Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 73, NWS Jackson, MS

July 11, 2012Holmes County, Humphreys County, Leflore County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 11, 2012, 3:07 PM CDT for Holmes County, Humphreys County, Leflore County, Mississippi. It was in force for 3 hr. 1 report 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
Jul 11, 2012, 3:07 PM CDT (20:07 UTC)
Expired
Jul 11, 2012, 5:41 PM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Holmes County, MS, Humphreys County, MS, Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 111 km from the middle of the area, began a volume at 20:10 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

TimeReportWhereRemark
Jul 11, 3:20 PM CDTFLASH FLOODBelzoni, MSMANY STREETS FLOODED. SOME STREETS CLOSED DUE TO FLOODING.

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.1 hours before the alert went out and 105 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2012-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 435 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2012-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
435 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
463 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
2 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.

681 
WGUS54 KJAN 112007
FFWJAN
MSC051-053-083-112300-
/O.NEW.KJAN.FF.W.0073.120711T2007Z-120711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
307 PM CDT WED JUL 11 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN HOLMES COUNTY IN CENTRAL MISSISSIPPI...
  NORTHERN HUMPHREYS COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BELZONI...
  SOUTHWESTERN LEFLORE COUNTY IN NORTH CENTRAL MISSISSIPPI...

* UNTIL 600 PM CDT

* AT 307 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN NEAR BELZONI. THE STORMS
  WERE NEARLY STATIONARY. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE
  ORDER OF ONE TO THREE INCHES...HAVE OCCURRED IN THE PAST HOUR.

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

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT 
ONE TO 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.

&&

LAT...LON 3333 9018 3327 8995 3316 8998 3310 9056
      3323 9063 3337 9033

$$

BYB
2 follow-up statements
999 
WGUS74 KJAN 112147
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
447 PM CDT WED JUL 11 2012

MSC051-053-083-112300-
/O.CON.KJAN.FF.W.0073.000000T0000Z-120711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEFLORE MS-HUMPHREYS MS-HOLMES MS-
447 PM CDT WED JUL 11 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
NORTHWESTERN HOLMES...NORTHERN HUMPHREYS AND SOUTHWESTERN LEFLORE
COUNTIES...

AT 430 PM CDT...A MEMBER OF THE PUBLIC IN BELZONI REPORTED RECENT 
STATIONARY HEAVY RAIN AMOUNTED TO 5 INCHES IN THEIR RAIN GAUGE. 
BASED ON RADAR RAINFALL ESTIMATES THE RAINFALL TOTALS WERE MAXIMIZED 
IN THE CITY OF BELZONI AND WERE GENERALLY MUCH LESS ELSEHWERE IN THE 
WARNED AREA. THIS MEMBER OF THE PUBLIC...ALONG WITH LAW 
ENFORCEMENT...REPORTED MANY ROADS AT LEAST BRIEFLY CLOSED IN THE 
CITY OF BELZONI DUE TO THE HIGH WATER. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SWIFTOWN

HEAVY RAINFALL WILL REMAIN POSSIBLE OVER THE WARNED AREA FOR THE 
NEXT HOUR WITH AN ADDITIONAL ONE INCH 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 3333 9018 3327 8995 3316 8998 3310 9056
      3323 9063 3337 9033

$$

BYB
018 
WGUS74 KJAN 112241
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
541 PM CDT WED JUL 11 2012

MSC051-053-083-112251-
/O.CAN.KJAN.FF.W.0073.000000T0000Z-120711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEFLORE MS-HUMPHREYS MS-HOLMES MS-
541 PM CDT WED JUL 11 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
HOLMES...NORTHERN HUMPHREYS AND SOUTHWESTERN LEFLORE COUNTIES...

LAT...LON 3333 9018 3327 8995 3316 8998 3310 9056
      3323 9063 3337 9033

$$
BYB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 11:51 AM CDTSpecial Weather StatementJANAdams, Franklin, Jefferson59 min
Jul 11, 12:35 PM CDTSpecial Weather StatementJANClaiborne, Copiah, Hinds, Lawrence, Lincoln, Rankin and 2 more70 min
Jul 11, 1:23 PM CDTSpecial Weather StatementJANCovington, Hinds, Jefferson Davis, Lawrence, Marion, Rankin and 3 more72 min
Jul 11, 2:11 PM CDTSpecial Weather StatementJANCovington, Forrest, Hinds, Jasper, Jones, Lamar and 4 more54 min
Jul 11, 2:51 PM CDTSpecial Weather StatementJANClarke, Jasper, Jones, Leake, Madison, Neshoba and 3 more69 min
Jul 11, 4:34 PM CDTSpecial Weather StatementJANKemper, Lauderdale46 min

Nearby

Flash Flood Warnings in Mississippi, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.