Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 71, NWS Jackson, MS

July 5, 2012Simpson County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 5, 2012, 4:16 PM CDT for Simpson County, Mississippi. It was in force for 50 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 5, 2012, 4:16 PM CDT (21:16 UTC)
Expired: Jul 5, 2012, 5:06 PM CDT
In force: 50 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 45 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 53 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: 1329 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 28 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.

725 
WGUS54 KJAN 052116
FFWJAN
MSC127-052315-
/O.NEW.KJAN.FF.W.0071.120705T2116Z-120705T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
416 PM CDT THU JUL 5 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SIMPSON COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PINOLA...MENDENHALL...

* UNTIL 615 PM CDT

* AT 416 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  MARTINVILLE TO PINOLA TO SHIVERS. THE STORMS WERE NEARLY           
  STATIONARY. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO 
  INCHES...HAVE OCCURRED IN THE PAST HOUR.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SANATORIUM

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
HOUR 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 3192 8966 3185 8980 3177 9002 3190 9006
      3201 8974

$$

GRG

1 follow-up statement

158 
WGUS74 KJAN 052206
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
506 PM CDT THU JUL 5 2012

MSC127-052217-
/O.CAN.KJAN.FF.W.0071.000000T0000Z-120705T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIMPSON MS-
506 PM CDT THU JUL 5 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SIMPSON COUNTY...

LAT...LON 3192 8966 3185 8980 3177 9002 3190 9006
      3201 8974

$$

GRG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:16 PM CDT	Special Weather Statement	JAN	Madison	29 min
Jul 5, 9:29 AM CDT	Special Weather Statement	JAN	Oktibbeha	61 min
Jul 5, 1:20 PM CDT	Severe Thunderstorm Warning	JAN	Madison	25 min
Jul 5, 1:42 PM CDT	Severe Thunderstorm Warning	JAN	Lincoln	33 min
Jul 5, 2:22 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott	23 min
Jul 5, 2:40 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Smith	23 min
Jul 5, 2:52 PM CDT	Severe Thunderstorm Warning	JAN	Copiah	23 min
Jul 5, 3:34 PM CDT	Severe Thunderstorm Warning	JAN	Simpson, Smith	30 min
Jul 5, 3:37 PM CDT	Severe Thunderstorm Warning	JAN	Simpson	23 min
Jul 5, 3:58 PM CDT	Severe Thunderstorm Warning	JAN	Sharkey, Simpson, Yazoo	32 min
Jul 5, 4:18 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	27 min
Jul 5, 4:32 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Warren	28 min
Jul 5, 5:00 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Hinds, Warren	30 min
Jul 5, 5:23 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Warren	37 min
Jul 5, 5:38 PM CDT	Severe Thunderstorm Warning	JAN	Warren	26 min
Jul 5, 5:51 PM CDT	Special Weather Statement	JAN	Adams	29 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.