Alert archive / Texas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 47

February 22, 200021 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Feb 22, 2000, 7:00 PM CST for 21 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Feb 22, 2000, 7:00 PM CST (01:00 UTC)
Expired: Feb 23, 2000, 12:00 AM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 21 counties

Bandera County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Burnet County, TX, Comanche County, TX, Coryell County, TX, Edwards County, TX, Gillespie County, TX, Hamilton County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, Real County, TX, San Saba County, TX

The radar

The San Angelo radar (KSJT), 145 km from the middle of the area, began a volume at 00:59 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.

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Feb 22, 7:30 PM CST	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	45 min
Feb 22, 7:47 PM CST	Severe Thunderstorm Warning	EWX	Edwards	28 min
Feb 22, 8:08 PM CST	Tornado Warning	EWX	Edwards	67 min
Feb 22, 8:12 PM CST	Severe Thunderstorm Warning	SJT	San Saba	33 min
Feb 22, 8:29 PM CST	Severe Thunderstorm Warning	SJT	Mason	31 min
Feb 22, 8:37 PM CST	Severe Thunderstorm Warning	FWD	Lampasas	53 min
Feb 22, 8:40 PM CST	Severe Thunderstorm Warning	EWX	Llano	65 min
Feb 22, 8:45 PM CST	Severe Thunderstorm Warning	EWX	Burnet	60 min
Feb 22, 8:47 PM CST	Severe Thunderstorm Warning	EWX	Gillespie	58 min
Feb 22, 8:54 PM CST	Severe Thunderstorm Warning	EWX	Real	66 min
Feb 22, 9:07 PM CST	Tornado Warning	EWX	Edwards	38 min
Feb 22, 9:33 PM CST	Tornado Warning	FWD	Bell	27 min
Feb 22, 9:59 PM CST	Tornado Warning	FWD	Bell	31 min

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.0 hours before the alert went out and 195 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: 2362 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1410 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

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

218 
WWUS9 KMKC 230027
SEL7  
MKC WW 230027
TXZ000-230600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 47
STORM PREDICTION CENTER NORMAN OK
627 PM CST TUE FEB 22 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRAL TEXAS                              

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 700 PM
UNTIL MIDNIGHT CST.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 70 STATUTE MILES
EAST AND WEST OF A LINE FROM 70 MILES SOUTH SOUTHWEST OF JUNCTION
TEXAS TO 25 MILES NORTH NORTHWEST OF WACO TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 44.  WATCH NUMBER 44 WILL NOT BE IN EFFECT
AFTER 700 PM CST.  CONTINUE...WW 45...WW 46...

DISCUSSION...SQUALL LINE CONTINUES TO INTENSIFY ACROSS WEST CENTRAL
TX AS STRONG TROUGH MOVES INTO WRN TX. 00Z DRT SOUNDING INDICATES
MODERATE INSTABILITY WITH CAPES TO 2400 J/KG AND FAVORABLE DEEP
LAYER SHEAR.  PREDOMINATE STORM TYPE WILL BE A LINEAR SQUALL LINE
WITH SHEAR PROFILES STILL FAVORABLE SOME ROTATING STORMS ENHANCING
INTENSITY.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 26030.


...HALES

315,0961 293,0990 293,1012 315,0983

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 22, 6:00 PM CST	Severe Thunderstorm Watch	SPC	Clay, Collin, Cooke, Dallas, Denton, Ellis and 14 more	5 hr
Feb 22, 10:00 PM CST	Severe Thunderstorm Watch	SPC	Anderson, Bastrop, Bell, Bexar, Blanco, Bowie and 46 more	5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2000 Every severe thunderstorm watch in 2000

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.