Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS San Angelo, TX

July 23, 2012Shackelford County, Texas

NWS San Angelo, TX issued this special weather statement at Jul 23, 2012, 4:52 PM CDT for Shackelford County, Texas. It was in force for 53 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: Jul 23, 2012, 4:52 PM CDT (21:52 UTC)
Expired: Jul 23, 2012, 5:45 PM CDT
In force: 53 min
Issued by: NWS San Angelo, TX

County Shackelford County, TX

The radar

The Dyess AFB radar (KDYX), 22 km from the middle of the area, began a volume at 21:40 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.

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this special weather statement went out at Jul 22, 6:05 PM CDT, 22 hours 47 minutes earlier.

Area forecast discussion, Jul 22, 6:05 PM CDT, 22 hours 47 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
605 PM CDT SUN JUL 22 2012

.DISCUSSION...
SEE AVIATION DISCUSSION BELOW...

&&

.AVIATION...
SCATTERED SHOWERS AND THUNDERSTORMS WERE CURRENTLY LOCATED JUST
NORTH OF KSJT AND KABI...AND IN THE VICINITY OF KJCT. INCLUDED
TEMPO GROUPS AT THESE SITES FOR THUNDER AND THE POSSIBILITY OF
GUSTY WINDS. MOST OF THIS CONVECTION SHOULD BEGIN TO DISSIPATE BETWEEN
02Z AND 03Z. SOUTH WINDS WILL REMAIN BETWEEN 5 AND 10 KNOTS
TONIGHT...THEN INCREASE TO 10 TO 15 KNOTS BY LATE MORNING.
SCATTERED SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE
MONDAY AFTERNOON...BUT DID NOT INCLUDE IN THE CURRENT TAF PACKAGE
AS THE LOCATION OF ANY THUNDERSTORMS IS HARD TO PINPOINT AT THIS
TIME.

&&

.PREV DISCUSSION... /ISSUED 340 PM CDT SUN JUL 22 2012/

SHORT TERM...
SHOWERS AND THUNDERSTORMS HAVE STARTED TO REDEVELOP THIS
AFTERNOON IN WEST CENTRAL TEXAS...IN ASSOCIATION WITH A WEAK UPPER
LEVEL DISTURBANCE ENTERING OUR EASTERN COUNTIES. THIS DISTURBANCE
IS MOVING WEST AROUND THE SOUTHERN PERIPHERY OF THE BROAD UPPER
HIGH CENTERED OVER KANSAS. EXPECT ISOLATED TO SCATTERED COVERAGE
OF THE CONVECTION THIS AFTERNOON AND EARLY EVENING. WITH DOWNDRAFT
CAPE INCREASING TO 1500-1800 J/KG THIS AFTERNOON...A FEW OF THE
STORMS COULD PRODUCE STRONG DOWNBURST WINDS.

HAVE SOME UNCERTAINTY ON THE CHANCE FOR SHOWERS AND THUNDERSTORMS
TONIGHT. BELIEVE THE DIURNALLY DRIVEN ACTIVITY WILL DISSIPATE
EARLY TONIGHT...BUT SOME OVERNIGHT DEVELOPMENT OF CONVECTION
OCCURRED WITH THE ASSOCIATED UPPER DISTURBANCE LAST NIGHT ACROSS
CENTRAL TEXAS. CARRYING A LINGERING 20 POP OVERNIGHT.

THE BROAD UPPER HIGH WILL SHIFT SOUTHEAST AND BECOME RE-CENTERED
OVER THE SOUTHEASTERN MISSOURI BY MONDAY EVENING. THIS WILL ALLOW
AN EASTERLY WAVE TO MOVE INTO SOUTHEASTERN TEXAS AND APPROACH OUR
AREA FROM THE SOUTHEAST LATE IN THE DAY. THE POSSIBILITY OF
SHOWERS/ THUNDERSTORMS LOOKS MORE REMOTE FOR OUR AREA DURING THE
DAY MONDAY...WITH THE EASTERLY WAVE STILL SOME DISTANCE AWAY.
DECIDED TO KEEP POPS JUST UNDER 15 PERCENT AND NON-MENTIONABLE AT
THIS TIME.

