Flash Flood Warning 19, NWS Morristown, TN

Issued

May 3, 1997, 3:56 AM EDT (07:56 UTC)

Expired

May 3, 1997, 9:00 AM EDT

In force

5 hr

Issued by

NWS Morristown, TN

Area

Whole counties

Counties McMinn County, TN, Polk County, TN

000 
TTAA00 KMRX 030754
FFWMRX
TNC001-009-057-093-105-107-123-139-145-155-173-031300-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE TRI CITIES TN
356 AM EDT SAT MAY 3 1997
 
THE NATIONAL WEATHER SERVICE IN KNOXVILLE TRI CITIES HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  900 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST TENNESSEE
 
   ...ANDERSON COUNTY...BLOUNT COUNTY...GRAINGER COUNTY
   ...KNOX COUNTY...LOUDON COUNTY...MCMINN COUNTY...MONROE COUNTY
   ...POLK COUNTY...ROANE COUNTY...SEVIER COUNTY...UNION COUNTY
 
THUNDERSTORMS WITH HEAVY RAIN SHOWERS HAVE BEEN MOVING OVER EAST
TENNESSEE FOR THE LAST SEVERAL HOURS. MORE STORMS WITH MODERATE TO HEAVY
RAIN SHOWERS ARE STILL IN MIDDLE TENNESSEE AND NORTHERN ALABAMA AND
NORTHERN GEORGIA AND WILL MOVE INTO THE AREA WITHIN THE NEXT TWO HOURS
PRODUCING FLASH FLOODING. SEVERAL AREAS HAVE STANDING WATER
ALREADY AND SOME CREEKS AND STREAMS ARE LIKELY OUT OF BANKS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEzGINS RISING.

NWS Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at May 3, 2:36 AM EDT, 1 hour 20 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
235 AM EDT SAT MAY 3 1997

SHORT-TERM...05Z SFC ANLYS SUGGEST WARM FTNL PASSAGE HAS OCCURRED
OVER MY CWA WITH DEWPTS RISING INTO MID 50S TO UPR 50S WHERE LOW
DEWPTS WERE NOTED EARLIER.  STILL OVERALL THE INSTBY REMAINS MARGINAL
ACROSS MY AREA AS 02/00Z MODELS HAD PROGD...SO THIS EVENT THUS FAR
COULD BE LABELLED AS HIGH SHEAR/HELICITY WITH MARGINAL INSTBY.  THE
THREAT OF SEVERE STORMS HAS DIMINISHED BUT MOST OF MY CWA REMAINS
IN SLGT RISK AREA JUST ISSUED.  COLD POOL ALOFT WILL ADVECT IN TO
STEEPEN LAPSE RATES BUT 03/00Z GRIDDED DATA DID SHOW COLDEST 500 MB
TEMPS HOLDING TO OUR NW.  VIL THRESHOLDS WILL LOWER AND WILL NEED
TO CONSIDER THIS WHEN MONITORING STORMS ON 88D FOR REST OF MRNG.

NO DOUBT THAT SYNOPTIC SCALE FORCING AND ABUNDANT MOISTURE WILL AFFECT
OUR AREA THRU AT LEAST 18Z TODAY...SO WIDESPREAD ADDITIONAL HEAVY
RAINS IN EXCESS OF 1 INCH ARE A DEFINITE THREAT.  OUR SE TN AND
PLATEAU COUNTIES HAVE RCVD HEAVIEST RAINS THUS FAR...AND A FEW FLASH
FLOOD WARNINGS MAY NEED TO BE ISSUED OVER NEXT 1-2 HRS.  THIS
SITUATION COULD BE HANDLED WITHOUT AN FFA...ESPECIALLY SINCE WX
REMAINS SO ACTIVE ACROSS THE STATE ATTM.  HIGH POPS LOOK GOOD FOR
EARLY TODAY THEN MIGHT JUST NEED CHC POPS FOR AFTN HOURS OVER SWRN
VA AND EXTRM NE TN ZONES UNTIL FNT AND SHRTWV TROF CLEAR THE REGION.
OTRW...FWC MOS WINDS FOR TYS AT 18Z IF VERIFY...SUPPORT WIND ADVISORY
FOR OUR CWA TODAY.

LATER PERIODS...DCRSG CLOUDS BY THIS EVENING AND GOOD CAA TO DROP MINS
INTO 40-45 DEG RANGE MOST SPOTS.  CAA INTO SUN WILL BATTLE STG MAY
SUNSHINE...AND CURRENT FCSTD HIGHS FOR SUN ARE CONSISTENT WITH LATEST
MOS VALUES.    #10

TG
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Flash Flood Warnings in Tennessee, 1997Every flash flood warning in 1997

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.