Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 84, NWS Jackson, MS

May 13, 2011Choctaw County, Noxubee County, Winston County, Mississippi

NWS Jackson, MS issued this flash flood warning at May 13, 2011, 8:35 PM CDT for Choctaw County, Noxubee County, Winston County, Mississippi. It was in force for 115 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: May 13, 2011, 8:35 PM CDT (01:35 UTC)
Expired: May 13, 2011, 10:30 PM CDT
In force: 115 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Choctaw County, MS, Noxubee County, MS, Winston County, MS

The radar

The Columbus AFB radar (KGWX), 94 km from the middle of the area, began a volume at 01:36 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, 1.6 hours before the alert went out and 151 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: 2289 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

140 
WGUS54 KJAN 140135
FFWJAN
MSC019-103-159-140330-
/O.NEW.KJAN.FF.W.0084.110514T0135Z-110514T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
835 PM CDT FRI MAY 13 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN CHOCTAW COUNTY IN CENTRAL MISSISSIPPI...
  NOXUBEE COUNTY IN EAST CENTRAL MISSISSIPPI...
  WINSTON COUNTY IN EAST CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF LOUISVILLE...

* UNTIL 1030 PM CDT

* AT 835 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  BROOKSVILLE TO 12 MILES WEST OF CENTER RIDGE...OR ALONG A LINE
  EXTENDING FROM 16 MILES SOUTHEAST OF STARKVILLE TO 13 MILES WEST OF
  LOUISVILLE...MOVING EAST AT 15 MPH. ESTIMATED RADAR RAINFALL
  AMOUNTS...ON THE ORDER OF ONE TO THREE INCHES...HAVE OCCURRED IN
  THE PAST THREE HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MILLCREEK...DEERBROOK...BIGBEE VALLEY...MASHULAVILLE...VERNON...
  MACON...PRAIRIE POINT AND GHOLSON

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

RAINFALL AMOUNTS FROM ONE TO THREE INCHES A HOUR CAN CAUSE FLOODING
ON ROADS IN AND AROUND THE CITY OF MACON...INCLUDING FOOT ROAD...
PERKINS ROAD AND FIRTH LAKE ROAD...SOUTH OF THE CITY OF MACON...AND
FOX CHASE ROAD EAST OF THE CITY OF MACON.

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 3315 8831 3293 8873 3296 8917 3305 8932
      3320 8932 3321 8913 3329 8913 3329 8831
      3328 8830

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:04 PM CDT	Special Weather Statement	JAN	Jefferson Davis	31 min
May 13, 7:13 PM CDT	Special Weather Statement	JAN	Scott	47 min
May 13, 7:16 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Noxubee, Oktibbeha, Winston	44 min
May 13, 7:44 PM CDT	Flash Flood Warning	JAN	Choctaw, Clay, Oktibbeha, Webster	96 min
May 13, 7:53 PM CDT	Severe Thunderstorm Warning	JAN	Marion	67 min
May 13, 8:01 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Noxubee, Oktibbeha, Winston	44 min
May 13, 8:08 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Marion	52 min
May 13, 8:22 PM CDT	Tornado Warning	JAN	Noxubee, Winston	38 min
May 13, 8:30 PM CDT	Special Weather Statement	JAN	Lamar	45 min
May 13, 8:47 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	43 min
May 13, 8:53 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Neshoba, Noxubee, Winston	52 min
May 13, 8:58 PM CDT	Severe Thunderstorm Warning	JAN	Lamar	25 min
May 13, 9:47 PM CDT	Special Weather Statement	JAN	Kemper, Lauderdale, Newton	58 min
May 13, 10:42 PM CDT	Special Weather Statement	JAN	Clarke, Covington, Jasper, Jones, Lauderdale	58 min
May 13, 10:54 PM CDT	Special Weather Statement	JAN	Marion	46 min
May 13, 11:17 PM CDT	Severe Thunderstorm Warning	JAN	Clarke, Lauderdale	28 min
May 13, 11:25 PM CDT	Special Weather Statement	JAN	Jones	30 min
May 13, 11:42 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jones, Lamar	35 min
May 14, 12:11 AM CDT	Flash Flood Warning	JAN	Forrest, Jones, Lamar	94 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.