Alert archive / Louisiana / Tornado Watches in 1998
Tornado Watch 82
The Storm Prediction Center issued this tornado watch at Mar 7, 1998, 3:45 AM CST for 36 parishes in Louisiana; 5 counties in Mississippi; 6 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 7, 1998, 3:45 AM CST (09:45 UTC)
- Expired
- Mar 7, 1998, 10:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 47 counties
Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Hancock County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Tyler County, TX
The radar
The Lake Charles radar (KLCH), 79 km from the middle of the area, began a volume at 09:45 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
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 3:51 AM CST | Severe Thunderstorm Warning | LCH | Cameron | 34 min |
| Mar 7, 3:51 AM CST | Severe Thunderstorm Warning | LIX | Washington | 59 min |
| Mar 7, 3:57 AM CST | Severe Thunderstorm Warning | LCH | Vermilion | 58 min |
| Mar 7, 4:11 AM CST | Severe Thunderstorm Warning | LCH | Jefferson | 49 min |
| Mar 7, 4:19 AM CST | Severe Thunderstorm Warning | LIX | Livingston | 36 min |
| Mar 7, 4:24 AM CST | Tornado Warning | LIX | Saint Tammany | 31 min |
| Mar 7, 4:31 AM CST | Severe Thunderstorm Warning | LCH | Orange | 44 min |
| Mar 7, 4:40 AM CST | Tornado Warning | LCH | Vermilion | 65 min |
| Mar 7, 4:55 AM CST | Severe Thunderstorm Warning | LCH | Acadia | 45 min |
| Mar 7, 4:56 AM CST | Tornado Warning | LIX | Ascension, Iberville | 34 min |
| Mar 7, 5:07 AM CST | Tornado Warning | LIX | Saint Tammany | 33 min |
| Mar 7, 5:11 AM CST | Severe Thunderstorm Warning | LCH | Beauregard | 44 min |
| Mar 7, 5:17 AM CST | Severe Thunderstorm Warning | LCH | Iberia | 63 min |
| Mar 7, 5:21 AM CST | Severe Thunderstorm Warning | LCH | Jefferson | 59 min |
| Mar 7, 5:32 AM CST | Severe Thunderstorm Warning | LIX | Hancock | 33 min |
| Mar 7, 5:33 AM CST | Severe Thunderstorm Warning | LCH | Orange | 47 min |
| Mar 7, 5:49 AM CST | Severe Thunderstorm Warning | LCH | Hardin | 31 min |
| Mar 7, 5:51 AM CST | Severe Thunderstorm Warning | LIX | Saint James | 34 min |
| Mar 7, 5:57 AM CST | Severe Thunderstorm Warning | LCH | Calcasieu | 43 min |
| Mar 7, 6:24 AM CST | Severe Thunderstorm Warning | LCH | Cameron | 61 min |
| Mar 7, 6:36 AM CST | Severe Thunderstorm Warning | LCH | Calcasieu | 49 min |
| Mar 7, 6:41 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 44 min |
| Mar 7, 6:45 AM CST | Flash Flood Warning | LCH | Calcasieu | 2 hr |
| Mar 7, 6:54 AM CST | Severe Thunderstorm Warning | LCH | Newton | 31 min |
| Mar 7, 7:50 AM CST | Severe Thunderstorm Warning | LCH | Jefferson Davis | 40 min |
| Mar 7, 8:10 AM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 35 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.8 hours before the alert went out and 78 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
- 904 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
164 WWUS9 KMKC 070934 SEL2 MKC WW 070934 LAZ000-MSZ000-071600- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 82 STORM PREDICTION CENTER NORMAN OK 334 AM CST SAT MAR 7 1998 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN LOUISIANA SOUTHERN MISSISSIPPI SOUTHEAST TEXAS AND ADJACENT COASTAL WATERS EFFECTIVE THIS SATURDAY MORNING FROM 345 AM UNTIL 1000 AM CST. TORNADOES...HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF PORT ARTHUR TEXAS TO 60 MILES EAST NORTHEAST OF NEW ORLEANS 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. DISCUSSION...INCREASING POTENTIAL FOR SUPERCELLS AND POSSIBLY TORNADOES THIS MORNING AS UPPER LEVEL VORT CENTER NOW APPROACHING HOU ENHANCES ASCENT ALONG OLD BOUNDARY STALLED E/W ACROSS WATCH AREA. VERTICAL SPEED AND DIRECTIONAL SHEAR SHOULD INCREASE IN RESPONSE TO BOTH THE HOU VORT AND LARGE SCALE INCREASE ASSOCIATED WITH CONTINUED EASTWARD MOTION OF 4 CORNERS UPPER TROUGH. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25025. ...CORFIDI 310,0943 311,0891 290,0891 290,0943
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 6:00 AM CST | Severe Thunderstorm Watch | SPC | Caldwell, Catahoula, Concordia, East Carroll, Franklin, LaSalle and 6 more | 5 hr |
| Mar 7, 8:45 AM CST | Tornado Watch | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Grant and 8 more | 5 hr |
| Mar 7, 12:30 PM CST | Severe Thunderstorm Watch | SPC | Caldwell, Catahoula, Concordia, East Carroll, Franklin, LaSalle and 6 more | 6 hr |
| Mar 7, 1:30 PM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 29 more | 6 hr |
| Mar 7, 3:30 PM CST | Tornado Watch | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Concordia, De Soto and 10 more | 4 hr |
| Mar 6, 8:30 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Coke, Concho, Crockett, Edwards, Glasscock and 15 more | 6 hr |
| Mar 7, 5:45 AM CST | Severe Thunderstorm Watch | SPC | Archer, Baylor, Callahan, Childress, Clay, Collin and 36 more | 5 hr |
Nearby
Tornado Watches in Louisiana, 1998Tornado Watches in Texas, 1998Tornado Watches in Mississippi, 1998Every tornado watch in 1998
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.