Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Jackson, MS

December 31, 20104 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Dec 31, 2010, 9:37 PM CST for 4 counties in Mississippi. It was in force for 3 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 31, 2010, 9:37 PM CST (03:37 UTC)
Expired: Jan 1, 2011, 12:30 AM CST
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, MS, Grenada County, MS, Humphreys County, MS, Montgomery County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 139 km from the middle of the area, began a volume at 03:36 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.

What was reported inside it

Time	Report	Where	Remark
Dec 31, 10:30 PM CST	FLASH FLOOD	Seven Pines, MS	SEVERAL RDS FLOODED.
Dec 31, 10:55 PM CST	FLASH FLOOD	Winona, MS	SEVERAL STREETS ARE FLOODED IN THE CITY OF WINONA...AND MANY CARS HAVE BEEN FLOODED.
Dec 31, 11:40 PM CST	FLASH FLOOD	Winona, MS	SEVERAL RDS WERE CLOSED WITH SOME WASHED OUT NEAR AND AROUND WINONA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 3.6 hours before the alert went out and 146 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1802 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

753 
WGUS54 KJAN 010337
FFWJAN
MSC015-043-053-097-010630-
/O.NEW.KJAN.FF.W.0002.110101T0337Z-110101T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
937 PM CST FRI DEC 31 2010

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN HUMPHREYS COUNTY IN CENTRAL MISSISSIPPI...
  CARROLL COUNTY IN NORTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BLACK HAWK...
  GRENADA COUNTY IN NORTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF GRENADA...
  MONTGOMERY COUNTY IN NORTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF WINONA...

* UNTIL 1230 AM CST

* AT 937 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN 17 MILES SOUTHWEST OF SEVEN
  PINES...OR 7 MILES NORTH OF THORNTON...MOVING NORTHEAST AT 45 MPH.
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO THREE
  INCHES...HAVE OCCURRED IN THE PAST TWO HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  COILA...MALMAISON...TEOC...AVALON...NORTH CARROLLTON...VAIDEN...
  LEFLORE...JEFFERSON...HOLCOMB...POPLAR CREEK...BEW SPRINGS...
  KILMICHAEL...DUCK HILL...ELLIOTT...LODI...SWEATMAN...MISTERTON AND
  GORE SPRINGS

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
THREE 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 GRENADA...INCLUDING MONROE STREET
AT FAIRGROUND ROAD...VAN DORN BETWEEN COMMERCE AND POPLAR STREETS...
MOUND STREET AT JEFFERSON STREET...PEARL AT LYNCH STREET AND COUNTRY
CLUB ROAD JUST SOUTH OF EAST MONROE STREET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF URBAN
AREAS...INCLUDING HIGHWAYS...STREETS AND UNDERPASSES...IN ADDITION TO
LOW LYING AND OTHER POOR DRAINAGE AREAS.

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 3387 8951 3347 8951 3346 8938 3344 8945
      3330 8945 3329 8969 3323 8976 3334 9019
      3334 9018 3342 9017 3342 9013 3347 9013
      3347 9009 3380 9013 3383 8993 3390 8992

$$

BK

1 follow-up statement

603 
WGUS74 KJAN 010510
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1110 PM CST FRI DEC 31 2010

MSC015-043-053-097-010630-
/O.CON.KJAN.FF.W.0002.000000T0000Z-110101T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GRENADA MS-CARROLL MS-MONTGOMERY MS-HUMPHREYS MS-
1110 PM CST FRI DEC 31 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CST FOR
HUMPHREYS...MONTGOMERY...CARROLL AND GRENADA COUNTIES...

AT 1107 PM CST...LOCAL EMERGENCY MANAGEMENT OFFICIALS REPORTED 
THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER WINONA...MOVING 
NORTHEAST AT 50 MPH. FLOODING HAS BEEN REPORTED THROUGHOUT THE CITY 
OF WINONA...AND SEVERAL CARS HAVE BEEN FLOODED. SHOWERS AND 
THUNDERSTORMS CONTINUE TO TRACK ACROSS THE ENTIRE WARNED AREA. 
ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO TO THREE 
INCHES...HAVE OCCURRED IN THE PAST HOUR.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO POPLAR
CREEK...LODI...SWEATMAN...MISTERTON...GORE SPRINGS...ELLIOTT...BEW
SPRINGS...HOLCOMB...LEFLORE...COILA...BLACK HAWK...SEVEN PINES...
MALMAISON...JEFFERSON...TEOC...AVALON...WINONA...VAIDEN...NORTH
CARROLLTON...KILMICHAEL...ISOLA...GRENADA AND DUCK HILL

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF HIGHWAYS
AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE
BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO
FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
FIND AN ALTERNATE ROUTE AND MOVE TO HIGHER GROUND.

