Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 110, NWS Jackson, MS

July 24, 2011Kemper County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 24, 2011, 10:38 AM CDT for Kemper County, Mississippi. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 24, 2011, 10:38 AM CDT (15:38 UTC)
Expired: Jul 24, 2011, 12:30 PM CDT
In force: 112 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Kemper County, MS

The radar

The Columbus AFB radar (KGWX), 131 km from the middle of the area, began a volume at 15:39 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 12:00Z, 3.6 hours before the alert went out and 141 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1845 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

223 
WGUS54 KJAN 241538
FFWJAN
MSC069-241730-
/O.NEW.KJAN.FF.W.0110.110724T1538Z-110724T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1038 AM CDT SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KEMPER COUNTY IN EAST CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF PRESTON...

* UNTIL 1230 PM CDT

* AT 1037 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  AN AREA OF HEAVY RAIN WITH EMBEDDED THUNDERSTORMS NEAR             
  LIBERTY...OR 11 MILES NORTHWEST OF MERIDIAN STATION...MOVING EAST  
  AT 10 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE  
  TO THREE INCHES...HAVE OCCURRED IN THE PAST HOUR.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PRISMATIC...BLUFF SPRINGS...BLACKWATER...DE KALB...OAK GROVE AND
  ELECTRIC MILLS

VERY HEAVY RAINFALL WILL CONTINUE TO DEVELOP OVER THE WARNED AREA 
FOR THE NEXT TWO HOURS WITH AN ADDITIONAL ONE TO THREE INCHES 
POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE WATER COVERS THE ROADWAY. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3276 8846 3258 8864 3258 8890 3284 8892
      3288 8891 3290 8839

$$

JC

1 follow-up statement

918 
WGUS74 KJAN 241726
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1226 PM CDT SUN JUL 24 2011

MSC069-241736-
/O.EXP.KJAN.FF.W.0110.000000T0000Z-110724T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KEMPER MS-
1226 PM CDT SUN JUL 24 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1230 PM CDT FOR KEMPER
COUNTY...

THE HEAVIEST RAINFALL HAS SUBSIDED. LIGHT TO MODERATE RAINFALL WILL 
CONTINUE FOR ANOTHER THIRTY MINUTES TO AN HOUR. 


LAT...LON 3276 8846 3258 8864 3258 8890 3284 8892
      3288 8891 3290 8839

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 9:05 AM CDT	Flash Flood Warning	JAN	Clarke, Jasper, Lauderdale, Newton	115 min
Jul 24, 10:57 AM CDT	Flash Flood Warning	JAN	Lauderdale	108 min
Jul 24, 11:47 AM CDT	Special Weather Statement	JAN	Forrest	43 min
Jul 24, 12:00 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	2 hr
Jul 24, 1:21 PM CDT	Special Weather Statement	JAN	Jones	39 min
Jul 24, 1:45 PM CDT	Special Weather Statement	JAN	Lamar	40 min
Jul 24, 2:01 PM CDT	Special Weather Statement	JAN	Clay	29 min
Jul 24, 2:37 PM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis, Lamar, Marion	113 min
Jul 24, 2:42 PM CDT	Special Weather Statement	JAN	Humphreys	43 min
Jul 24, 3:54 PM CDT	Special Weather Statement	JAN	Lawrence	26 min
Jul 24, 5:01 PM CDT	Special Weather Statement	JAN	Madison	44 min
Jul 24, 5:16 PM CDT	Special Weather Statement	JAN	Choctaw	44 min
Jul 24, 5:37 PM CDT	Flash Flood Warning	JAN	Choctaw, Winston	66 min
Jul 24, 6:20 PM CDT	Special Weather Statement	JAN	Montgomery	40 min
Jul 24, 6:58 PM CDT	Flash Flood Warning	JAN	Montgomery	82 min

Nearby

Flash Flood Warnings in Mississippi, 2011 Every flash flood warning in 2011

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.