Alert archive / Mississippi / Tornado Watches in 1999
Tornado Watch 11
The Storm Prediction Center issued this tornado watch at Jan 8, 1999, 8:00 PM CST for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 8, 1999, 8:00 PM CST (02:00 UTC)
- Expired
- Jan 9, 1999, 2:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 61 counties
Lamar County, AL, Marion County, AL, Winston County, AL, Chicot County, AR, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Oktibbeha County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Jasper County, TX, Newton County, TX, Sabine County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 139 km from the middle of the area, began a volume at 02:03 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 8, 8:04 PM CST | Severe Thunderstorm Warning | JAN | Chicot | 36 min |
| Jan 8, 8:12 PM CST | Severe Thunderstorm Warning | JAN | West Carroll | 33 min |
| Jan 8, 8:20 PM CST | Severe Thunderstorm Warning | JAN | East Carroll | 45 min |
| Jan 8, 8:20 PM CST | Severe Thunderstorm Warning | JAN | Issaquena, Washington | 45 min |
| Jan 8, 8:25 PM CST | Severe Thunderstorm Warning | JAN | Carroll, Grenada | 50 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 2.0 hours before the alert went out and 176 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
- 50 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1087 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Tornado Watches in Mississippi, 1999Tornado Watches in Louisiana, 1999Tornado Watches in Texas, 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.