Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 194, NWS New Orleans, LA

July 7, 1997Walthall County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jul 7, 1997, 5:40 PM CDT for Walthall County, Mississippi. It was in force for 35 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: Jul 7, 1997, 5:40 PM CDT (22:40 UTC)
Expired: Jul 7, 1997, 6:15 PM CDT
In force: 35 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Walthall County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.7 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 924 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 49 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

Local storm report, Jul 7, 1:16 PM CDT, 4 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORTS
NATIONAL WEATHER SERVICE NEW ORLEANS LA
115 PM CDT MON JUL  7 1997

TIME(CDT)  .....CITY LOCATION...... STATE ...EVENT/REMARKS...
           ....COUNTY LOCATION......

1215 PM    5 SE CHALMETTE            LA   FUNNEL CLOUDS
07/07/97   ST. BERNARD                    NUMEROUS REPORTS OF VISUAL
                                          OBSERVATIONS OF A FEW FUNNEL
                                          CLOUDS BETWEEN CHALMETTE AND
                                          VIOLET. UNDETERMINED IF THE
                                          FUNNELS EVER TOUCHED DOWN BUT
                                          WERE REPORTED TO EXTEND CLOSE
                                          TO THE GROUND AT 1220 PM.

1220 PM    LAKE SALVADOR             LA   FUNNEL CLOUD
07/07/97   ST. CHARLES                    POSSIBLE WATER SPOUT OBSERVED.
                                          RELAYED REPORT BY WDSU-TV6
                                          METEOROLOGIST.

0100 PM    VIOLET                    LA   FLOODING
07/07/97   ST. BERNARD                    FLOODING OF STREETS REPORTED
                                          BY VIOLET FIRE DEPARTMENT.

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 12:22 PM CDT	Tornado Warning	LIX	Saint Bernard	38 min
Jul 7, 12:27 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Saint Charles	33 min
Jul 7, 1:40 PM CDT	Flash Flood Warning	LIX	Orleans, Plaquemines, Saint Bernard	2 hr
Jul 7, 3:39 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	51 min
Jul 7, 2:31 PM CDT	Flash Flood Warning	LIX	Harrison	119 min
Jul 7, 3:53 PM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	52 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1997 Every 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.