Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 295, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Nov 1, 1997, 2:56 PM CST for Saint John the Baptist Parish, Louisiana. It was in force for 29 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
- Nov 1, 1997, 2:56 PM CST (20:56 UTC)
- Expired
- Nov 1, 1997, 3:25 PM CST
- In force
- 29 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Nov 1, 1:45 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.9 hours before the alert went out and 75 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
- 2011 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 6.9
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, Nov 1, 10:57 AM CST, 3 hours 59 minutes before
LAZ049-050-057-058-040-038-039-MSZ077-071-011600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1100 AM CST MON OCT 27 1997 ...ISOLATED SEVERE THUNDERSTORMS POSSIBLE MAINLY FOR SOUTHWEST MISSISSIPPI THIS AFTERNOON... VERY UNSTABLE ATMOSPHERIC CONDITIONS AHEAD OF A STRONG COLD FRONT MOVING THROUGH THE AREA WILL CAUSE SCATTERED THUNDERSTORM ACTIVITY OVER MISSISSIPPI AND PARTS OF SOUTHEAST LOUISIANA NORTH OF LAKE PONTCHARTRAIN. A FEW OF THESE THUNDERSTORMS MAY BECOME SEVERE IN SOUTHWEST MISSISSIPPI INCLUDING THE MCCOMB AREA. IF THUNDERSTORMS BECOME SEVERE..EXPECT STRONG GUSTY WINDS..HAIL AND FREQUENT LIGHTNING. AS THE COLD FRONT PASSES THROUGH THE AREA LATE THIS AFTEBRNOON AND EARLY THIS EVENING..THUNDERSTORM ACTIVITY WILL END AS COOLER AND DRIER AIR PUSHES INTO THE AREA.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 1, 1:00 PM CST | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 60 min |
| Nov 1, 1:17 PM CST | Tornado Warning | LIX | Tangipahoa, Washington | 43 min |
| Nov 1, 1:42 PM CST | Severe Thunderstorm Warning | LIX | Livingston | 63 min |
| Nov 1, 4:36 PM CST | Severe Thunderstorm Warning | LIX | Orleans, Saint Bernard | 29 min |
| Nov 1, 1:51 PM CST | Severe Thunderstorm Warning | LIX | Pearl River | 39 min |
| Nov 1, 3:23 PM CST | Severe Thunderstorm Warning | LIX | Jackson | 52 min |
| Nov 1, 3:34 PM CST | Severe Thunderstorm Warning | LIX | Jackson | 41 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1997Every severe thunderstorm warning in 1997
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.