Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 73, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 13, 1999, 11:31 AM CST for Pike County, Mississippi. It was in force for 34 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
- Mar 13, 1999, 11:31 AM CST (17:31 UTC)
- Expired
- Mar 13, 1999, 12:05 PM CST
- In force
- 34 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Pike County, MS
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 13, 10:00 AM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.5 hours before the alert went out and 123 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
- 553 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 406 m²/s²
- 0-3 km storm-relative helicity
- 553 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
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 13, 10:05 AM CST, 1 hour 26 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-132301- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1005 AM CST SAT MAR 13 1999 ...A TORNADO WATCH IS IN EFFECT FOR SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI UNTIL 4 PM CST... ...A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI FOR TODAY... A LARGE SLOW MOVING UPPER LEVEL DISTURBANCE AND COLD FRONT WILL MOVE ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI THIS AFTERNOON. THE UPPER LEVEL DISTURBANCE IS PROVIDING A VERY FAVORABLE SETUP FOR SEVERE THUNDERSTORMS AND HEAVY RAIN TODAY. IN ADDITION...BECAUSE THE ATMOSPHERE IS SO MOIST AND UNSTABLE...AND THE LOW AND MIDDLE LEVEL WINDS PATTERN ARE FAVORABLE FOR SEVERE THUNDERSTORMS. SOME OF THESE THUNDERSTORMS COULD PRODUCE STRONG WINDS DAMAGING WINDS... LARGE HAIL AND TORNADOES. 2 TO 3 OF RAIN COULD FALL WITHIN A FEW HOURS PRODUCING SOME FLASH FLOODING OF HIGHWAYS. PEOPLE ARE URGED TO FOLLOW THE WEATHER CLOSELY TODAY AND BE PREPARED TO TAKE QUICK PROTECTIVE ACTION IF A SEVERE THUNDERSTORM...TORNADO OR FLASH FLOOD WARNING IS POSTED FOR THEIR PARISH OR COUNTY. FOR MORE WEATHER INFORMATION...PLEASE VISIT OUR HOMEPAGE 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 |
|---|---|---|---|---|
| Mar 13, 8:29 AM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee | 46 min |
| Mar 13, 8:50 AM CST | Tornado Warning | LIX | Pointe Coupee | 30 min |
| Mar 13, 9:00 AM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 35 min |
| Mar 13, 9:38 AM CST | Severe Thunderstorm Warning | LIX | East Feliciana, West Feliciana | 32 min |
| Mar 13, 10:07 AM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana | 48 min |
| Mar 13, 10:23 AM CST | Severe Thunderstorm Warning | LIX | Saint Helena | 42 min |
| Mar 13, 11:01 AM CST | Severe Thunderstorm Warning | LIX | Tangipahoa | 34 min |
| Mar 13, 1:07 PM CST | Tornado Warning | LIX | Tangipahoa | 33 min |
| Mar 13, 1:33 PM CST | Tornado Warning | LIX | Washington | 32 min |
| Mar 13, 3:46 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 34 min |
| Mar 13, 4:33 PM CST | Severe Thunderstorm Warning | LIX | Jefferson | 32 min |
| Mar 13, 5:40 PM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 30 min |
| Mar 13, 9:58 AM CST | Severe Thunderstorm Warning | LIX | Amite | 47 min |
| Mar 13, 10:13 AM CST | Tornado Warning | LIX | Amite | 37 min |
| Mar 13, 11:37 AM CST | Severe Thunderstorm Warning | LIX | Walthall | 33 min |
| Mar 13, 12:22 PM CST | Flash Flood Warning | LIX | Pike | 2 hr |
| Mar 13, 2:16 PM CST | Flash Flood Warning | LIX | Pike | 74 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning 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.