Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 263, NWS New Orleans, LA

August 31, 1997Jackson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 31, 1997, 4:16 PM CDT for Jackson County, Mississippi. It was in force for 59 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
Aug 31, 1997, 4:16 PM CDT (21:16 UTC)
Expired
Aug 31, 1997, 5:15 PM CDT
In force
59 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 21:16 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, 9.3 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.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 1997-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1784 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 1997-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1784 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
1106 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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, Aug 31, 10:30 AM CDT, 5 hours 46 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-011600-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
1030 AM CDT SUN AUG 31 1997

HIGH PRESSURE WILL DRIFT WEST FROM LOUISIANA TO TEXAS TODAY. AN
UPPER LEVEL LOW PRESSURE TROUGH WILL MOVE SOUTH AND OVER MISSISSIPPI
AND EASTERN LOUISIANA THIS AFTERNOON AND TONIGHT. THE AIRMASS HAS
INCREASED MOISTURE IN THE LOWER LEVELS...INCREASED INSTABILITY AND
WEAK SHEAR ALOFT WHICH SHOULD CONTRIBUTE TO THE DEVELOPMENT OF
SCATTERED AFTERNOON AND EVENING THUNDERSTORMS OVER THE AREA. A FEW
OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE STRONG GUSTY
WINDS ALONG WITH HEAVY RAINFALL AND NUMEROUS LIGHTNING DISCHARGES.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 31, 3:17 PM CDTSevere Thunderstorm WarningLIXHarrison58 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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; radar from the NEXRAD Level II archive.