Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 149, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 21, 1997, 1:06 PM CDT for Pike County, Walthall County, Mississippi. It was in force for 69 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
- May 21, 1997, 1:06 PM CDT (18:06 UTC)
- Expired
- May 21, 1997, 2:15 PM CDT
- In force
- 69 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Pike County, MS, Walthall County, MS
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 1:08 PM CDT | Thunderstorm Wind | Summit, MS | Civil Defense director reported several trees were downed by wind gusts. |
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 nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.1 hours before the alert went out and 114 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
- 1274 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 211808 SVRNEW MSC113-147-211915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 106 PM CDT WED MAY 21 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 215 PM CDT FOR RESIDENTS IN THE FOLLOWING LOCATIONS... IN SOUTH MISSISSIPPI ...PIKE COUNTY...WALTHALL COUNTY AT 105 PM CDT RADAR SHOWED A LARGE CLUSTER OF THUNDERSTORMS NEAR MCCOMB MOVING SOUTHEAST ABOUT 15 MPH. THESE THUNDERSTORM WILL MOVE THROUGH THE TOWNS OF MCCOMB AND TYLERTOWN DURING THE NEXT HOUR. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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, May 21, 11:29 AM CDT, 1 hour 37 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-220100- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1115 AM CDT WED MAY 21 1997 ...HEAVY RAIN LIKELY IN SCATTERED LOCATIONS ACROSS SOUTHEAST...EAST CENTRAL LOUISIANA...AND SOUTH MISSISSIPPI MAINLY THIS AFTERNOON AND THURSDAY... THE ATMOSPHERE OVER THE REGION REMAINS UNSTABLE. A COMBINATION OF AFTERNOON HEATING AND A STATIONARY FRONT...EXTENDING FROM NORTH OF LAKE CHARLES TO NEAR MCCOMB MISSISSIPPI AND CONTINUING EAST...WILL PROVIDE A GOOD CHANCE OF THUNDERSTORMS. THE MAIN THREAT OF THESE THUNDERSTORMS WILL BE HEAVY RAIN AND LOCALIZED FLOODING. LIGHT WINDS IN THE UPPER ATMOSPHERE WILL ALSO MAKE THESE THUNDERSTORMS SLOW MOVERS. THE FRONT WILL MOVE VERY SLOWLY SOUTH THROUGH TOMORROW WITH LITTLE CHANGE IN THE WEATHER PATTERN. HEAVY RAIN HAS FALLEN OVER PARTS OF THE REGION OVER THE LAST COUPLE OF DAYS MAKING THE GROUND NEARLY SATUATED. ANY HEAVY RAINFALL OVER THESE AREAS WILL POSE A LOCAL FLOODING THREAT. PEOPLE ARE URGED TO MONITOR THIS WEATHER PATTERN CLOSELY BY LISTENING TO NOAA WEATHER RADIO...TELEVISION AND RADIO STATIONS THROUGHOUT THE DAY.
Nearby
Severe Thunderstorm Warnings in Mississippi, 1997Every severe thunderstorm warning in 1997
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.