Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 76, NWS Jackson, MS

July 17, 2012Clarke County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 17, 2012, 10:34 PM CDT for Clarke County, Mississippi. It was in force for 116 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 17, 2012, 10:34 PM CDT (03:34 UTC)
Expired: Jul 18, 2012, 12:30 AM CDT
In force: 116 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Clarke County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 139 km from the middle of the area, began a volume at 03:33 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, 3.6 hours before the alert went out and 149 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: 2676 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -9 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.

170 
WGUS54 KJAN 180334
FFWJAN
MSC023-180530-
/O.NEW.KJAN.FF.W.0076.120718T0334Z-120718T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1034 PM CDT TUE JUL 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN CLARKE COUNTY IN EAST CENTRAL MISSISSIPPI...

* UNTIL 1230 AM CDT

* AT 1033 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN NEAR SNELL AND HURRICANE   
  CREEK...MOVING SOUTHWEST AT 8 MPH. ESTIMATED RADAR RAINFALL        
  AMOUNTS...ON THE ORDER OF TWO TO FOUR INCHES...HAVE OCCURRED       
  SINCE 900 PM.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MIDDLETON...SYKES AND CRANDALL

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...

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

CONTACT LOCAL LAW ENFORCEMENT AND THEY WILL RELAY FLOODING REPORTS TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN JACKSON.

&&

LAT...LON 3193 8848 3196 8864 3222 8864 3222 8843

$$

40

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:29 PM CDT	Special Weather Statement	JAN	Clarke	31 min
Jul 17, 8:56 PM CDT	Special Weather Statement	JAN	Forrest	44 min
Jul 17, 10:05 PM CDT	Special Weather Statement	JAN	Clarke	45 min
Jul 17, 11:09 PM CDT	Special Weather Statement	JAN	Jasper	46 min
Jul 18, 12:13 PM CDT	Special Weather Statement	JAN	Clay, Kemper, Lowndes, Neshoba, Noxubee, Oktibbeha and 1 more	72 min
Jul 18, 1:22 PM CDT	Special Weather Statement	JAN	Clarke, Lauderdale	58 min
Jul 18, 1:38 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	52 min
Jul 18, 2:15 PM CDT	Special Weather Statement	JAN	Neshoba	30 min
Jul 18, 2:22 PM CDT	Special Weather Statement	JAN	Winston	33 min
Jul 18, 2:24 PM CDT	Special Weather Statement	JAN	Clarke	31 min
Jul 18, 2:28 PM CDT	Special Weather Statement	JAN	Lowndes	32 min
Jul 18, 2:30 PM CDT	Special Weather Statement	JAN	Smith	30 min
Jul 18, 2:34 PM CDT	Special Weather Statement	JAN	Lowndes	31 min
Jul 18, 2:59 PM CDT	Special Weather Statement	JAN	Webster	31 min
Jul 18, 3:04 PM CDT	Special Weather Statement	JAN	Jasper	31 min
Jul 18, 3:07 PM CDT	Severe Thunderstorm Warning	JAN	Clarke, Jasper	38 min
Jul 18, 3:26 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Oktibbeha, Webster	35 min
Jul 18, 3:31 PM CDT	Special Weather Statement	JAN	Webster	29 min
Jul 18, 3:44 PM CDT	Special Weather Statement	JAN	Forrest	31 min
Jul 18, 3:44 PM CDT	Severe Thunderstorm Warning	JAN	Montgomery, Webster	21 min
Jul 18, 4:15 PM CDT	Special Weather Statement	JAN	Covington	30 min
Jul 18, 4:30 PM CDT	Special Weather Statement	JAN	Leake	30 min
Jul 18, 4:42 PM CDT	Special Weather Statement	JAN	Forrest	28 min
Jul 18, 4:54 PM CDT	Special Weather Statement	JAN	Attala	31 min
Jul 18, 4:55 PM CDT	Flash Flood Warning	JAN	Forrest	2 hr
Jul 18, 4:58 PM CDT	Special Weather Statement	JAN	Smith	32 min
Jul 18, 5:03 PM CDT	Special Weather Statement	JAN	Leake	32 min
Jul 18, 5:39 PM CDT	Special Weather Statement	JAN	Holmes	31 min
Jul 18, 5:43 PM CDT	Flash Flood Warning	JAN	Lamar	88 min
Jul 18, 5:55 PM CDT	Special Weather Statement	JAN	Rankin	30 min
Jul 18, 6:24 PM CDT	Special Weather Statement	JAN	Hinds	41 min
Jul 18, 6:26 PM CDT	Special Weather Statement	JAN	Madison	29 min
Jul 18, 6:47 PM CDT	Special Weather Statement	JAN	Rankin	28 min
Jul 18, 6:53 PM CDT	Flash Flood Warning	JAN	Hinds, Madison, Rankin	93 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.