Alert archive / Louisiana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 17, NWS New Orleans, LA

March 9, 19944 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 9, 1994, 8:06 AM CST for 4 parishes in Louisiana. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Mar 9, 1994, 8:06 AM CST (14:06 UTC)
Expired
Mar 9, 1994, 9:15 AM CST
In force
69 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Ascension Parish, LA, East Baton Rouge Parish, LA, Iberville Parish, LA, Livingston Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.1 hours before the alert went out and 127 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 1994-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 504 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 1994-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.1939587897Sfc1 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
504 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

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, Mar 9, 5:08 AM CST, 2 hours 58 minutes before
LAZ033>036-046>050-091300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
505 AM CST WED MAR 9 1994

...FLASH FLOOD WATCH IN EFFECT TODAY...
...THUNDERSTORMS WITH STRONG WIND GUSTS AND VERY HEAVY RAIN APPROACHING
PORTIONS OF EAST CENTRAL LOUISIANA...

RADAR SHOWED A LARGE AREA OF RAIN WITH A FEW STRONG THUNDERSTORMS FROM
ALEXANDRIA TO EAST OF LAKE CHARLES.  THE STRONGEST THUNDERSTORMS WERE
BETWEEN LAKE CHARLES AND VILLE PLATTE MOVING EAST AT 45 MPH.  THESE
STRONG THUNDERSTORMS PRODUCED WIND GUSTS OVER 55 MPH AT LAKE CHARLES.
PEOPLE IN AVOYELLES AND ST LANDRY SHOULD BE ALERT AND READY FOR QUICK
ACTION IF SEVERE WEATHER IS SIGHTED.

THE HEAVY RAIN WILL CAUSE FLOODING OF STREETS...UNDERPASSES AND LOW
LYING AREAS.  MOTORISTS SHOULD EXERCISE CAUTION WHILE DRIVING THIS
MORNING.
Special weather statement, Mar 9, 7:56 AM CST, 10 minutes before
LAZ033>036-046>050-091500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
755 AM CST WED MAR 9 1994

...FLASH FLOOD WATCH IN EFFECT TODAY...
...THUNDERSTORMS WITH STRONG WIND GUSTS AND VERY HEAVY RAIN
MOVING THROUGH THE BATON ROUGE METRO AREA...

RADAR SHOWED A BAND OF STRONG THUNDERSTORMS NEAR GREENSBURG SOUTH TO
BATON ROUGE TO WHITE CASTLE...MOVING EAST AT 40 MPH.  THESE STRONG
THUNDERSTORMS WILL PRODUCE STRONG WIND GUSTS WITH VERY HEAVY RAIN AND
FRQUENT LIGHTNING.

THE HEAVY RAIN WILL CAUSE FLOODING OF STREETS...UNDERPASSES AND LOW
LYING AREAS.  MOTORISTS SHOULD EXERCISE CAUTION WHILE DRIVING THIS
MORNING.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 9, 6:02 AM CSTSevere Thunderstorm WarningLIXSaint Landry43 min
Mar 9, 6:33 AM CSTSevere Thunderstorm WarningLIXIberia, Saint Martin57 min
Mar 9, 8:11 AM CSTSevere Thunderstorm WarningLIXTangipahoa64 min
Mar 9, 8:47 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington58 min
Mar 9, 9:12 AM CSTSevere Thunderstorm WarningLIXTangipahoa48 min
Mar 9, 9:42 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington63 min
Mar 9, 10:38 AM CSTSevere Thunderstorm WarningLIXOrleans, Saint Tammany67 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1994Every severe thunderstorm warning in 1994

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.