Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 501, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 29, 1999, 2:39 PM CDT for Copiah County, Mississippi. It was in force for 31 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
- May 29, 1999, 2:39 PM CDT (19:39 UTC)
- Expired
- May 29, 1999, 3:10 PM CDT
- In force
- 31 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Copiah County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 7.7 hours before the alert went out and 61 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
- 346 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, May 29, 10:00 AM CDT, 4 hours 39 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 290400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1000 AM CDT SAT MAY 29 1999 WITH A STATIONARY BOUNDARY ALONG THE GULF COAST AND ISENTROPIC UPGLIDE BRINGING IN GULF MOISTURE...SHOWERS AND THUNDERSTORMS ARE LIKELY ACROSS THE AREA. HOWEVER...WITH LIMITED INSTABILITY AND SHEAR...ORGANIZED SEVERE THUNDERSTORM ACTIVITY IS NOT EXPECTEDXNTO TONIGHT. ANY STORMS WHICH DO BECOME SEVERE WILL BE OF THE PULSE TYPE WITH LOCALIZED HAIL AND DAMAGING WINDS. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL WILL NOT BE NEEDED THROUGH TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT: HTTP://WWW.JANNWS.STATE.MS.US
Special weather statement, May 29, 10:00 AM CDT, 4 hours 39 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 290400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1000 AM CDT SAT MAY 29 1999 WITH A STATIONARY BOUNDARY ALONG THE GULF COAST AND ISENTROPIC UPGLIDE BRINGING IN GULF MOISTURE...SHOWERS AND THUNDERSTORMS ARE LIKELY ACROSS THE AREA. HOWEVER...WITH LIMITED INSTABILITY AND SHEAR...ORGANIZED SEVERE THUNDERSTORM ACTIVITY IS NOT EXPECTEDXNTO TONIGHT. ANY STORMS WHICH DO BECOME SEVERE WILL BE OF THE PULSE TYPE WITH LOCALIZED HAIL AND DAMAGING WINDS. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL WILL NOT BE NEEDED THROUGH TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT: HTTP://WWW.JANNWS.STATE.MS.US
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:05 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 35 min |
| May 28, 7:41 PM CDT | Severe Thunderstorm Warning | JAN | Jasper, Jones | 49 min |
| May 28, 8:08 PM CDT | Severe Thunderstorm Warning | JAN | Covington | 47 min |
| May 28, 8:13 PM CDT | Severe Thunderstorm Warning | JAN | Clarke | 62 min |
| May 28, 8:20 PM CDT | Severe Thunderstorm Warning | JAN | Smith | 50 min |
| May 28, 9:53 PM CDT | Severe Thunderstorm Warning | JAN | Jefferson Davis, Lamar | 47 min |
| May 29, 1:52 PM CDT | Flash Flood Warning | JAN | Washington | 2 hr |
| May 29, 4:26 PM CDT | Severe Thunderstorm Warning | JAN | Yazoo | 49 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.