, 1:19 PM CDTRed Flag WarningMAF32 hr
Apr 30, 2:30 PM CDTSevere Thunderstorm WarningMAFPecos60 min
Apr 30, 3:28 PM CDTSevere Thunderstorm WarningMAFBrewster, Jeff Davis, Pecos62 min
Apr 30, 4:09 PM CDTSevere Thunderstorm WarningMAFBrewster66 min
Apr 30, 4:31 PM CDTSevere Thunderstorm WarningMAFBrewster, Pecos59 min
Apr 30, 4:38 PM CDTSevere Thunderstorm WarningMAFBrewster52 min
Apr 30, 5:04 PM CDTSevere Thunderstorm WarningMAFBorden, Scurry56 min
Apr 30, 5:16 PM CDTSevere Thunderstorm WarningMAFBrewster59 min
Apr 30, 5:57 PM CDTSevere Thunderstorm WarningMAFBorden, Scurry63 min
Apr 30, 5:59 PM CDTAreal Flood AdvisoryMAFBrewster3 hr
Apr 30, 6:16 PM CDTSevere Thunderstorm WarningMAFBrewster39 min
Apr 30, 6:17 PM CDTSevere Thunderstorm WarningMAFHoward, Martin58 min
Apr 30, 6:40 PM CDTSevere Thunderstorm WarningMAFBorden, Scurry65 min
Apr 30, 6:52 PM CDTFlash Flood WarningMAFBorden, Scurry3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning 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.