Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 43, NWS Jackson, MS

April 17, 2012Copiah County, Lincoln County, Mississippi

NWS Jackson, MS issued this flash flood warning at Apr 17, 2012, 10:32 AM CDT for Copiah County, Lincoln County, Mississippi. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 17, 2012, 10:32 AM CDT (15:32 UTC)
Expired: Apr 17, 2012, 1:24 PM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Copiah County, MS, Lincoln County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 72 km from the middle of the area, began a volume at 15:36 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 12:00Z, 3.5 hours before the alert went out and 71 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: 157 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 444 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

002 
WGUS54 KJAN 171532
FFWJAN
MSC029-085-171930-
/O.NEW.KJAN.FF.W.0043.120417T1532Z-120417T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1032 AM CDT TUE APR 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COPIAH COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...HAZLEHURST...CRYSTAL SPRINGS...
  LINCOLN COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BROOKHAVEN...

* UNTIL 230 PM CDT

* AT 1031 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN MOVING REPEATEDLY NORTH  
  ACROSS THE WARNING AREA. ESTIMATED RADAR RAINFALL AMOUNTS...ON     
  THE ORDER OF TWO TO FOUR INCHES...HAVE OCCURRED IN THE PAST FEW   
  HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GALLMAN...MARTINSVILLE...GLANCY...ALLEN...BARLOW...DENTVILLE AND
  CARPENTER

HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT FEW 
HOURS WITH AN ADDITIONAL TWO 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 3135 9063 3161 9063 3205 9071 3205 9023
      3203 9025 3202 9022 3187 9022 3172 9023
      3169 9025 3134 9025

$$

EEC

1 follow-up statement

278 
WGUS74 KJAN 171824
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
124 PM CDT TUE APR 17 2012

MSC029-085-171833-
/O.CAN.KJAN.FF.W.0043.000000T0000Z-120417T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN MS-COPIAH MS-
124 PM CDT TUE APR 17 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR COPIAH AND LINCOLN
COUNTIES...

HEAVY RAIN HAS MOVED EAST OF THE PREVIOUSLY WARNED AREA. ADDITIONAL 
RAINFALL IS POSSIBLE THROUGH THE REMAINDER OF THE AFTERNOON...BUT AN 
ADDITIONAL FLASH FLOODING RISK IS NOT ANTICIPATED.

&&

LAT...LON 3135 9063 3161 9063 3205 9071 3205 9023
      3203 9025 3202 9022 3187 9022 3172 9023
      3169 9025 3134 9025

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 9:54 AM CDT	Flash Flood Warning	JAN	Holmes, Yazoo	4 hr
Apr 17, 10:17 AM CDT	Flash Flood Warning	JAN	Claiborne, Hinds, Madison, Warren	4 hr
Apr 17, 12:00 PM CDT	Flash Flood Warning	JAN	Copiah, Jefferson Davis, Lawrence, Rankin, Simpson	3 hr
Apr 17, 1:14 PM CDT	Severe Thunderstorm Warning	JAN	Simpson	35 min
Apr 17, 1:19 PM CDT	Flash Flood Warning	JAN	Carroll, Choctaw, Grenada, Montgomery, Webster	4 hr
Apr 17, 1:27 PM CDT	Special Weather Statement	JAN	Covington	28 min
Apr 17, 1:35 PM CDT	Special Weather Statement	JAN	Jefferson Davis	30 min
Apr 17, 1:58 PM CDT	River Flood Warning	JAN	Attala, Holmes	68 hr
Apr 17, 2:23 PM CDT	Special Weather Statement	JAN	Covington	32 min
Apr 17, 2:42 PM CDT	Special Weather Statement	JAN	Covington, Lamar	28 min
Apr 17, 3:12 PM CDT	Special Weather Statement	JAN	Forrest, Jones	28 min
Apr 17, 3:37 PM CDT	Special Weather Statement	JAN	Forrest, Jones	28 min

Nearby

Flash Flood Warnings in Mississippi, 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.