Alert archive / Texas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 178, NWS San Angelo, TX

May 4, 2006Mason County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 4, 2006, 8:52 PM CDT for Mason County, Texas. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 4, 2006, 8:52 PM CDT (01:52 UTC)
Expired: May 4, 2006, 9:15 PM CDT
In force: 23 min
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Mason County, TX

The radar

The San Angelo radar (KSJT), 141 km from the middle of the area, began a volume at 01:56 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.

Issued	Product	Office	Lasted
May 4, 3:22 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.9 hours before the alert went out and 216 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: 3212 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1228 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 4, 6:09 PM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, May 4, 6:09 PM CDT, 2 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
609 PM CDT THU MAY 4 2006

.AVIATION...
VFR WILL CONTINUE AT BOTH TERMINALS THROUGH THE REMAINDER OF THE
EVENING WITH CEILINGS LOWERING TO MVFR AT BOTH TERMINALS AFTER
MIDNIGHT AND THROUGH THE MORNING HOURS. THERE WILL BE A CHANCE OF
THUNDERSTORMS AT BOTH TERMINALS TOMORROW AFTERNOON.

&&

.PREV DISCUSSION... (ISSUED 332 PM CDT THU MAY 4 2006)

UPDATE...
UPDATED ZONES TO ADD SEVERE THUNDERSTORM WATCH HEADLINE.

PREV DISCUSSION... (ISSUED 132 PM CDT THU MAY 4 2006)

SHORT TERM...
ALL KINDS OF POSSIBILITIES FOR CONVECTION THIS AFTERNOON. THREE
SURFACE BOUNDARIES IN THE AREA. COLD FRONT LOCATED ACROSS THE
NORTHERN BIG COUNTRY...DRYLINE LOCATED NEAR A KINK-KFST LINE AND
DEWPOINT GRADIENT/WEAK WARM FRONT LOCATED ALONG I-10. ALSO...UPPER
LEVEL SPEED MAX OVER NORTHERN MEXICO WITH SOUTHWEST AND WEST
CENTRAL TEXAS IN FAVORABLE LEFT EXIT REGION. THE 17Z LAPS DATA
INDICATES SBCAPE VALUES OF 2500 TO 3500 J/KG OVER THE SOUTHERN
CWFA AND CINH VALUES OF 80 TO 100 OVER SAN SABA AND MASON
COUNTIES. SHOULD SEE SCT STORMS FIRE ACROSS WEST CENTRAL TEXAS
AFTER 20Z. WITH STRONG INSTABILITY AND MODERATE SHEAR SHOULD SEE A
FEW SUPERCELLS WITH THE MAIN THREATS BEING VERY LARGE HAIL AND
DAMAGING WINDS...LATE THIS AFTERNOON AND TONIGHT. ISOLATED
TORNADOES ARE POSSIBLE IF THE STORMS CAN INTERACT WITH LOW LEVEL
BOUNDARIES AND GENERATE LOW LEVEL HELICITY. LOOKS LIKE AN MCS WILL
DEVELOP BY 05/03Z AND MOVE EAST-SOUTHEAST ACROSS CENTRAL TEXAS.
ALSO...LOCALLY HEAVY RAIN IS POSSIBLE.

LONG TERM...
A LITTLE BREAK FRIDAY MORNING...THEN SAME SETUP FOR FRIDAY
AFTERNOON AND FRIDAY NIGHT. STRONG INSTABILITY AND STRONG SHEAR
WILL BE PRESENT ACROSS THE AREA. ALSO...STRONGER UPPER LEVEL
DYNAMICS WILL BE PRESENT ON FRIDAY AND FRIDAY NIGHT. SO STORMS
WILL FIRE AGAIN FRIDAY AFTERNOON NEAR LEFT OVER BOUNDARIES...ESPECIALLY
THE THURSDAY NIGHT MCS OUTFLOW BOUNDARY WHICH WILL BE LOCATED NEAR
I-10. SEVERE WEATHER IS A GOOD BET AGAIN ON FRIDAY...ESPECIALLY
ACROSS THE SOUTHERN HALF OF CWFA. CHC POPS ACROSS THE EASTERN HALF
OF AREA ON SATURDAY...THEN MAINLY DRY WEATHER FOR SUNDAY THROUGH
THURSDAY AS UPPER HEIGHTS BUILD...RESULTING IN MID LEVEL CAPPING.
ALSO...ANOTHER GOOD SHOT OF COOL AIR MOVING SOUTH FOR NEXT
THURSDAY AND FRIDAY.

