Alert archive / Mississippi / Tornado Warnings in 1999
Tornado Warning 39, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Jun 25, 1999, 12:40 PM CDT for Harrison County, Mississippi. It was in force for 20 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
- Jun 25, 1999, 12:40 PM CDT (17:40 UTC)
- Expired
- Jun 25, 1999, 1:00 PM CDT
- In force
- 20 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Harrison County, MS
The radar
The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 17:40 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, 5.7 hours before the alert went out and 62 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.
- Mixed-layer CAPE
- 1109 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 874 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
659 WFUS1 KNEW 251742 RRA TORNEW GMZ555-MSC047-251800- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1240 PM CDT FRI JUN 25 1999 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A... * TORNADO WARNING FOR - EXTREME SOUTHERN HARRISON COUNTY IN SOUTHERN MISSISSIPPI * UNTIL 100 PM CDT * AT 1235 PM CDT... SHERIFFS DEPARTMENT REPORTED A WATERSPOUT APPROACHING THE VICINITY OF THE GRAND CASINO IN GULFPORT. DRIFTING SLOWLY TO THE THE NORTHEAST. IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS 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, Jun 25, 12:10 PM CDT, 30 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-260100- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1210 PM CDT FRI JUN 25 1999 AN ABUNDANCE OF TROPICAL MOISTURE ACROSS THE REGION IS BECOMING DISTURBED BY A WEAK TROUGH OF LOW PRESSURE DRIFTING INTO THE STATE FROM ARKANSAS. TROPICAL RAINSHOWERS AND THUNDERSTORMS WILL BECOME WIDESPREAD THROUGHOUT THE AFTERNOON AND EVENING. HOWEVER...SEVERE THUNDERSTORMS ARE NOT EXPECTED TODAY. THE MAIN THREAT WILL BE BRIEF HEAVY RAINFALL AT THE RATES OF ONE TO TWO INCHES PER HOUR...OCCASIONAL LIGHTNING AND WIND GUSTS OF 30 TO 40 MPH FROM SOME OF THE STRONGER STORMS. WATERSPOUTS MAY ALSO FORM OVER LARGE BODIES OF WATER.
Special weather statement, Jun 25, 12:10 PM CDT, 30 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-260100- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1210 PM CDT FRI JUN 25 1999 AN ABUNDANCE OF TROPICAL MOISTURE ACROSS THE REGION IS BECOMING DISTURBED BY A WEAK TROUGH OF LOW PRESSURE DRIFTING INTO THE STATE FROM ARKANSAS. TROPICAL RAINSHOWERS AND THUNDERSTORMS WILL BECOME WIDESPREAD THROUGHOUT THE AFTERNOON AND EVENING. HOWEVER...SEVERE THUNDERSTORMS ARE NOT EXPECTED TODAY. THE MAIN THREAT WILL BE BRIEF HEAVY RAINFALL AT THE RATES OF ONE TO TWO INCHES PER HOUR...OCCASIONAL LIGHTNING AND WIND GUSTS OF 30 TO 40 MPH FROM SOME OF THE STRONGER STORMS. WATERSPOUTS MAY ALSO FORM OVER LARGE BODIES OF WATER.
Nearby
Tornado Warnings in Mississippi, 1999Every tornado warning in 1999Tornadoes in 1999
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.