Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 44, NWS Jackson, MS

April 17, 20125 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Apr 17, 2012, 12:00 PM CDT for 5 counties in 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
Apr 17, 2012, 12:00 PM CDT (17:00 UTC)
Expired
Apr 17, 2012, 3:00 PM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Copiah County, MS, Jefferson Davis County, MS, Lawrence County, MS, Rankin County, MS, Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 48 km from the middle of the area, began a volume at 16:59 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
Apr 17, 2:00 PM CDTFLASH FLOOD6 Nnw Brandon, MSFLOODING WAS REPORTED ON WIRTZ ROAD IN FLOWOOD

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, 5.0 hours before the alert went out and 51 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 2012-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 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 2012-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.19395878Sfc1 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
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.

185 
WGUS54 KJAN 171700
FFWJAN
MSC029-065-077-121-127-172000-
/O.NEW.KJAN.FF.W.0044.120417T1700Z-120417T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1200 PM CDT TUE APR 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN COPIAH COUNTY IN CENTRAL MISSISSIPPI...
  SOUTHERN RANKIN COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...STAR...RICHLAND...PEARL...FLOWOOD...
  BRANDON...
  SIMPSON COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PINOLA...MENDENHALL...
  WESTERN JEFFERSON DAVIS COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  LAWRENCE COUNTY IN SOUTH CENTRAL MISSISSIPPI...

* UNTIL 300 PM CDT

* AT 1159 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE   
  EXTENDING FROM RICHLAND TO 15 MILES WEST OF KOKOMO...MOVING        
  NORTHEAST AT 10 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE     
  ORDER OF ONE TO THREE INCHES...HAVE OCCURRED IN THE PAST SIX HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TOPEKA...ROCKPORT...FLORENCE...OMA...WANILLA...MONTEREY...
  MONTICELLO...HARRISVILLE...UNION...ROBINWOOD...PINEY WOODS...ARM...
  TILTON...SHIVERS...HEBRON...OAK VALE...PROGRESS...CATO...JOHNS...
  MARTINVILLE AND SANATORIUM

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

RAINFALL AMOUNTS FROM ONE TO THREE INCHES A HOUR CAN CAUSE FLOODING
ON WOODGATE DRIVE NEAR THE CROSSGATES SWIM CLUB.

RAINFALL AMOUNTS FROM ONE TO THREE INCHES A HOUR CAN CAUSE FLOODING
ON INDUSTRIAL DRIVE IN THE CITY OF RICHLAND.

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 9024 3202 9022 3205 9025 3205 9023
      3209 9025 3215 9024 3220 9019 3226 9020
      3239 9007 3225 8973 3196 8975 3151 8991
      3140 8995 3139 9004 3133 9006

$$

BYB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 9:54 AM CDTFlash Flood WarningJANHolmes, Yazoo4 hr
Apr 17, 10:17 AM CDTFlash Flood WarningJANClaiborne, Hinds, Madison, Warren4 hr
Apr 17, 10:32 AM CDTFlash Flood WarningJANCopiah, Lincoln3 hr
Apr 17, 1:14 PM CDTSevere Thunderstorm WarningJANSimpson35 min
Apr 17, 1:19 PM CDTFlash Flood WarningJANCarroll, Choctaw, Grenada, Montgomery, Webster4 hr
Apr 17, 1:27 PM CDTSpecial Weather StatementJANCovington28 min
Apr 17, 1:35 PM CDTSpecial Weather StatementJANJefferson Davis30 min
Apr 17, 1:58 PM CDTRiver Flood WarningJANAttala, Holmes68 hr
Apr 17, 2:23 PM CDTSpecial Weather StatementJANCovington32 min
Apr 17, 2:42 PM CDTSpecial Weather StatementJANCovington, Lamar28 min
Apr 17, 3:12 PM CDTSpecial Weather StatementJANForrest, Jones28 min
Apr 17, 3:37 PM CDTSpecial Weather StatementJANForrest, Jones28 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.