Alert archive / Louisiana / Tornado Watches in 1999
Tornado Watch 153
The Storm Prediction Center issued this tornado watch at Apr 14, 1999, 10:00 AM CDT for 11 counties in Arkansas; 25 parishes in Louisiana; 14 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 1999, 10:00 AM CDT (15:00 UTC)
- Expired
- Apr 14, 1999, 4:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Ashley County, AR, Bradley County, AR, Calhoun County, AR, Columbia County, AR, Drew County, AR, Hempstead County, AR, Lafayette County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Angelina County, TX, Chambers County, TX, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 79 km from the middle of the area, began a volume at 15:03 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
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 10:12 AM CDT | Severe Thunderstorm Warning | HGX | Liberty | 48 min |
| Apr 14, 10:16 AM CDT | Severe Thunderstorm Warning | LCH | Hardin, Tyler | 59 min |
| Apr 14, 10:26 AM CDT | Severe Thunderstorm Warning | HGX | Polk | 49 min |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 3.0 hours before the alert went out and 377 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
- 1238 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 4:00 PM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 18 more | 6 hr |
| Apr 14, 6:30 PM CDT | Tornado Watch | SPC | Phillips | 6 hr |
| Apr 13, 7:00 PM CDT | Tornado Watch | SPC | Baylor, Briscoe, Childress, Collingsworth, Cottle, Crosby and 18 more | 5 hr |
| Apr 13, 9:15 PM CDT | Tornado Watch | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 31 more | 6 hr |
| Apr 14, 12:30 AM CDT | Severe Thunderstorm Watch | SPC | Bell, Blanco, Bosque, Burnet, Collin, Coryell and 34 more | 6 hr |
Nearby
Tornado Watches in Louisiana, 1999Tornado Watches in Texas, 1999Tornado Watches in Arkansas, 1999Every tornado watch in 1999
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.