Alert archive / Mississippi / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 25, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 3, 2007, 6:08 PM CDT for Walthall County, Mississippi. It was in force for 37 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
- Apr 3, 2007, 6:08 PM CDT (23:08 UTC)
- Expired
- Apr 3, 2007, 6:45 PM CDT
- In force
- 37 min
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
County Walthall County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 11.1 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.
- Mixed-layer CAPE
- 792 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 767 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- -17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 3, 2:58 PM CDT, 3 hours 10 minutes earlier.
Area forecast discussion, Apr 3, 2:58 PM CDT, 3 hours 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 258 PM CDT TUE APR 3 2007 .SHORT TERM... EARLY THIS AFTERNOON A COLD FRONT STRETCHED FROM ILLINOIS INTO TEXAS WITH AN UPPER-LEVEL TROUGH OVER THE NORTHERN PLAINS STATES. THE JET STREAM STRETCHED FROM SOUTH TEXAS INTO THE SOUTHEASTERN STATES. THE MAIN THREAT FOR STRONG TO SEVERE THUNDERSTORMS WILL REMAIN CLOSER TO THE FRONT NORTH/NORTHWEST OF OUR AREA. HOWEVER THERE COULD BE A FEW STRONG TO SEVERE STORMS THIS AFTERNOON. THE 18Z SOUNDING SHOWED AN LI OF -5.4 AND CAPE OF 1703 J/KG. SURFACE DEW POINTS WERE IN THE MID-UPPER 60S. THE MAIN THREATS WILL BE HEAVY RAINS AND HAIL. THE FRONT SHOULD PUSH SOUTH INTO OUR PCWA EARLY TOMORROW. BEHIND THE FRONT WINDS WILL PICK UP FROM THE NORTH AND LEAD TO SMALL CRAFT ADVISORY CONDITIONS ACROSS THE TIDAL LAKES AND GULF COASTAL WATERS. .LONG TERM... REINFORCING HIGH PRESSURE WILL PUSH INTO THE AREA THIS WEEKEND. TEMPS MAY FALL TO NEAR 40F IN MISSISSIPPI AND EAST-CENTRAL LOUISIANA SATURDAY THROUGH MONDAY MORNINGS. && .PRELIMINARY POINT TEMPS/POPS... MCB 61 75 46 69 / 30 30 10 10 BTR 63 76 49 70 / 30 30 10 10 MSY 66 79 57 71 / 20 30 10 10 GPT 66 79 50 70 / 20 30 10 10 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. && 25
Hazardous weather outlook, Apr 3, 11:00 AM CDT, 7 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1100 AM CDT TUE APR 3 2007 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-041100- AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-HANCOCK- HARRISON-IBERVILLE-JACKSON-LIVINGSTON-LOWER JEFFERSON- LOWER LAFOURCHE-LOWER PLAQUEMINES-LOWER ST BERNARD-LOWER TERREBONNE- ORLEANS-PEARL RIVER-PIKE-POINTE COUPEE-ST CHARLES-ST HELENA-ST JAMES- ST JOHN THE BAPTIST-ST TAMMANY-TANGIPAHOA-UPPER JEFFERSON- UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD-UPPER TERREBONNE- WALTHALL-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA-WILKINSON- 1100 AM CDT TUE APR 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF GULF OF MEXICO...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...THIS AFTERNOON AND TONIGHT UNSEASONABLY MOIST AIRMASS OVER THE GULF STATES WILL ALLOW FOR SCATTERED THUNDERSTORMS TO DEVELOP WITH DAYTIME HEATING. WHILE SEVERE THUNDERSTORMS ARE NOT EXPECTED...LOCALLY HEAVY RAINFALL MAY RESULT FROM SLOW MOVING STORMS...POTENTIALLY CAUSING SOME FLOODING OF LOW LYING AND POORLY DRAINED AREAS THROUGH THIS AFTERNOON. SMALL HAIL ALSO IS POSSIBLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS ARE EXPECTED IN ADVANCE OF A COLD FRONT WEDNESDAY. NORTHEAST WINDS WILL INCREASE TO 20 TO 25 KNOTS BEHIND THE FRONTAL PASSAGE WEDNESDAY NIGHT TO EARLY THURSDAY MORNING ACROSS THE GULF COASTAL WATERS AND TIDAL LAKES. OTHERWISE...NO WEATHER HAZARDS ARE EXPECTED THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 3:48 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 42 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2007Every severe thunderstorm warning in 2007
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.