Alert archive / Texas / Tornado Watches in 2000
Tornado Watch 135
The Storm Prediction Center issued this tornado watch at Mar 29, 2000, 1:30 PM CST for Columbia County, Lafayette County, Miller County, Arkansas; 8 parishes in Louisiana; 17 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2000, 1:30 PM CST (19:30 UTC)
- Expired
- Mar 29, 2000, 8:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Columbia County, AR, Lafayette County, AR, Miller County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Webster Parish, LA, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Hopkins County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 70 km from the middle of the area, began a volume at 19:29 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 4:35 PM CST | Severe Thunderstorm Warning | SHV | Cass | 40 min |
| Mar 29, 5:01 PM CST | Severe Thunderstorm Warning | SHV | Harrison, Marion | 44 min |
| Mar 29, 5:12 PM CST | Severe Thunderstorm Warning | SHV | Caddo | 63 min |
| Mar 29, 5:34 PM CST | Severe Thunderstorm Warning | SHV | Bossier | 71 min |
| Mar 29, 5:41 PM CST | Tornado Warning | SHV | Bossier, Caddo | 34 min |
| Mar 29, 6:15 PM CST | Tornado Warning | SHV | Bossier | 30 min |
| Mar 29, 6:21 PM CST | Severe Thunderstorm Warning | SHV | Caddo | 54 min |
| Mar 29, 6:55 PM CST | Severe Thunderstorm Warning | SHV | Webster | 50 min |
| Mar 29, 7:00 PM CST | Severe Thunderstorm Warning | SHV | Bossier | 30 min |
| Mar 29, 7:29 PM CST | Severe Thunderstorm Warning | SHV | Bienville | 46 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 7.5 hours before the alert went out and 79 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1005 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 286 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
971 WWUS9 KMKC 291909 SEL5 SEL5 MKC WW 291904 ARZ000-LAZ000-TXZ000-300200- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 135 STORM PREDICTION CENTER NORMAN OK 104 PM CST WED MAR 29 2000 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHWEST ARKANSAS NORTHWEST LOUISIANA NORTHEAST TEXAS EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 800 PM CST. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... DAMAGING TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES SOUTH SOUTHEAST OF LONGVIEW TEXAS TO 70 MILES NORTH NORTHWEST OF SHREVEPORT LOUISIANA. 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 134... DISCUSSION...VERY UNSTABLE AIRMASS IN PLACE AHEAD OF COLD FRONT OVER NERN TX. WARM FRONT EXTENDS EWD FROM SURFACE LOW CENTER JUST W OF PRX INTO NRN LA. 18Z SOUNDINGS AND LOCAL VWP INDICATE FAVORABLE SHEAR PROFILES FOR TORNADIC SUPERCELLS. STORMS EXPECTED TO RAPIDLY DEVELOP NERN TX AHEAD OF COLD FRONT AND QUICKLY INTENSIFY TO SUPERCELLS...PARTICULARLY VICINITY AND JUST S OF WARM FRONT. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 26035. ...HALES 332,0925 313,0930 313,0953 332,0953
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 8:00 PM CST | Severe Thunderstorm Watch | SPC | Hempstead, Howard, Lafayette, Little River, Miller, Montgomery and 3 more | 5 hr |
| Mar 29, 1:00 PM CST | Tornado Watch | SPC | Acadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Evangeline and 20 more | 5 hr |
| Mar 28, 6:00 PM CST | Tornado Watch | SPC | Bastrop, Bell, Bexar, Blanco, Burleson, Burnet and 18 more | 5 hr |
| Mar 28, 10:00 PM CST | Severe Thunderstorm Watch | SPC | Archer, Bell, Blanco, Bosque, Brazos, Burleson and 39 more | 6 hr |
| Mar 29, 3:30 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Bell, Blanco, Bosque, Brazos, Burleson and 29 more | 6 hr |
Nearby
Tornado Watches in Texas, 2000Tornado Watches in Louisiana, 2000Tornado Watches in Arkansas, 2000Every tornado 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.