SJT WATCHES/WARNINGS/ADVISORIES...
SEVERE THUNDERSTORM WATCH UNTIL 11 PM THURSDAY FOR THE FOLLOWING
ZONES: BROWN...COKE...COLEMAN...CONCHO...CROCKETT...IRION...
KIMBLE...MASON...MCCULLOCH...MENARD...NOLAN...RUNNELS...SAN
SABA...SCHLEICHER...STERLING...SUTTON...AND TOM GREEN.

&&

.PRELIMINARY POINT TEMPS/POPS...
ABILENE      57  72  56  74 /  50  50  40  20
SAN ANGELO   61  84  59  80 /  50  50  50  20
JUNCTION     65  86  61  83 /  50  50  60  20

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
SEVERE THUNDERSTORM WATCH UNTIL 11 PM THURSDAY FOR THE FOLLOWING
ZONES: BROWN...COKE...COLEMAN...CONCHO...CROCKETT...IRION...
KIMBLE...MASON...MCCULLOCH...MENARD...RUNNELS...SAN SABA...
SCHLEICHER...STERLING...SUTTON...AND TOM GREEN.

&&

15/15/99

Hazardous weather outlook, May 4, 2:28 PM CDT, 6 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
228 PM CDT THU MAY 4 2006

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-051930-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
228 PM CDT THU MAY 4 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THE ATMOSPHERE WILL BE MODERATELY UNSTABLE THIS AFTERNOON AND
EVENING. SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO
INITIALLY FORM ALONG A PREEXISTING OUTFLOW BOUNDARY ROUGHLY ALONG
THE COLORADO RIVER. OTHER STORMS WILL LIKELY FORM NEAR THE DRYLINE
OVER THE PERMIAN BASIN AND TRANS PECOS...AND DRIFT INTO WEST
CENTRAL TEXAS DURING THE EVENING. LARGE HAIL WILL BE THE PRIMARY
SEVERE WEATHER THREAT. LOCALLY HEAVY RAIN...DAMAGING OUTFLOW WINDS
AND ISOLATED TORNADOES WILL ALSO BE POSSIBLE. THE LOCALLY HEAVY
RAIN THREAT WILL BE GREATEST FOLLOWING SUNSET.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A SIMILAR METEOROLOGICAL PATTERN IS ANTICIPATED FOR FRIDAY...THOUGH
WITH STRONGER UPPER LEVEL SUPPORT. SEVERE THUNDERSTORMS WILL BE
POSSIBLE OVER MOST OF WEST CENTRAL TEXAS AND MOST COMMON ALONG OLD
OUTFLOW BOUNDARIES REMAINING FROM TONIGHT/S THUNDERSTORMS. LARGE HAIL
WILL AGAIN BE THE PRIMARY SEVERE WEATHER THREAT. THE TORNADO
THREAT MAY BE INCREASED ON FRIDAY...DUE TO INCREASED ATMOSPHERIC
WIND SHEAR AND LOW LEVEL INSTABILITY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE REQUIRED LATE THIS AFTERNOON AND EVENING...
AND AGAIN ON FRIDAY.

14/21

In the hours before

Local storm report, May 4, 7:45 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
745 PM CDT THU MAY 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0735 PM     HAIL             10 S STERLING CITY      31.69N 100.99W
05/04/2006  E2.75 INCH       STERLING           TX   AMATEUR RADIO

&&

14

Special weather statement, May 4, 7:52 PM CDT, 1 hour before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
752 PM CDT THU MAY 4 2006

TXZ073-154-050145-
CONCHO TX-MCCULLOCH TX-
752 PM CDT THU MAY 4 2006

...SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 845 PM CDT FOR CONCHO
AND MCCULLOCH COUNTIES...

AT 747 PM CDT...A STRONG THUNDERSTORM WAS INDICATED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR 3 MILES NORTH OF MELVIN...OR ABOUT 16
MILES NORTHWEST OF BRADY...MOVING EAST AT 25 MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  PEAR VALLEY BY 800 PM CDT
  LOHN BY 815 PM CDT
  FIFE BY 820 PM CDT

PEA SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON ROADWAYS...ESPECIALLY
IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO MONITOR THE
SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER ACTIONS SHOULD A
WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
THURSDAY EVENING FOR WEST CENTRAL TEXAS.

