Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 97, NWS Midland/Odessa, TX

April 30, 2012Borden County, Scurry County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Apr 30, 2012, 6:40 PM CDT for Borden County, Scurry County, Texas. It was in force for 65 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 30, 2012, 6:40 PM CDT (23:40 UTC)
Expired: Apr 30, 2012, 7:45 PM CDT
In force: 65 min
Issued by: NWS Midland/Odessa, TX
Area: Storm-based polygon

Counties Borden County, TX, Scurry County, TX

The radar

The Lubbock radar (KLBB), 128 km from the middle of the area, began a volume at 23:40 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.

What was reported inside it

Time	Report	Where
Apr 30, 6:41 PM CDT	HAIL 2.5	6 S Fluvanna, TX
Apr 30, 6:41 PM CDT	HAIL 2.75	6 S Fluvanna, TX
Apr 30, 6:50 PM CDT	HAIL 2.5	Fluvanna, TX
Apr 30, 7:12 PM CDT	HAIL 1.5	6 S Fluvanna, TX
Apr 30, 7:40 PM CDT	TSTM WND GST 77	3 Wnw Fluvanna, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 30, 2:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.7 hours before the alert went out and 144 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: 1590 J/kg
Mixed-layer CIN: -246 J/kg
Mixed-layer LCL: 1149 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 184 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.

039 
WUUS54 KMAF 302340
SVRMAF
TXC033-415-010045-
/O.NEW.KMAF.SV.W.0097.120430T2340Z-120501T0045Z/

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

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SCURRY COUNTY IN WEST TEXAS...
  NORTHEASTERN BORDEN COUNTY IN WEST TEXAS...

* UNTIL 745 PM CDT

* AT 638 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING BASEBALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ARAH...OR 12 MILES WEST OF SNYDER...MOVING SOUTHEAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT THE FOLLOWING LOCATIONS...
  RANDALLS CORNER...
  UNION...
  KNAPP...
  IRA...
  SNYDER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE AND DAMAGING HAIL. IF 
YOU ARE IN THE PATH OF THIS STORM... TAKE IMMEDIATE ACTION TO 
PROTECT LIFE AND PROPERTY.

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

&&

LAT...LON 3265 10067 3257 10103 3263 10123 3296 10131
      3296 10097
TIME...MOT...LOC 2340Z 336DEG 6KT 3277 10111

$$

2 follow-up statements

778 
WWUS54 KMAF 302347
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
647 PM CDT MON APR 30 2012

TXC033-415-010045-
/O.CON.KMAF.SV.W.0097.000000T0000Z-120501T0045Z/
SCURRY TX-BORDEN TX-
647 PM CDT MON APR 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN BORDEN AND SCURRY COUNTIES...

AT 643 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING BASEBALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ARAH...OR ABOUT 15 MILES NORTHWEST OF SNYDER...MOVING
SOUTH AT 5 MPH.

SOME LOCATIONS AFFECTED BY THE SEVERE THUNDERSTORM INCLUDE...ARAH...
RANDALLS CORNER...UNION AND KNAPP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AT 641 PM CDT...TENNIS BALL SIZE HAIL WAS REPORTED 6 MILES SOUTH OF 
FLUVANNA. IF YOU ARE IN THE PATH OF THIS STORM... TAKE IMMEDIATE 
ACTION TO PROTECT LIFE AND PROPERTY.

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

&&

LAT...LON 3265 10067 3257 10103 3263 10123 3296 10131
      3296 10097
TIME...MOT...LOC 2347Z 341DEG 3KT 3281 10114

$$

837 
WWUS54 KMAF 010026
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
726 PM CDT MON APR 30 2012

TXC033-415-010045-
/O.CON.KMAF.SV.W.0097.000000T0000Z-120501T0045Z/
SCURRY TX-BORDEN TX-
726 PM CDT MON APR 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN BORDEN AND SCURRY COUNTIES...

AT 724 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING BASEBALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ARAH...OR ABOUT 15 MILES NORTHWEST OF SNYDER. THIS STORM
WAS NEARLY STATIONARY.

SOME LOCATIONS AFFECTED BY THE SEVERE THUNDERSTORM INCLUDE...
DERMOTT...ARAH AND RANDALLS CORNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AT 712 PM CDT...PING PONG BALL SIZE HAIL WAS REPORTED 6 MILES SOUTH 
OF FLUVANNA. IF YOU ARE IN THE PATH OF THIS STORM... TAKE IMMEDIATE 
ACTION TO PROTECT LIFE AND PROPERTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT
TUESDAY MORNING FOR WEST TEXAS. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY EVENING FOR SOUTHWESTERN
TEXAS.

&&

LAT...LON 3265 10067 3257 10103 3263 10123 3296 10131
      3296 10097
TIME...MOT...LOC 0025Z 337DEG 1KT 3282 10114

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 5:20 AM CDT	Fire Weather Watch	MAF		8 hr
Apr 30, 5:20 AM CDT	Fire Weather Watch	MAF		49 hr
Apr 30, 1:19 PM CDT	Red Flag Warning	MAF		32 hr
Apr 30, 2:30 PM CDT	Severe Thunderstorm Warning	MAF	Pecos	60 min
Apr 30, 3:28 PM CDT	Severe Thunderstorm Warning	MAF	Brewster, Jeff Davis, Pecos	62 min
Apr 30, 4:09 PM CDT	Severe Thunderstorm Warning	MAF	Brewster	66 min
Apr 30, 4:31 PM CDT	Severe Thunderstorm Warning	MAF	Brewster, Pecos	59 min
Apr 30, 4:38 PM CDT	Severe Thunderstorm Warning	MAF	Brewster	52 min
Apr 30, 5:04 PM CDT	Severe Thunderstorm Warning	MAF	Borden, Scurry	56 min
Apr 30, 5:16 PM CDT	Severe Thunderstorm Warning	MAF	Brewster	59 min
Apr 30, 5:24 PM CDT	Severe Thunderstorm Warning	MAF	Brewster	51 min
Apr 30, 5:57 PM CDT	Severe Thunderstorm Warning	MAF	Borden, Scurry	63 min
Apr 30, 5:59 PM CDT	Areal Flood Advisory	MAF	Brewster	3 hr
Apr 30, 6:16 PM CDT	Severe Thunderstorm Warning	MAF	Brewster	39 min
Apr 30, 6:17 PM CDT	Severe Thunderstorm Warning	MAF	Howard, Martin	58 min
Apr 30, 6:52 PM CDT	Flash Flood Warning	MAF	Borden, Scurry	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.