Alert archive / Texas / Tornado Watches in 2001

Tornado Watch 142

April 14, 20014 states

The Storm Prediction Center issued this tornado watch at Apr 14, 2001, 4:30 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 14, 2001, 4:30 PM CDT (21:30 UTC)
Expired: Apr 14, 2001, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 46 counties

Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Pike County, AR, Polk County, AR, Sevier County, AR, Bossier Parish, LA, Webster Parish, LA, Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, Murray County, OK, Pontotoc County, OK, Pushmataha County, OK, Stephens County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Marion County, TX, Montague County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Norman radar (KTLX), 167 km from the middle of the area, began a volume at 21:32 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
Apr 14, 4:58 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	47 min
Apr 14, 5:03 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	27 min
Apr 14, 5:11 PM CDT	Severe Thunderstorm Warning	OUN	Carter	49 min
Apr 14, 5:14 PM CDT	Severe Thunderstorm Warning	LZK	Polk	51 min
Apr 14, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter	31 min
Apr 14, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Johnston, Marshall	51 min
Apr 14, 6:20 PM CDT	Severe Thunderstorm Warning	OUN	Grady	40 min
Apr 14, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	47 min
Apr 14, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	47 min
Apr 14, 7:10 PM CDT	Severe Thunderstorm Warning	LZK	Polk	50 min
Apr 14, 7:20 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	70 min
Apr 14, 9:02 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	63 min
Apr 14, 9:51 PM CDT	Severe Thunderstorm Warning	LZK	Polk	29 min

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.5 hours before the alert went out and 164 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: 116 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WWUS9 KMKC 142117
SEL2  

SEL2  
MKC WW 142111
ARZ000-LAZ000-OKZ000-TXZ000-150300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 142
STORM PREDICTION CENTER NORMAN OK
411 PM CDT SAT APR 14 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHWEST ARKANSAS                           
   NORTHWEST LOUISIANA                          
   SOUTHERN OKLAHOMA                           
   NORTH TEXAS                              

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 430 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 60 MILES WEST OF ARDMORE OKLAHOMA TO 40 MILES
EAST OF TEXARKANA ARKANSAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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 140...WW 141...

DISCUSSION...SCATTERED THUNDERSTORMS HAVE BEGUN TO FORM ALONG
SURFACE BOUNDARY ACROSS NORTH TX/LA...EXTENDING ROUGHLY FROM DFW-
SHV.  STRONG INSTABILITY IN VICINITY OF BOUNDARY...COUPLED WITH
FAVORABLE VERTICAL SHEAR PROFILES WILL PROMOTE SUPERCELL
DEVELOPMENT WITH THE THREAT OF VERY LARGE HAIL AND ISOLATED
TORNADOES.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 26030.


...HART

;351,0980 342,0931 323,0931 332,0980;

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 14, 2:45 PM CDT	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Comanche, Cotton and 14 more	6 hr
Apr 14, 5:30 PM CDT	Tornado Watch	SPC	Archer, Baylor, Callahan, Coke, Crockett, Fisher and 16 more	5 hr

Nearby

Tornado Watches in Texas, 2001 Tornado Watches in Oklahoma, 2001 Tornado Watches in Arkansas, 2001 Every tornado watch in 2001

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.