Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 97, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 7, 1998, 4:14 PM CST for Assumption Parish, Louisiana. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 7, 1998, 4:14 PM CST (22:14 UTC)
- Expired
- Mar 7, 1998, 5:15 PM CST
- In force
- 61 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Assumption Parish, LA
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 7, 1:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.2 hours before the alert went out and 137 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
- 520 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 325 m²/s²
- 0-3 km storm-relative helicity
- 480 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Mar 7, 10:24 AM CST, 5 hours 50 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-080600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1024 AM CST SAT MAR 7 1998 ...A FLASH FLOOD WATCH IS IN EFFECT FOR TODAY THROUGH TONIGHT... ...SEVERE THUNDERSTORMS AND TORRENTIAL RAINS CAN BE EXPECTED THROUGH TONIGHT... AN UNSTABLE AIRMASS ACROSS THE GULF SOUTH IS BEING ACTIVATED BY AN APPROACHING STRONG LOW PRESSURE SYSTEM MOVING FROM THE SOUTHWEST UNITED STATES. ABUNDANT TROPICAL MOISTURE MOVING OFF THE GULF WILL PROVIDE THE AREA WITH TORRENTIAL RAINS WHENEVER THUNDERSTORMS DEVELOP. WHILE THE STORMS WILL MAINTAIN MOVEMENT OF 30 TO 50 MPH THROUGHOUT THE DAY...REPEAT DEVELOPMENT OVER THE SAME AREA IS POSSIBLE...CREATING A FLOOD POTENTIAL FOR THE AREA. THUNDERSTORMS THIS AFTERNOON WILL ALSO BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS...ALONG WITH POSSIBLE ISOLATED TORNADOES. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE COMMON TODAY... WHICH WILL OVERWHELM DRAINAGE CAPACITIES WHERE THE HEAVIER RAINS OCCUR. EMERGENCY OPERATIONS COORDINATORS ARE URGED TO STAFF THEIR OFFICES ACCORDINGLY FOR HEAVY OPERATIONS TODAY. STORM SPOTTERS AND SKYWARN PERSONNEL ARE REQUESTED FOR ACTIVATION THIS AFTERNOON. PLEASE REFER ANY WEATHER REPORTS TO THE LOCAL LAW ENFORCEMENT AGENCIES OR THE NATIONAL WEATHER SERVICE. PERSONS ACROSS SOUTHEAST AND SOUTHCENTRAL LOUISIANA AND SOUTH MISSISSIPPI SHOULD CLOSELY MONITOR TODAYS INCLEMENT WEATHER. ANTICIPATE WATCHES AND WARNINGS TO BE ISSUED BY THE NATIONAL WEATHER SERVICE. MEANWHILE...REVIEW SEVERE THUNDERSTORM PREPAREDNESS PROCEDURES. KNOW WHAT TO DO IN THE EVENT OF SEVERE THUNDERSTORMS... TORNADOES OR FLOODING...AND ACT QUICKLY IF YOUR AREA IS AFFECTED OR WARNED.
Special weather statement, Mar 7, 10:24 AM CST, 5 hours 50 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-080600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1024 AM CST SAT MAR 7 1998 ...A FLASH FLOOD WATCH IS IN EFFECT FOR TODAY THROUGH TONIGHT... ...SEVERE THUNDERSTORMS AND TORRENTIAL RAINS CAN BE EXPECTED THROUGH TONIGHT... AN UNSTABLE AIRMASS ACROSS THE GULF SOUTH IS BEING ACTIVATED BY AN APPROACHING STRONG LOW PRESSURE SYSTEM MOVING FROM THE SOUTHWEST UNITED STATES. ABUNDANT TROPICAL MOISTURE MOVING OFF THE GULF WILL PROVIDE THE AREA WITH TORRENTIAL RAINS WHENEVER THUNDERSTORMS DEVELOP. WHILE THE STORMS WILL MAINTAIN MOVEMENT OF 30 TO 50 MPH THROUGHOUT THE DAY...REPEAT DEVELOPMENT OVER THE SAME AREA IS POSSIBLE...CREATING A FLOOD POTENTIAL FOR THE AREA. THUNDERSTORMS THIS AFTERNOON WILL ALSO BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS...ALONG WITH POSSIBLE ISOLATED TORNADOES. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE COMMON TODAY... WHICH WILL OVERWHELM DRAINAGE CAPACITIES WHERE THE HEAVIER RAINS OCCUR. EMERGENCY OPERATIONS COORDINATORS ARE URGED TO STAFF THEIR OFFICES ACCORDINGLY FOR HEAVY OPERATIONS TODAY. STORM SPOTTERS AND SKYWARN PERSONNEL ARE REQUESTED FOR ACTIVATION THIS AFTERNOON. PLEASE REFER ANY WEATHER REPORTS TO THE LOCAL LAW ENFORCEMENT AGENCIES OR THE NATIONAL WEATHER SERVICE. PERSONS ACROSS SOUTHEAST AND SOUTHCENTRAL LOUISIANA AND SOUTH MISSISSIPPI SHOULD CLOSELY MONITOR TODAYS INCLEMENT WEATHER. ANTICIPATE WATCHES AND WARNINGS TO BE ISSUED BY THE NATIONAL WEATHER SERVICE. MEANWHILE...REVIEW SEVERE THUNDERSTORM PREPAREDNESS PROCEDURES. KNOW WHAT TO DO IN THE EVENT OF SEVERE THUNDERSTORMS... TORNADOES OR FLOODING...AND ACT QUICKLY IF YOUR AREA IS AFFECTED OR WARNED.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 3:51 AM CST | Severe Thunderstorm Warning | LIX | Washington | 59 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, 4:56 AM CST | Tornado Warning | LIX | Ascension, Iberville | 34 min |
| Mar 7, 5:07 AM CST | Tornado Warning | LIX | Saint Tammany | 33 min |
| Mar 7, 5:51 AM CST | Severe Thunderstorm Warning | LIX | Saint James | 34 min |
| Mar 7, 6:41 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 44 min |
| Mar 7, 8:10 AM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 35 min |
| Mar 7, 4:20 PM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 30 min |
| Mar 7, 4:41 PM CST | Flash Flood Warning | LIX | Saint Bernard | 4 hr |
| Mar 7, 4:46 PM CST | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 34 min |
| Mar 7, 5:00 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 35 min |
| Mar 7, 5:44 PM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 61 min |
| Mar 7, 5:32 AM CST | Severe Thunderstorm Warning | LIX | Hancock | 33 min |
| Mar 7, 6:09 AM CST | Tornado Warning | LIX | Harrison | 31 min |
| Mar 7, 11:43 AM CST | Flash Flood Warning | LIX | Jackson | 3 hr |
| Mar 7, 12:07 PM CST | Flash Flood Warning | LIX | Hancock, Harrison | 2 hr |
| Mar 7, 4:41 PM CST | Flash Flood Warning | LIX | Hancock, Harrison | 4 hr |
| Mar 7, 4:41 PM CST | Flash Flood Warning | LIX | Jackson | 4 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm warning 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.