THE 850 MB TEMPERATURES ON MONDAY ARE PROGGED TO BE 2-4 DEGREES C
LOWER THAN TODAY...WITH THE LARGER RELATIVE DIFFERENCES ACROSS OUR
NORTHERN AND WESTERN COUNTIES. THIS SHOULD RESULT IN MAX
TEMPERATURES BEING BELOW 100 DEGREES AREAWIDE ON MONDAY. GOING
WITH HIGHS IN THE MID TO UPPER 90S.

LONG TERM...
THE LONG TERM FORECAST HAS CHANGED VERY LITTLE FROM THE PREVIOUS
VERSION.

BEGINNING TOMORROW NIGHT...MEDIUM RANGE MODELS CONTINUE TO SHOW A
WEAK EASTERLY WAVE/INVERTED MID/UPPER TROUGH MOVING ACROSS THE
AREA TOMORROW INTO TOMORROW NIGHT. FOR THAT HAVE GONE AHEAD AND
INSERTED AN ISOLATED TO SLIGHT CHANCE FOR SHOWERS THUNDERSTORMS
TOMORROW EVENING AS IT APPEARS THAT MOST OF THE VIGOROUS
CONVECTION SEEMS TO BE STARTING RATHER LATE IN THE DAY. IN
ADDITION...WV IMAGERY DOES SHOW WHAT APPEARS TO BE WEAK SHORTWAVES
MOVING TOWARD THE AREA IN WESTERLY FLOW ALONG THE SOUTHERN
PERIPHERY OF THE HIGH PRESSURE AREA ALOFT OVER THE SOUTHEASTERN
CONUS. HOWEVER...AS THIS INITIAL EASTERLY WAVE MOVES WEST...A
WEAKNESS DEVELOPS IN THE RIDGING OVER NEW MEXICO/WEST TEXAS. THIS
WILL LIKELY RESULT IN A CHANCE FOR THUNDERSTORMS TO OUR WEST...BUT
IT APPEARS AT THIS TIME THAT WE WILL BE LEFT MAINLY DRY. IF THE
WEAKNESS MOVES A LITTLE FARTHER EAST...POPS WILL HAVE TO BE
CONSIDERED FOR OUR AREA...BUT AT THIS TIME...WE WILL LEAVE OUR
FORECAST DRY FOR THE MOST PART.

TEMPERATURES WILL REMAIN HOT...MAINLY IN THE UPPER 90S TO AROUND
100 DEGREES FOR HIGHS WITH THE WARMEST TEMPERATURES NORTH OF
INTERSTATE 20. LOWS WILL BE IN THE 70S.

&&

.PRELIMINARY POINT TEMPS/POPS...
ABILENE 	 76  96  74  96  75 /  20  10  10  10  10
SAN ANGELO 	 76  98  73  96  76 /  20  10  10  10  10
JUNCTION 	 75  96  73  96  75 /  20  10  10  10  10

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
ZONES: HASKELL...THROCKMORTON.

&&

DANIELS

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 8:55 PM CDT	Special Weather Statement	SJT	Tom Green	50 min
Jul 23, 3:14 PM CDT	Special Weather Statement	SJT	Irion	46 min
Jul 23, 3:23 PM CDT	Special Weather Statement	SJT	Shackelford	67 min
Jul 23, 3:31 PM CDT	Special Weather Statement	SJT	Tom Green	59 min
Jul 23, 3:51 PM CDT	Special Weather Statement	SJT	Irion	54 min
Jul 23, 4:10 PM CDT	Special Weather Statement	SJT	Shackelford	65 min
Jul 23, 4:40 PM CDT	Special Weather Statement	SJT	Throckmorton	65 min
Jul 23, 5:52 PM CDT	Special Weather Statement	SJT	Nolan	53 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement 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; radar from the NEXRAD Level II archive.