Alert archive / Texas / Tornado Watches in 2001
Tornado Watch 127
The Storm Prediction Center issued this tornado watch at Apr 11, 2001, 2:45 AM CDT for 36 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2001, 2:45 AM CDT (07:45 UTC)
- Expired
- Apr 11, 2001, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Bell County, TX, Bosque County, TX, Brown County, TX, Clay County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 94 km from the middle of the area, began a volume at 07:45 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
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 2:55 AM CDT | Severe Thunderstorm Warning | FWD | Montague, Wise | 65 min |
| Apr 11, 2:59 AM CDT | Severe Thunderstorm Warning | FWD | Comanche | 61 min |
| Apr 11, 2:59 AM CDT | Severe Thunderstorm Warning | SJT | McCulloch | 31 min |
| Apr 11, 3:28 AM CDT | Severe Thunderstorm Warning | FWD | Parker | 62 min |
| Apr 11, 3:33 AM CDT | Severe Thunderstorm Warning | FWD | Cooke | 57 min |
| Apr 11, 3:34 AM CDT | Severe Thunderstorm Warning | FWD | Mills | 41 min |
| Apr 11, 3:42 AM CDT | Severe Thunderstorm Warning | FWD | Hamilton | 63 min |
| Apr 11, 3:44 AM CDT | Severe Thunderstorm Warning | FWD | Erath, Somervell | 46 min |
| Apr 11, 3:51 AM CDT | Tornado Warning | FWD | Cooke | 24 min |
| Apr 11, 4:12 AM CDT | Severe Thunderstorm Warning | FWD | Bosque | 63 min |
| Apr 11, 4:16 AM CDT | Severe Thunderstorm Warning | FWD | Denton, Grayson | 59 min |
| Apr 11, 4:25 AM CDT | Severe Thunderstorm Warning | FWD | Johnson | 50 min |
| Apr 11, 4:53 AM CDT | Severe Thunderstorm Warning | FWD | Tarrant | 37 min |
| Apr 11, 4:56 AM CDT | Severe Thunderstorm Warning | FWD | Hill | 34 min |
| Apr 11, 5:04 AM CDT | Severe Thunderstorm Warning | FWD | Dallas | 41 min |
| Apr 11, 5:15 AM CDT | Severe Thunderstorm Warning | FWD | Ellis | 30 min |
| Apr 11, 5:45 AM CDT | Severe Thunderstorm Warning | FWD | Kaufman | 45 min |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 7.8 hours before the alert went out and 113 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.
- Mixed-layer CAPE
- 1205 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1008 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS9 KMKC 110723 SEL7 SEL7 MKC WW 110718 TXZ000-111300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 127 STORM PREDICTION CENTER NORMAN OK 218 AM CDT WED APR 11 2001 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHERN AND CENTRAL TEXAS EFFECTIVE THIS WEDNESDAY MORNING FROM 245 AM UNTIL 800 AM CDT. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES SOUTH SOUTHEAST OF BROWNWOOD TEXAS TO 70 MILES NORTH OF DALLAS TEXAS. 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...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 123. WATCH NUMBER 123 WILL NOT BE IN EFFECT AFTER 245 AM CDT. CONTINUE...WW 124...WW 125...WW 126... ALSO...A NEW WW WILL BE ISSUED SHORTLY ACROSS CENTRAL/ERN OK INTO SERN KS. DISCUSSION...STORNG STORMS ARE BECOMING BETTER ORGANIZED OVER CENTRAL TX IN ADVANCE OF SHORT WAVE TROUHG LIFTING NEWD ACROSS THE SRN ROCKIES. WIND PROFILES REMAIN SUPPORTIVE OF SEVERE STORMS WITH POTENTIAL FOR SUPERCELL DEVELOPMENT AND POSSIBLE TORNADOES. AVIATION...TORNADOES AND 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 MAXIMUM TOPS TO 450. MEAN STORM ,MOTION VECTOR 23050. ...WEISS ;335,0952 305,0971 305,0995 335,0981;
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 7:00 PM CDT | Tornado Watch | SPC | Armstrong, Borden, Briscoe, Carson, Childress, Collingsworth and 32 more | 5 hr |
| Apr 10, 8:45 PM CDT | Tornado Watch | SPC | Coke, Crockett, Edwards, Irion, Nolan, Reagan and 6 more | 3 hr |
| Apr 10, 9:30 PM CDT | Tornado Watch | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 26 more | 6 hr |
| Apr 11, 12:00 AM CDT | Tornado Watch | SPC | Childress, Collingsworth, Cottle, Hall, Hardeman, Hemphill and 2 more | 4 hr |
| Apr 11, 6:15 AM CDT | Tornado Watch | SPC | Bowie, Camp, Cass, Delta, Franklin, Gregg and 15 more | 6 hr |
Nearby
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.