Alert archive / Louisiana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 21, NWS New Orleans, LA

March 9, 1994Saint Tammany Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 9, 1994, 9:42 AM CST for Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 63 min.

The area

The counties it named.

The facts

Issued: Mar 9, 1994, 9:42 AM CST (15:42 UTC)
Expired: Mar 9, 1994, 10:45 AM CST
In force: 63 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Saint Tammany Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.7 hours before the alert went out and 51 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: 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

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 091545
SVRNEW
LAC103-117-091645-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
942 AM CST WED MAR 9 1994
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 AM CST
FOR RESIDENTS IN THE FOLLOWING PARISHESS...
 
IN SOUTHEAST LOUISIANA
 
   ...ST.TAMMANY PARISH...EASTERN WASHINGTON PARISH
 
AT 940 AM NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF POSSIBLE
SEVERE THUNDERSTORMS FROM JUST EAST OF BOGALUSA TO NEAR PONTCHATOULA.
THE LINE WAS MOVING EAST AROUND 30 MPH. THESE THUNDERSTORMS PRODUCED
WIND DAMAGE TO A BARN NEAR LORANGER IN TANGIPAHOA PARISH AROUND 900 AM.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
 
&

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, 4 hours 34 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, 1 hour 46 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.

Local storm report, Mar 9, 9:11 AM CST, 31 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
845 AM CST WED MAR 9 1994

TIME/CST      LOCATION/PARISH   REPORT

SHERIFF/S OFFICES...

640  AM   ST LANDRY          TREE DOWN HIGHWAY 71 5 MILES NORTHWEST
          PARISH             KROTZ SPRINGS.
640  AM   POINTE COUPEE      TREE/POWER LINE DAMAGE AT MORGANZA...
                             LIVONIA...ROUGON AND VENTRESS.
645  AM   IBERVILLE          TREE DOWN ROSEDALE HIGHWAY 77
          PARISH
702  AM   EAST FELICIANA     STATE POLICE REPORT DAMAGE TO TOWER
          PARISH             AT JACKSON
720  AM   EAST FELICIANA     POSSIBLE FUNNEL CLOUD NEAR PORT HUDSON.
          PARISH
725  AM   EAST FELICIAN      HIGHWAY 68 NEAR JACKSON POSSIBLE TORNADO
                             NO INJURIES...TREE ON HOUSE

810 AM   LIVINGSTON          TREES/POWER LINE DOWN...2 MILES WEST OF
                             LIVINSTON...JUST NORTHWEST OF WALKER...
                          j   3 MILES SOUTH WALKER...IN LIVINGSTON.

815 AM    IBERVILLE          NUMEROUS REPORTS OF TREES/POWER LINES DOWN.
                             SOME STREET FLOODING SCATTERED ABOUT.
                             ALL OCCURED AROUND 7 AM.

Special weather statement, Mar 9, 9:25 AM CST, 17 minutes before

LAZ033>036-046>050-091500-

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

...FLASH FLOOD WATCH IN EFFECT TODAY...
...TORNADO WATCH IN EFFECT UNTIL 1 PM...

RADAR SHOWED A BAND OF STRONG THUNDERSTORMS EAST OF KENTWOOD SOUTH
TO DONALDSONVILLE...MOVING EAST AT 40 MPH.  ELSEWHERE RAIN AND A FEW
THUNDERSTORMS CONTINUED FROM ST JOSEPH TO LAFAYETTE THROUGH BATON ROUGE
TO HAMMMOND.

PEOPLE OF EAST CENTRAL LOUISIANA CAN EXPECT RAIN AND THUNDERSTORMS
TODAY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 6:02 AM CST	Severe Thunderstorm Warning	LIX	Saint Landry	43 min
Mar 9, 6:33 AM CST	Severe Thunderstorm Warning	LIX	Iberia, Saint Martin	57 min
Mar 9, 8:06 AM CST	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston	69 min
Mar 9, 8:11 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	64 min
Mar 9, 8:47 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	58 min
Mar 9, 9:12 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	48 min
Mar 9, 10:38 AM CST	Severe Thunderstorm Warning	LIX	Orleans, Saint Tammany	67 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1994 Every 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.