Local storm report, May 4, 8:00 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
800 PM CDT THU MAY 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0755 PM     HAIL             17 WNW ARDEN            31.56N 101.02W
05/04/2006  M4.00 INCH       TOM GREEN          TX   STORM CHASER

&&

14

Local storm report, May 4, 8:30 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
830 PM CDT THU MAY 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0828 PM     HAIL             5 E MASON               30.75N 99.15W
05/04/2006  M1.00 INCH       MASON              TX   PUBLIC

&&

14

Local storm report, May 4, 8:37 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
837 PM CDT THU MAY 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0835 PM     HAIL             8 WSW MERTZON           31.22N 100.95W
05/04/2006  M1.75 INCH       IRION              TX   NWS EMPLOYEE

&&

14

Local storm report, May 4, 8:38 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
838 PM CDT THU MAY 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0831 PM     HAIL             5 E MASON               30.75N 99.15W
05/04/2006  M1.75 INCH       MASON              TX   PUBLIC

&&

14

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 7:09 PM CDT	Severe Thunderstorm Warning	SJT	Concho, McCulloch	36 min
May 4, 7:13 PM CDT	Flash Flood Warning	SJT	Concho, McCulloch, Mason	2 hr
May 4, 7:14 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, Mason, San Saba	31 min
May 4, 7:29 PM CDT	Severe Thunderstorm Warning	SJT	Sterling, Tom Green	46 min
May 4, 7:31 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman, Concho, McCulloch	29 min
May 4, 7:42 PM CDT	Tornado Warning	SJT	Mason	33 min
May 4, 7:43 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	32 min
May 4, 7:55 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Irion, Tom Green	50 min
May 4, 7:57 PM CDT	Tornado Warning	SJT	Irion, Sterling, Tom Green	48 min
May 4, 8:03 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman	27 min
May 4, 8:13 PM CDT	Severe Thunderstorm Warning	SJT	Mason	32 min
May 4, 8:36 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Runnels	24 min
May 4, 8:44 PM CDT	Tornado Warning	SJT	Irion, Tom Green	31 min
May 4, 8:55 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	35 min
May 4, 9:01 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman	29 min
May 4, 9:11 PM CDT	Tornado Warning	SJT	Irion, Schleicher, Tom Green	49 min
May 4, 9:16 PM CDT	Severe Thunderstorm Warning	SJT	Mason	44 min
May 4, 9:27 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	48 min
May 4, 9:31 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman	29 min
May 4, 9:55 PM CDT	Tornado Warning	SJT	Schleicher, Tom Green	35 min
May 4, 10:00 PM CDT	Severe Thunderstorm Warning	SJT	Brown	35 min
May 4, 10:15 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Shackelford	30 min
May 4, 10:18 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	27 min
May 4, 10:24 PM CDT	Tornado Warning	SJT	Fisher, Nolan	36 min
May 4, 10:29 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	22 min
May 4, 10:38 PM CDT	Severe Thunderstorm Warning	SJT	Jones	52 min
May 4, 10:59 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	31 min
May 4, 11:01 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, Mason, San Saba	29 min
May 4, 11:12 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	33 min
May 4, 11:25 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	50 min
May 4, 11:30 PM CDT	Severe Thunderstorm Warning	SJT	Nolan, Taylor	45 min
May 4, 11:30 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, Mason, San Saba	30 min
May 4, 11:45 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	22 min
May 4, 11:47 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	43 min
May 5, 1:53 AM CDT	Severe Thunderstorm Warning	SJT	Concho, McCulloch	67 min
May 5, 7:29 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	46 min
May 5, 5:52 PM CDT	Severe Thunderstorm Warning	SJT	Taylor	53 min
May 5, 6:15 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	45 min
May 5, 6:28 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Taylor	32 min
May 5, 6:34 PM CDT	Tornado Warning	SJT	Callahan, Taylor	26 min
May 5, 6:50 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	55 min
May 5, 6:51 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	39 min
May 5, 6:57 PM CDT	Tornado Warning	SJT	Callahan	48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2006 Every severe thunderstorm warning in 2006

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.