Alert archive / Mississippi / Flash Flood Warnings in 2009

Flash Flood Warning 132, NWS Jackson, MS

September 21, 2009Kemper County, Noxubee County, Mississippi

NWS Jackson, MS issued this flash flood warning at Sep 21, 2009, 3:43 AM CDT for Kemper County, Noxubee County, Mississippi. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 21, 2009, 3:43 AM CDT (08:43 UTC)
Expired
Sep 21, 2009, 7:30 AM CDT
In force
4 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Kemper County, MS, Noxubee County, MS

The radar

The Columbus AFB radar (KGWX), 110 km from the middle of the area, began a volume at 08:45 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 8.7 hours before the alert went out and 154 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2009-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2130 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2009-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2130 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.2

Open this sounding in Storm Lab

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.

NWS Jackson, MS wrote its last area forecast discussion before this flash flood warning went out at Sep 20, 9:30 PM CDT, 6 hours 13 minutes earlier.

Area forecast discussion, Sep 20, 9:30 PM CDT, 6 hours 13 minutes before
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Hazardous weather outlook, Sep 20, 2:22 PM CDT, 13 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
222 PM CDT SUN SEP 20 2009

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
211930-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-
CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-
NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER-
WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH-
SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
222 PM CDT SUN SEP 20 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TONIGHT AND MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SATURDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS IS NOT EXPECTED THROUGH NEXT SATURDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

22

In the hours before

Special weather statement, Sep 21, 2:44 AM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
244 AM CDT MON SEP 21 2009

MSZ032-033-038-210815-
OKTIBBEHA MS-CHOCTAW MS-WINSTON MS-
244 AM CDT MON SEP 21 2009

A STRONG THUNDERSTORM CAPABLE OF PRODUCING VERY HEAVY RAIN WAS
LOCATED 9 MILES SOUTH OF ACKERMAN AT 243 AM CDT...MOVING NORTHEAST AT
15 MPH. AREAS AFFECTED COULD RECEIVE A QUICK INCH OF
RAINFALL...WHICH COULD LEAD TO MINOR TO MODERATE PONDING OF WATER
ISSUES.

DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN NORTH CENTRAL WINSTON...SOUTHEASTERN CHOCTAW AND
SOUTHWESTERN OKTIBBEHA COUNTIES SHOULD MONITOR THIS STORM CLOSELY.

BYB
Special weather statement, Sep 21, 3:29 AM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
329 AM CDT MON SEP 21 2009

MSZ039-046-210855-
KEMPER MS-NOXUBEE MS-
329 AM CDT MON SEP 21 2009

A LINE OF THUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY RAIN WAS
LOCATED FROM PAULETTE TO BLACKWATER AT 327 AM CDT...MOVING NORTHEAST
AT 15 MPH.

VERY HEAVY RAIN...BETWEEN 1 AND 2 INCHES PER HOUR...ALONG WITH
CONTINUOUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE WITH THESE STORMS.
THIS HEAVY RAIN IS MOVING OVER AREAS THAT HAVE ALREADY SEEN HEAVY
RAIN EITHER DURING THIS PAST EVENING OR OVER THE LAST DAY OR TWO. A
FLASH FLOOD WARNING MAY BE NEEDED IF THESE STORMS CONTINUE TO MOVE
OVER THE SAME LOCATIONS THROUGH 4 AM.

PEOPLE IN SOUTHEASTERN NOXUBEE AND EASTERN KEMPER COUNTIES SHOULD
MONITOR THESE STORMS CLOSELY.

CME

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 20, 7:12 PM CDTFlash Flood WarningJANNoxubee2 hr
Sep 21, 4:02 AM CDTFlash Flood WatchJANAttala, Choctaw, Clay, Kemper, Lauderdale, Leake and 9 more15 hr
Sep 21, 6:35 AM CDTFlash Flood WarningJANNeshoba, Noxubee, Winston115 min
Sep 21, 8:31 AM CDTFlash Flood WarningJANChoctaw, Noxubee, Winston119 min
Sep 21, 9:40 AM CDTRiver Flood WarningJANNeshoba8 days
Sep 21, 10:16 AM CDTSevere Thunderstorm WarningJANChoctaw, Oktibbeha, Webster44 min
Sep 21, 10:39 AM CDTSevere Thunderstorm WarningJANClay, Oktibbeha, Webster31 min
Sep 21, 11:50 AM CDTFlash Flood WarningJANAttala, Choctaw2 hr
Sep 21, 1:17 PM CDTTornado WarningJANKemper43 min
Sep 21, 1:55 PM CDTTornado WarningJANKemper33 min
Sep 21, 4:02 PM CDTTornado WarningJANAttala, Choctaw, Winston38 min
Sep 21, 4:19 PM CDTSevere Thunderstorm WarningJANLauderdale30 min
Sep 21, 5:04 PM CDTSevere Thunderstorm WarningJANCatahoula, Concordia30 min

Nearby

Flash Flood Warnings in Mississippi, 2009Every flash flood warning in 2009

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; radar from the NEXRAD Level II archive.