Alert archive / Mississippi / Flash Flood Warnings in 1991
Flash Flood Warning 2, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Feb 18, 1991, 3:30 PM CST for Carroll County, Holmes County, Leflore County, Mississippi. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Feb 18, 1991, 3:30 PM CST (21:30 UTC)
- Expired
- Feb 18, 1991, 7:30 PM CST
- In force
- 4 hr
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
Counties Carroll County, MS, Holmes County, MS, Leflore County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 117 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
- 15 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 182134 FFWJAN MSC015-051-163-083-053-125-190130- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE JACKSON MS 330 PM CST MON FEB 18 1991 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 730 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MISSISSIPPI ...CARROLL COUNTY...HOLMES COUNTY...YAZOO COUNTY IN NORTH CENTRAL MISSISSIPPI ...LEFLORE COUNTY IN WEST CENTRAL MISSISSIPPI ...HUMPHREYS COUNTY...SHARKEY COUNTY AT 330 PM VERY HEAVY RAINS WERE INCREASING ACROSS ALL SIX OF THESE COUNTIES WITH RATES OF AT LEAST 1 INCH PER HOUR EXPECTED DURING THE NEXT FEW HOURS. THUNDERSTORMS WERE BUILDING OVER YAZOO AND SHARKEY COUNTIES AND TRACKING NORTHEAST AT 40 MILES AN HOUR AS MORE STORMS REDEVELOP JUST TO THE SOUTHWEST. THIS COULD BECOME A VERY SERIOUS FLOODING EVENT AS THESE RAINS INTENSIFY AND PERSONS IN THESE AREAS SHOULD TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. DO NOT STAY IN AREAS SUBJECT TO FLASH FLOODING WHEN WATER BEGINS RISING. MOVE TO HIGHER GROUND. <
What forecasters said that day
The local office's own words before this flash flood 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, Feb 18, 1:53 PM CST, 1 hour 37 minutes before
MSZALL-190600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 150 PM CST MON FEB 18 1991 ...SEVERE THUNDERSTORM THREAT CONTINUES TO RISE OVER CENTRAL MISSISSIPPI... LATEST ANALYSES AND RADAR INFORMATION INDICATES THAT THE THREAT OF SEVERE THUNDERSTORMS CONTINUES TO INCREASE FOR CENTRAL MISSISSIPPI AT THIS HOUR. RAPIDLY DEVELOPING THUNDERSTORMS WERE DETECTED BETWEEN VICKSBURG...YAZOO CITY AND JACKSON DURING THE PAST 30 MINUTES AND SOME WARNINGS MAY BE NEEDED IN THE NEXT FEW HOURS. THESE STORMS WILL BE MOVING NORTHEAST AT 40 TO 50 MILES AN HOUR AND SOME MAY CONTAIN TORNADOES...LARGE HAIL...DAMAGING WINDS...TORRENTIAL RAINS AND DEADLY LIGHTNING. RESIDENTS OF ESPECIALLY WEST CENTRAL COUNTIES SHOULD REMAIN ALERT FOR THE REST OF THE AFTERNOON THROUGH TONIGHT AS THIS VERY STRONG SYSTEM DEVELOPS. MOVE TO A PLACE OF SAFETY IF SEVERE WEATHER IS SIGHTED OR WARNINGS ARE ISSUED...SECONDS CAN SAVE LIVES.
Special weather statement, Feb 18, 2:38 PM CST, 52 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013- ALZ004-008-013-016-182130- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 230 PM CST MON FEB 18 1991 AT 225PM A LARGE AREA OF RAIN WITH EMBEDDED THUNDERSTORMS COVERED MOST OF MISSISSIPPI WEST OF A MERIDIAN TO BROOKHAVEN TO NATCHEZ LINE AND EXTENDED INTO LOUISIANA AND ARKANSAS. THE STRONGEST THUNDER- STORM IN THIS AREA WITH VERY HEAVY RAINFALL WAS ABOUT 10 MILES SOUTH OF PORT GIBSON MOVING NORTHEAST AT 40 MILES AN HOUR. THE RAINFALL INTENSITIES HAVE BEEN STEADILY INCREASING OVER WEST AND NORTH MISSISSIPPI SO LOCAL URBAN AND STREET FLOODING IS LIKELY WITH THE HEAVIER BURSTS OF RAIN FOR THE NEXT SEVERAL HOURS. IN FACT SOME FLASH FLOOD WARNINGS MAY BE NEEDED FOR A FEW LOWER DELTA COUNTIES SHORTLY. ALONG WITH THE HEAVY RAIN...GUSTY WINDS AND LIGHTNING WILL LIKELY DEVELOP WITH THESE THUNDERSTORMS. BY LATER THIS AFTERNOON AND EVENING THERE WILL BE A THRNEAT FOR SEVERE THUNDERSTORMS SO RESIDENTS SHOULD KEEP ADVISED OF THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 3:48 AM CST | Severe Thunderstorm Warning | JAN | Sharkey | 27 min |
| Feb 18, 4:14 AM CST | Severe Thunderstorm Warning | JAN | Holmes | 31 min |
| Feb 18, 6:10 AM CST | Severe Thunderstorm Warning | JAN | Winston | 35 min |
| Feb 18, 3:30 PM CST | Flash Flood Warning | JAN | Humphreys, Sharkey, Yazoo | 4 hr |
Nearby
Flash Flood Warnings in Mississippi, 1991Every flash flood warning in 1991
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.