Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 287, NWS San Angelo, TX

November 23, 2004Concho County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Nov 23, 2004, 3:33 PM CST for Concho County, Texas. It was in force for 42 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
Nov 23, 2004, 3:33 PM CST (21:33 UTC)
Expired
Nov 23, 2004, 4:15 PM CST
In force
42 min
Issued by
NWS San Angelo, TX
Area
Counties, with a storm outline in the text

County Concho County, TX

The radar

The San Angelo radar (KSJT), 60 km from the middle of the area, began a volume at 21:33 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
Nov 23, 3:15 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 9.6 hours before the alert went out and 237 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 2004-11-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 682 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 2004-11-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 square meters per square second.1939587897Sfc1 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
682 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
554 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.6

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 Nov 23, 10:33 AM CST, 5 hours earlier.

Area forecast discussion, Nov 23, 10:33 AM CST, 5 hours before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
1033 AM CST TUE NOV 23 2004

LOOKS LIKE THE THE DYNAMICS WILL BE TO OUR EAST...AN ACTIVE WEATHER
DAY FOR THE EASTERN HALF OF THE STATE.

FOR MOST OF OUR AREA...WE WILL SEE DRIER AIR AND MORE SUN.  HAVE
DECREASED CLOUDS AND RAISED MAX TEMPS INTO THE 70S FOR OUR WESTERN
COUNTIES. AND DECREASED POPS...KEEPING HIGHEST POPS ALONG OUR
EASTERN COUNTIES.

.UPDATE...HAVE UPDATED TO SIGNIFICANTLY LOWER POPS AND REMOVE
PORTIONS OF THE SEVERE THUNDERSTORM WATCH. COUPLED JET STRUCTURE
WITH THUNDERSTORMS EXITING BIG COUNTRY WITH ONE JET STREAK AND
THUNDERSTORMS FORMING OVER CENTRAL TEXAS WITH THE OTHER. THUS MOST
ACTIVITY DOES NOT LOOK LIKE IT WILL MATERIALIZE. HOWEVER CAN NOT
TAKE OUT POPS ALL TOGETHER YET UNTIL THE MAIN SYSTEM PASSES BY.

&&

.CLIMATE...ABILENE IS NOW UP TO THE SECOND WETTEST NOVEMBER ON
RECORD.

&&

.PREV DISCUSSION...
HAVE UPDATED ZONES FOR NEW SEVERE THUNDERSTORM WATCH REPLACING
TORNADO WATCH.  WENT AHEAD AND ADDED 60 POPS ACROSS THE BOARD
WITH HIGHEST POPS ACROSS EAST AND NORTHEAST ZONES.

MAIN CONCERN TODAY IS THE SEVERE WEATHER THREAT FOR WC TX
LOW LEVEL JET HAS STRENGTHEN ACCORDING TO THE VAD WIND PROFILE TO
30 KNOTS. ALREADY SEEING ELEVATED TSTORM DEVELOPING ACROSS MAF CWA IN
ADVANCE OF APPROACHING UPPER SHORTWAVE TROF AND STEEP LAPSE RATES.
WITH STRONG SHEAR...CAPE VALUES OF 1000-1500JOULES/KG...AND SURFACE
BOUNDARY...EXPECT MOSTLY ELEVATED TYPE SUPERCELL STORMS TO PRODUCE
LARGE HAIL EARLY THIS MORNING.  BY LATE MORNING INTO EARLY
AFTERNOON...EXPECT THESE ELEVATED SUPERCELL STORMS TO BECOME MORE
SURFACE BASED WITH RETURNING BOUNDARIES AND LOW LEVEL MOISTURE...AND
PRODUCE THE POTENTIAL OF TORNADOES GIVEN BOTH INSTABILITY...SURFACE
BOUNDARY...LOW LIFTING CONDENSATION LEVELS...AND INCREASING
SHEAR.

WILL KEEP FLASH FLOOD WATCH THROUGH TODAY AS HEAVY RAIN FROM
SEVERE STORMS COULD PRODUCE FLASH FLOODING GIVING VERY LOW
FLASH FLOOD GUIDANCE.

AS POTENT LOW PRESSURE SYSTEM MOVES NORTHEAST LATE THIS
AFTERNOON...WILL CONTINUE TO SEE WRAP AROUND MOISTURE ACROSS
NORTHERN CWA THROUGH WEDNESDAY MORNING.  EXPECT DRY AND COOLER
WEATHER THROUGH FRIDAY AS RIDGE OF HIGH PRESSURE BUILDS INTO WC TX.
COULD SEE FREEZING TEMPS ON THANKSGIVING MORNING.

UPPER FLOW BECOMES SOUTHWEST SUNDAY INTO MONDAY...AND NEXT
FRONT IS PROGGED BY GFS ACROSS THE TX PANHANDLE.  AT ANY RATE...
SHOULD CONTINUE TO SEE DRY WEATHER THROUGH MONDAY.

&&

.SJT WATCHES/WARNINGS/ADVISORIES...SEVERE THUNDERSTORM WATCH TIL 9
AM FOR CONCHO...COLEMAN...BROWN AND MCCULLOCH.

&&

27/BRAZZELL
Hazardous weather outlook, Nov 23, 1:21 PM CST, 2 hours 12 minutes before
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In the hours before

Special weather statement, Nov 23, 2:48 PM CST, 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
248 PM CST TUE NOV 23 2004

TXZ072-232145-

TOM GREEN TX-
248 PM CST TUE NOV 23 2004

...SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 345 PM CST FOR TOM GREEN
COUNTY...

AT 243 PM CST...A LINE OF STRONG THUNDERSTORMS WAS INDICATED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR JUST SOUTHWEST OF SAN ANGELO...
MOVING TOWARD THE CITY. THE STRONG THUNDERSTORM WILL PRODUCE PEA SIZE HAIL
AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.

RESIDENTS ARE ENCOURAGED TO MONITOR THE SITUATION CLOSELY AND BE
PREPARED TO TAKE THE PROPER ACTIONS SHOULD A WARNING BE ISSUED.
Local storm report, Nov 23, 3:02 PM CST, 31 minutes before
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Special weather statement, Nov 23, 3:18 PM CST, 15 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Nov 23, 3:20 AM CSTSevere Thunderstorm WarningSJTFisher40 min
Nov 23, 2:52 PM CSTSevere Thunderstorm WarningSJTTom Green38 min
Nov 23, 3:47 PM CSTSevere Thunderstorm WarningSJTColeman43 min
Nov 23, 4:24 PM CSTSevere Thunderstorm WarningSJTBrown51 min
Nov 23, 4:53 PM CSTSevere Thunderstorm WarningSJTShackelford52 min

Nearby

Severe Thunderstorm Warnings in Texas, 2004Every severe thunderstorm warning in 2004

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.