Alert archive / Mississippi / Flash Flood Warnings in 2001

Flash Flood Warning 70, NWS Jackson, MS

September 3, 2001Covington County, Jefferson Davis County, Mississippi

NWS Jackson, MS issued this flash flood warning at Sep 3, 2001, 4:30 AM CDT for Covington County, Jefferson Davis County, Mississippi. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 3, 2001, 4:30 AM CDT (09:30 UTC)
Expired: Sep 3, 2001, 7:30 AM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Covington County, MS, Jefferson Davis County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 9.5 hours before the alert went out and 88 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: 110 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 255 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 030937
FFWJAN
MSC031-065-031230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
430 AM CDT MON SEP 3 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JEFFERSON DAVIS COUNTY IN SOUTH CENTRAL MISSISSIPPI
  COVINGTON COUNTY IN SOUTHEAST MISSISSIPPI

* UNTIL 730 AM CDT

* AT 430 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED            
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN FROM PRENTISS AND          
  BASSFIELD...TO COLLINS...REDDOCH AND SEMINARY...MOVING NORTHEAST 
  AT 15 TO 20 MPH.

DOPPLER RADAR ESTIMATES RAINFALL RATES OF ONE TO TWO INCHES PER HOUR 
OCCURRING ACROSS THE WARNED AREA WITH MORE ACTIVITY APPROACHING FROM 
THE WEST AND SOUTHWEST. ANOTHER TWO TO THREE INCHES IS POSSIBLE 
THROUGH THE MORNING. AS A RESULT...A FLASH FLOOD WARNING IS IN 
EFFECT FOR JEFFERSON DAVIS AND COVINGTON COUNTIES OF SOUTHEAST 
MISSISSIPPI UNTIL 730 AM CDT.

SOILS IN THESE COUNTIES ARE ALREADY VERY SATURATED AND ANY FURTHER 
HEAVY RAINFALL WILL MOST LIKELY RUN-OFF INTO AREA CREEKS AND STREAMS 
AS WELL AS ROADWAYS. BE ESPECIALLY CAUTIOUS WHEN IT IS DARK AS IT IS 
HARDER TO RECOGNIZE FLOODED ROADWAYS AND LOW-LANDS.

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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this flash flood warning went out at Sep 3, 3:30 AM CDT, 1 hour earlier.

Area forecast discussion, Sep 3, 3:30 AM CDT, 1 hour before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
330 AM CDT MON SEP 3 2001

RADAR IMAGERY SHOWS RAIN CONTINUING OVER CWFA. 00Z PRECIP WATER
VALUES WERE AOA 2.0 OVER LOWER MS RIVER VALLEY. ETA/AVN MODELS
TREND TOWARDS GRADUAL CHANGE IN PATTERN...AS SLOW-MOVING MID-LEVEL
TROUGH AXIS LIFTS NE OUT OF REGION. LATER IN THIS FORECAST
CYCLE...HIGH PRESSURE BUILDS OVER SWRN STATES/ ROCKIES...AS GREAT
LAKES HIGH PRESSURE SLIDES E. WITH TIME...THIS RIDGE OF HIGH
PRESSURE WILL EXTEND INTO CENTRAL PLAINS.

IN SHORT-TERM...SW FLOW CONTINUES OVER REGION AS BOUNDARY DRAPED
ACROSS SRN STATES FROM CAROLINAS INTO LA. IN ETA/AVN/NGM...SHOWERS/
THUNDERSTORMS DEVELOP. HEAVY RAINFALL STILL POSSIBLE TODAY...MAINLY
ERN ZONES. MODELS TREND TOWARDS MORE DIURNAL PRECIPITATION PATTERN
FROM TUE ON. BY 00Z TUE...SURFACE LOW PRESSURE CENTER SHIFTS INTO
AL...WITH HEAVIEST PRECIP OVER SRN APPALACHIANS.

WILL EXTEND FFA THROUGH TODAY FOR ERN ZONES AS AXIS OF STRONGEST
VORTICITY PUSHES E INTO AL. GROUND ALREADY SOGGY FROM DAYS OF
PRECIP. EXPECT RAINFALL AMOUNTS OF 1 TO 2 POSSIBLE...SINCE PRECIP
WATER VALUES AOA 2. ISOLATED GREATER TOTALS COULD OCCUR.

CONDITIONS SHOULD IMPROVE THROUGH AFTERNOON...AS ETA BEGINS TO DRY
OUT REGION FROM NW. WINDS BECOMING MORE NW TO NE WITH TIME. IN
MODELS...SHEAR AXIS STILL ACROSS CENTRAL/SRN ZONES TUE/TUE NIGHT...
WITH ABUNDANT LOWER-LEVEL MOISTURE IN PLACE. WILL KEEP TREND OF
DIURNAL PRECIP FOR TUE/TUE NIGHT.

...EXTENDED FORECAST...
SHEAR AXIS STILL IN PLACE OVER CWFA IN MRF WILL CONTINUE CHANCE
PRECIP. BY 00Z SAT...MRF DEVELOPING FRONT FROM CAN INTO SRN PLAINS.
THIS SIGNIFICANT FRONT SHIFTS INTO LOWER MS RIVER VALLEY AFTER 12Z
SAT... FINALLY ALLOWING HIGH PRESSURE TO BUILD OVER SRN STATES BY
12Z SUN. DRY SUN/MON.

JAN 87/71/89/70  7453
MEI 86/71/89/69  8553

.JAN...
MS...FFA ZONES 029>033-037>039-044>046-050>052-056>058-064>066-
     072>074 TODAY.
LA...NONE.
AR...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 8:15 PM CDT	Flash Flood Warning	JAN	Madison	3 hr
Sep 3, 5:12 AM CDT	Flash Flood Warning	JAN	Clarke, Jasper	4 hr
Sep 3, 5:30 AM CDT	Flash Flood Warning	JAN	Madison	3 hr
Sep 3, 6:07 AM CDT	Flash Flood Warning	JAN	Adams, Franklin	3 hr
Sep 3, 7:25 AM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis, Lawrence	3 hr
Sep 3, 8:50 AM CDT	Flash Flood Warning	JAN	Simpson	115 min
Sep 3, 9:00 AM CDT	Flash Flood Warning	JAN	Lincoln	2 hr
Sep 3, 9:27 AM CDT	Flash Flood Warning	JAN	Rankin	2 hr
Sep 3, 10:25 AM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis, Lawrence	2 hr
Sep 3, 10:35 AM CDT	Flash Flood Warning	JAN	Hinds	115 min
Sep 3, 10:39 AM CDT	Flash Flood Warning	JAN	Jasper, Simpson, Smith	2 hr
Sep 3, 10:50 AM CDT	Flash Flood Warning	JAN	Lincoln	115 min
Sep 3, 1:14 PM CDT	Flash Flood Warning	JAN	Hinds, Rankin	2 hr
Sep 3, 1:31 PM CDT	Flash Flood Warning	JAN	Claiborne	119 min
Sep 3, 5:27 PM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis	2 hr

Nearby

Flash Flood Warnings in Mississippi, 2001 Every 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.