Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 155, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 14, 1998, 3:27 PM CDT for Kemper County, Mississippi. It was in force for 33 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
- Apr 14, 1998, 3:27 PM CDT (20:27 UTC)
- Expired
- Apr 14, 1998, 4:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Kemper County, MS
The radar
The Columbus AFB radar (KGWX), 130 km from the middle of the area, began a volume at 20:30 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 14, 3:30 PM CDT | Thunderstorm Wind | Porterville, MS | The roof of a porch was blown off and one tree was 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 nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 8.5 hours before the alert went out and 143 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
- 450 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 142027 RRA SVRJAN MSC069-142100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 327 PM CDT TUE APR 14 1998 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL MISSISSIPPI ...EASTERN KEMPER COUNTY AT 325 PM DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM JUST SOUTH OF PORTERVILLE MOVING EAST AT 15 MPH. THIS STORM WILL AFFECT HIGHWAY 45 THROUGH 345 PM. IF YOU ARE OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AWAY FROM WINDOWS. DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDER2STORMS. < 75
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, Apr 14, 10:15 AM CDT, 5 hours 12 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-072> 074-150400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1015 AM CDT TUE APR 14 1998 SOUTHERLY FLOW WAS TRANSPORTING WARM...MOIST AIR ACROSS THE AREA THIS MORNING WITH SURFACE DEWPOINTS IN THE MID 60S. ALSO...CLOUD COVER WAS WIDESPREAD ACROSS THE AREA. SURFACE HEATING THIS AFTERNOON WILL HELP BREAK UP THE CLOUDS AND MAKE THE AIRMASS MORE UNSTABLE. AS A RESULT...SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EVENING. A FEW STORMS MAY BE SEVERE TO THE NORTH OF A ACKERMAN TO KOSCIUSKO TO YAZOO CITY TO DELHI LOUISIANA LINE. A DEVELOPING LOW PRESSURE SURFACE TROUGH IN THIS AREA WILL INCREASE THE CHANCE FOR SEVERE WEATHER. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND PUBLIC SAFETY OFFICIALS MAY BE REQUIRED TODAY AND TONIGHT FOR SEVERE WEATHER OPERATIONS. FOR MORE INFORMATION...PLEASE VISIT OUR WEB SITE AT: HTTP//WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
Special weather statement, Apr 14, 10:15 AM CDT, 5 hours 12 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-072> 074-150400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1015 AM CDT TUE APR 14 1998 SOUTHERLY FLOW WAS TRANSPORTING WARM...MOIST AIR ACROSS THE AREA THIS MORNING WITH SURFACE DEWPOINTS IN THE MID 60S. ALSO...CLOUD COVER WAS WIDESPREAD ACROSS THE AREA. SURFACE HEATING THIS AFTERNOON WILL HELP BREAK UP THE CLOUDS AND MAKE THE AIRMASS MORE UNSTABLE. AS A RESULT...SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EVENING. A FEW STORMS MAY BE SEVERE TO THE NORTH OF A ACKERMAN TO KOSCIUSKO TO YAZOO CITY TO DELHI LOUISIANA LINE. A DEVELOPING LOW PRESSURE SURFACE TROUGH IN THIS AREA WILL INCREASE THE CHANCE FOR SEVERE WEATHER. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND PUBLIC SAFETY OFFICIALS MAY BE REQUIRED TODAY AND TONIGHT FOR SEVERE WEATHER OPERATIONS. FOR MORE INFORMATION...PLEASE VISIT OUR WEB SITE AT: HTTP//WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
Nearby
Severe Thunderstorm Warnings in Mississippi, 1998Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.