Alert archive / Louisiana / Tornado Warnings in 1998

Tornado Warning 37, NWS New Orleans, LA

November 10, 1998Washington Parish, Louisiana; Walthall County, Mississippi

NWS New Orleans, LA issued this tornado warning at Nov 10, 1998, 11:39 AM CST for Washington Parish, Louisiana; Walthall County, Mississippi. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Nov 10, 1998, 11:39 AM CST (17:39 UTC)
Expired: Nov 10, 1998, 12:10 PM CST
In force: 31 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Washington Parish, LA, Walthall County, MS

What was reported inside it

Time	Report	Where	Remark
Nov 10, 12:00 PM CST	Thunderstorm Wind	Mt Hermon, LA	Several trees were blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 10, 11:15 AM CST	Tornado Watch	SPC	5 hr
Nov 10, 10:00 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.7 hours before the alert went out and 91 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: 967 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 471 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

697 
WFUS1 KNEW 101737 RRA
TORNEW
LAC117-MSC147-101810-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1139 AM CST TUE NOV 10 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A...

* TORNADO WARNING FOR
   - NORTHERN WASHINGTON PARISH IN SOUTHEASTERN LOUISIANA
   - SOUTHERN WALTHALL COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 1210 PM CST

* AT 1133 AM CST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  WITH A POSSIBLE TORNADO IN THE VICINITY OF MT HERMON IN
  NORTHWEST WASHINGTON PARISH...MOVING EAST NORTHEAST AROUND
  30 MPH.

* SOME LOCATIONS IN AND NEAR THE PATH OF THIS TORNADO ARE...
  DEXTER AROUND 1150 AM CST
  THOMAS AROUND 1150 AM CST

IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM
AWAY FROM WINDOWS

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
DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

What forecasters said that day

The local office's own words before this tornado 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, Nov 10, 10:20 AM CST, 1 hour 19 minutes before

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-111600-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1020 AM CST TUE NOV 10 1998

STRONG COLD FRONT MOVING ACROSS THE LOCAL REGION WILL PRODUCE
THUNDERSTORMS. SOME OF THESE THUNDERSTORMS WILL BE SEVERE IN
SOUTHEAST LOUISIANA AND SOUTHWEST MISSISSIPPI THROUGH THIS AFTERNOON
WITH FREQUENT LIGHTNINGS...POTENTIAL DAMAGING WINDS AND SMALL HAIL.
THE STORM WILL CONTINUE TO MOVE EAST AND AFFECT COASTAL MISSISSIPPI
THROUGH THE EVENING HOURS. THE ATMOSPHERIC CONDITIONS OVER THE
REGION WILL STABILIZE BY LATE TONIGHT AS THE COLD FRONT IS EXPECTED
TO MOVE OUT FROM THE LOCAL AREAS.

OUR WEB SITE PROVIDES MORE WEATHER INFORMATION AT:
HTTP://WWW.SRH.NOAA.GOV/LIX (ALL LOWER CASE)

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 10, 10:29 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena	46 min
Nov 10, 11:03 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	47 min
Nov 10, 11:18 AM CST	Severe Thunderstorm Warning	LIX	Iberville	47 min
Nov 10, 11:24 AM CST	Severe Thunderstorm Warning	LIX	Washington	46 min
Nov 10, 12:00 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	35 min
Nov 10, 12:14 PM CST	Tornado Warning	LIX	Washington	36 min
Nov 10, 1:07 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	63 min
Nov 10, 1:59 PM CST	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	46 min
Nov 10, 2:07 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	48 min
Nov 10, 3:12 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	48 min
Nov 10, 3:27 PM CST	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	33 min
Nov 10, 12:42 PM CST	Tornado Warning	LIX	Pearl River	48 min
Nov 10, 1:37 PM CST	Severe Thunderstorm Warning	LIX	Pearl River	33 min

Nearby

Tornado Warnings in Louisiana, 1998 Tornado Warnings in Mississippi, 1998 Every tornado warning in 1998 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.