Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 171, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Jun 21, 1998, 1:40 PM CDT for Jackson County, Mississippi. It was in force for 60 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
- Jun 21, 1998, 1:40 PM CDT (18:40 UTC)
- Expired
- Jun 21, 1998, 2:40 PM CDT
- In force
- 60 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Jackson County, MS
The radar
The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 18:41 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.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.7 hours before the alert went out and 106 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
- 2768 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Jun 21, 10:50 AM CDT, 2 hours 50 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-210000- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1050 AM CDT SUN JUN 21 1998 VERY MOIST UNSTABLE AIR REMAINS OVER THE REGION TODAY. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER MUCH OF THE AREA THIS AFTERNOON. ANY THUNDERSTORMS WHICH MIGHT DEVELOP COULD PRODUCE HAIL AND WIND GUSTS IN EXCESS OF 50 MILES AN HOUR.
Special weather statement, Jun 21, 10:50 AM CDT, 2 hours 50 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-210000- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1050 AM CDT SUN JUN 21 1998 VERY MOIST UNSTABLE AIR REMAINS OVER THE REGION TODAY. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER MUCH OF THE AREA THIS AFTERNOON. ANY THUNDERSTORMS WHICH MIGHT DEVELOP COULD PRODUCE HAIL AND WIND GUSTS IN EXCESS OF 50 MILES AN HOUR.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 12:10 AM CDT | Severe Thunderstorm Warning | LIX | Saint Bernard | 60 min |
| Jun 21, 5:25 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans | 45 min |
| Jun 21, 6:24 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 36 min |
| Jun 21, 6:49 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena | 26 min |
| Jun 21, 4:01 PM CDT | Tornado Warning | LIX | Hancock | 49 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 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; radar from the NEXRAD Level II archive.