&&

LAT...LON 3387 8951 3347 8951 3346 8938 3344 8945
      3330 8945 3329 8969 3323 8976 3334 9019
      3334 9018 3342 9017 3342 9013 3347 9013
      3347 9009 3380 9013 3383 8993 3390 8992

$$

BK

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 31, 6:00 PM CST	Severe Thunderstorm Warning	JAN	Leake, Rankin, Scott	60 min
Dec 31, 6:09 PM CST	Tornado Warning	JAN	Rankin, Scott, Smith	66 min
Dec 31, 7:02 PM CST	Severe Thunderstorm Warning	JAN	Neshoba, Newton	58 min
Dec 31, 7:19 PM CST	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	56 min
Dec 31, 7:20 PM CST	Severe Thunderstorm Warning	JAN	Franklin, Lincoln	55 min
Dec 31, 7:26 PM CST	Tornado Warning	JAN	Franklin, Lincoln	64 min
Dec 31, 7:54 PM CST	Severe Thunderstorm Warning	JAN	Kemper, Neshoba	49 min
Dec 31, 8:00 PM CST	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Washington	60 min
Dec 31, 8:03 PM CST	Tornado Warning	JAN	Copiah	40 min
Dec 31, 8:11 PM CST	Severe Thunderstorm Warning	JAN	Issaquena	33 min
Dec 31, 8:25 PM CST	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Leflore	50 min
Dec 31, 9:02 PM CST	Flash Flood Warning	JAN	Holmes, Humphreys, Issaquena, Sharkey, Washington, Yazoo	3 hr
Dec 31, 9:26 PM CST	Flash Flood Watch	JAN	Attala, Carroll, Choctaw, Clay, Grenada, Holmes and 9 more	7 hr
Dec 31, 9:36 PM CST	Severe Thunderstorm Warning	JAN	Holmes	69 min
Dec 31, 9:50 PM CST	Severe Thunderstorm Warning	JAN	Yazoo	40 min
Dec 31, 10:01 PM CST	Severe Thunderstorm Warning	JAN	Attala, Carroll, Montgomery	59 min
Dec 31, 10:11 PM CST	Tornado Warning	JAN	Holmes	42 min
Dec 31, 10:15 PM CST	Severe Thunderstorm Warning	JAN	Webster	60 min
Dec 31, 10:18 PM CST	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Warren, Yazoo	42 min
Dec 31, 10:21 PM CST	Tornado Warning	JAN	Carroll, Choctaw, Montgomery, Webster	54 min
Dec 31, 10:28 PM CST	Flash Flood Warning	JAN	Webster	3 hr
Dec 31, 10:59 PM CST	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Issaquena, Warren, Yazoo	61 min
Dec 31, 11:07 PM CST	Tornado Warning	JAN	Holmes, Humphreys, Yazoo	53 min
Dec 31, 11:22 PM CST	Severe Thunderstorm Warning	JAN	Claiborne, Hinds, Warren	68 min
Dec 31, 11:29 PM CST	Flash Flood Warning	JAN	Hinds, Madison, Rankin, Warren, Yazoo	4 hr
Dec 31, 11:35 PM CST	Tornado Warning	JAN	Copiah, Lawrence, Lincoln, Simpson	55 min
Dec 31, 11:39 PM CST	Tornado Warning	JAN	Attala, Holmes	66 min
Dec 31, 11:56 PM CST	Severe Thunderstorm Warning	JAN	Madison, Yazoo	64 min
Dec 31, 11:58 PM CST	Flash Flood Warning	JAN	Attala, Choctaw, Holmes	3 hr
Jan 1, 12:11 AM CST	Tornado Warning	JAN	Rankin, Scott, Smith	64 min
Jan 1, 12:16 AM CST	Tornado Warning	JAN	Leake, Madison	59 min
Jan 1, 12:21 AM CST	Tornado Warning	JAN	Choctaw, Clay, Montgomery, Oktibbeha, Winston	54 min
Jan 1, 12:46 AM CST	Tornado Warning	JAN	Attala, Choctaw, Leake, Neshoba, Winston	59 min
Jan 1, 1:05 AM CST	Tornado Warning	JAN	Clay, Lowndes, Oktibbeha	55 min
Jan 1, 1:11 AM CST	Tornado Warning	JAN	Kemper, Neshoba, Newton, Scott	64 min
Jan 1, 1:38 AM CST	Severe Thunderstorm Warning	JAN	Scott, Smith	67 min
Jan 1, 1:46 AM CST	Flash Flood Warning	JAN	Copiah, Simpson, Smith	5 hr
Jan 1, 1:47 AM CST	Tornado Warning	JAN	Kemper, Neshoba, Noxubee, Winston	58 min
Jan 1, 1:50 AM CST	Tornado Warning	JAN	Lowndes	25 min
Jan 1, 1:54 AM CST	Flash Flood Warning	JAN	Leake, Neshoba, Newton, Scott	3 hr
Jan 1, 2:05 AM CST	Flash Flood Warning	JAN	Lowndes, Noxubee, Oktibbeha, Winston	2 hr
Jan 1, 2:40 AM CST	Tornado Warning	JAN	Noxubee	17 min
Jan 1, 2:45 AM CST	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	60 min
Jan 1, 2:51 AM CST	Flash Flood Warning	JAN	Kemper, Lauderdale	3 hr
Jan 1, 2:56 AM CST	Tornado Warning	JAN	Kemper	64 min
Jan 1, 3:24 AM CST	Tornado Warning	JAN	Noxubee	34 min
Jan 1, 3:41 AM CST	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale	79 min
Jan 1, 4:21 AM CST	Severe Thunderstorm Warning	JAN	Covington, Jasper, Jefferson Davis, Jones, Smith	50 min
Jan 1, 4:34 AM CST	Tornado Warning	JAN	Covington, Jasper, Jones, Smith	34 min
Jan 1, 4:47 AM CST	Flash Flood Warning	JAN	Clarke, Jasper, Jones	3 hr
Jan 1, 9:41 AM CST	River Flood Warning	JAN	Clay	23 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.