Alert archive / Texas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 124

March 26, 200010 parishes in Louisiana; 26 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Mar 26, 2000, 10:30 PM CST for 10 parishes in Louisiana; 26 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Mar 26, 2000, 10:30 PM CST (04:30 UTC)
Expired: Mar 27, 2000, 4:00 AM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 36 counties

Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Webster Parish, LA, Anderson County, TX, Angelina County, TX, Cherokee County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Houston County, TX, Jasper County, TX, Leon County, TX, Madison County, TX, Marion County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 105 km from the middle of the area, began a volume at 04:33 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Mar 26, 10:51 PM CST	Severe Thunderstorm Warning	SHV	Harrison	54 min
Mar 26, 10:54 PM CST	Severe Thunderstorm Warning	SHV	Bossier	51 min
Mar 26, 10:57 PM CST	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union, Webster	48 min
Mar 26, 11:28 PM CST	Severe Thunderstorm Warning	SHV	Caddo, De Soto, Red River	47 min
Mar 27, 12:14 AM CST	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River	46 min

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 4.5 hours before the alert went out and 114 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: 288 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1675 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

000 
WWUS9 KMKC 270412
MKC WW 270412
LAZ000-TXZ000-271000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 124
STORM PREDICTION CENTER NORMAN OK
1012 PM CST SUN MAR 26 2000

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

   NORTHWEST LOUISIANA                          
   SOUTHEAST TEXAS                              

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1030 PM UNTIL
400 AM CST.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST OF TYLER TEXAS TO
55 MILES NORTH NORTHEAST OF FORT POLK LOUISIANA.

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...  CONTINUE...WW 123...

DISCUSSION...INTENSE SQUALL LINE IS EXPECTED TO MOVE RAPIDLY SEWD
ACROSS NWRN LA/FAR E TX DURING THE NEXT SEVERAL HOURS WITH THE
POTENTIAL FOR SIGNIFICANT WIND DAMAGE.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUMR TOPS TO 500.  MEAN STORM
MOTION VECTOR 29040.


...VESCIO

;324,0960 325,0924 304,0924 303,0960;

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 26, 11:15 PM CST	Severe Thunderstorm Watch	SPC	Bienville, Caldwell, Catahoula, Claiborne, Concordia, East Carroll and 14 more	5 hr
Mar 27, 2:00 AM CST	Severe Thunderstorm Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 23 more	6 hr
Mar 27, 4:00 AM CST	Severe Thunderstorm Watch	SPC	Ascension, Assumption, Jefferson, Lafourche, Orleans, Plaquemines and 5 more	5 hr
Mar 26, 7:45 PM CST	Severe Thunderstorm Watch	SPC	Bowie, Camp, Cass, Delta, Fannin, Franklin and 10 more	5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2000 Severe Thunderstorm Watches in Louisiana, 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.