Alert archive / Louisiana / Tornado Watches in 1999
Tornado Watch 92
The Storm Prediction Center issued this tornado watch at Mar 13, 1999, 4:00 PM CST for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 1999, 4:00 PM CST (22:00 UTC)
- Expired
- Mar 13, 1999, 9:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Baldwin County, AL, Mobile County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Tammany Parish, LA, Washington Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 4:33 PM CST | Severe Thunderstorm Warning | LIX | Jefferson | 32 min |
| Mar 13, 5:40 PM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 30 min |
| Mar 13, 5:43 PM CST | Tornado Warning | MOB | Mobile | 32 min |
| Mar 13, 6:45 PM CST | Tornado Warning | MOB | Mobile | 60 min |
| Mar 13, 6:58 PM CST | Flash Flood Warning | MOB | Mobile, Washington | 3 hr |
| Mar 13, 7:13 PM CST | Severe Thunderstorm Warning | LIX | Jackson | 32 min |
| Mar 13, 7:19 PM CST | Severe Thunderstorm Warning | MOB | Baldwin | 71 min |
| Mar 13, 7:46 PM CST | Severe Thunderstorm Warning | MOB | Mobile | 74 min |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 90 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
- 553 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 406 m²/s²
- 0-3 km storm-relative helicity
- 553 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
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 |
|---|---|---|---|---|
| Mar 13, 10:00 AM CST | Tornado Watch | SPC | Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 2 more | 5 hr |
| Mar 12, 10:30 PM CST | Tornado Watch | SPC | Acadia, Allen, Assumption, Beauregard, Calcasieu, Cameron and 13 more | 7 hr |
| Mar 13, 5:00 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 26 more | 5 hr |
Nearby
Tornado Watches in Louisiana, 1999Tornado Watches in Mississippi, 1999Tornado Watches in Florida, 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.