Alert archive / Mississippi / Flash Flood Warnings in 2001

Flash Flood Warning 55, NWS Jackson, MS

August 11, 2001Clarke County, Jones County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 11, 2001, 9:33 AM CDT for Clarke County, Jones County, Mississippi. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 11, 2001, 9:33 AM CDT (14:33 UTC)
Expired
Aug 11, 2001, 12:00 PM CDT
In force
2 hr
Issued by
NWS Jackson, MS
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Clarke County, MS, Jones County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.6 hours before the alert went out and 129 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 2001-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1644 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2001-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1644 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
92 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.

000 
WGUS54 KJAN 111437
FFWJAN
MSC023-067-111700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
933 AM CDT SAT AUG 11 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 1200 PM CDT

* AT 933 AM CDT...NATIONAL WEATHER SERVICE RADAR AND REPORTS OUT OF 
JONES COUNTY INDICATE UPWARDS TO 3 INCHES OF RAIN HAS FALLEN THE 
PAST SEVERAL HOURS WITH SEVERAL STREETS FLOODED IN LAUREL. THIS VERY 
HEAVY RAINFALL IS ALSO MOVING INTO WESTERN CLARKE COUNTY AT THIS 
TIME. STORMS ARE MOVING SLOWLY SOUTHEAST AT 5 TO 10 MPH AND WITH 
MORE STORMS ON THE WAY...AN ADDITIONAL 1 TO 3 INCHES OF RAINFALL CAN 
BE EXPECTED IN THESE COUNTIES THROUGH MIDDAY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.

MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.

LAT...LON 3186 8862 3159 8894 3146 8892 3146 8936
          3180 8936 3181 8894 3161 8894 3187 8862
          3187 8875 3184 8881 3185 8890 3222 8890
          3222 8844 3206 8845

Nearby

Flash Flood Warnings in Mississippi, 2001Every flash flood warning in 2001

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.