Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 49, NWS Jackson, MS

May 8, 2012Washington County, Mississippi; Chicot County, Arkansas

NWS Jackson, MS issued this flash flood warning at May 8, 2012, 3:22 PM CDT for Washington County, Mississippi; Chicot County, Arkansas. It was in force for 91 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 8, 2012, 3:22 PM CDT (20:22 UTC)
Expired: May 8, 2012, 4:53 PM CDT
In force: 91 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Chicot County, AR, Washington County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 160 km from the middle of the area, began a volume at 20:23 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, 8.4 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: 231 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -55 m²/s²
0-3 km storm-relative helicity: -37 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.

966 
WGUS54 KJAN 082022
FFWJAN
ARC017-MSC151-082215-
/O.NEW.KJAN.FF.W.0049.120508T2022Z-120508T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
322 PM CDT TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN WASHINGTON COUNTY IN NORTHWEST MISSISSIPPI...
  THIS INCLUDES THE CITY OF GREENVILLE...
  NORTHEASTERN CHICOT COUNTY IN SOUTHEAST ARKANSAS...

* UNTIL 515 PM CDT

* AT 322 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN NEAR WINTERVILLE...OR 7
  MILES NORTH OF GREENVILLE. THE STORMS WERE NEARLY STATIONARY.
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO TO THREE    
  INCHES...HAVE OCCURRED IN THE PAST HOUR.

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

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.

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 3335 9093 3336 9117 3353 9116 3353 9093

$$

BK

2 follow-up statements

993 
WGUS74 KJAN 082053
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
353 PM CDT TUE MAY 8 2012

ARC017-082102-
/O.CAN.KJAN.FF.W.0049.000000T0000Z-120508T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHICOT AR-
353 PM CDT TUE MAY 8 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN CHICOT
COUNTY...

LAT...LON 3346 9093 3346 9111 3353 9111 3353 9093

$$

MSC151-082215-
/O.CON.KJAN.FF.W.0049.000000T0000Z-120508T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MS-
353 PM CDT TUE MAY 8 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTH
CENTRAL WASHINGTON COUNTY...

AT 352 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN NEAR WINTERVILLE...OR
9 MILES NORTH OF GREENVILLE. THE STORMS WERE NEARLY STATIONARY.
ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO TO FOUR
INCHES...HAVE OCCURRED IN THE PAST HOUR.

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT 
HOUR AND A HALF...WITH AN ADDITIONAL ONE INCH POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3346 9093 3346 9111 3353 9111 3353 9093

$$

BK

325 
WGUS74 KJAN 082153
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
453 PM CDT TUE MAY 8 2012

MSC151-082203-
/O.CAN.KJAN.FF.W.0049.000000T0000Z-120508T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MS-
453 PM CDT TUE MAY 8 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL
WASHINGTON COUNTY...

LAT...LON 3346 9093 3346 9111 3353 9111 3353 9093

$$

BK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 11:54 PM CDT	Special Weather Statement	JAN	Washington	31 min
May 8, 6:07 AM CDT	Dense Fog Advisory	JAN	Choctaw, Clay, Lowndes, Noxubee, Oktibbeha, Webster and 1 more	3 hr
May 8, 2:18 PM CDT	Special Weather Statement	JAN	Attala	32 min
May 8, 2:34 PM CDT	Special Weather Statement	JAN	Attala	16 min
May 8, 2:43 PM CDT	Flash Flood Warning	JAN	Attala	2 hr
May 8, 2:50 PM CDT	Special Weather Statement	JAN	Leflore	30 min
May 8, 2:56 PM CDT	Special Weather Statement	JAN	Choctaw	29 min
May 8, 3:04 PM CDT	Severe Thunderstorm Warning	JAN	Attala	41 min
May 8, 3:08 PM CDT	Special Weather Statement	JAN	Webster	32 min
May 8, 3:18 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore	42 min
May 8, 3:41 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Montgomery	49 min
May 8, 4:13 PM CDT	Special Weather Statement	JAN	Leflore	32 min
May 8, 5:04 PM CDT	Special Weather Statement	JAN	Franklin	31 min
May 8, 5:30 PM CDT	Severe Thunderstorm Warning	JAN	Kemper	26 min
May 8, 5:55 PM CDT	Special Weather Statement	JAN	Claiborne	30 min
May 8, 6:38 PM CDT	Special Weather Statement	JAN	Madison	32 min
May 7, 11:55 PM CDT	Special Weather Statement	JAN	Chicot	30 min

Nearby

Flash Flood Warnings in Mississippi, 2012 Flash Flood Warnings in Arkansas, 2012 Every flash flood warning in 2012

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.