Flash Flood Warning 78, NWS Jackson, KY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON KY
325 PM EST SUN NOV 10 2002

SEVERE WEATHER SCENARIO CONTINUES TO UNFOLD ACROSS THE AREA. RECORD
BREAKING HIGH TEMPERATURES ARE OCCURRING IN THE LARGE DRY/WARM SLOT
OUT AHEAD THE COLD FRONT. INGREDIENTS ARE VERY WELL EVIDENT FOR
SEVERE WEATHER FOR THIS EVENING. 18Z SFC CHART SHOWING SQUALL LINE
FORMING OUT AHEAD OF THE BOUNDARY FROM NE IN TO SE IL. IT ALSO
CONTINUES TO BE SUGGESTED THAT CONVECTION WILL BEGIN TO DEVELOP OUT
AHEAD OF THIS MAIN LINE OF ACTIVITY AS THE CAP ERODES AWAY. WIND
PROFILE CONTINUES TO LOOK VERY IMPRESSIVE...ALONG WITH STRONG
SURFACE CONVERGENCE...AMPLE MOISTURE ADVECTION...LARGE OMEGA
VALUES...AND UPPER AIR DIVERGENCE. THIS SITUATION WILL HAVE TO BE
MONITORED CLOSELY.

THE OTHER CONCERN TONIGHT IS THE POTENTIAL FOR HEAVY RAINFALL. WHILE
INDIVIDUAL CELLS ARE ZIPPING NORTHEAST...THE MAIN SQUALL LINE IS
PROGRESSING AT A MUCH SLOWER RATE. TRAINING WILL BE LIKELY AS THIS
CONVECTIVE LINE MOVES INTO THE AREA. AS FFG VALUES ARE RELATIVELY
LOW...A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THE ENTIRE AREA UNTIL
4 AM.

CLOUDS WILL BE SLOW TO ERODE IN THE WAKE OF THE FRONT AS LOW LEVEL
MOISTURE HANGS TOUGH THROUGH MID-WEEK. HAVE ALSO OPTED TO HOLD ONTO
SHOWERS IN THE MORNING AS POST FRONTAL TROUGH LAGS BEHIND THE MAIN
FRONT. TEMPS WILL ALSO BE SLOW TO RISE TOMORROW AS COOLER AIR
FILTERS IN FROM THE NW. MODELS CONTINUE TO HANDLE MONDAY NIGHT
THROUGH WEDNESDAY WITH UNCERTAINTY. S/WS WILL BE DIFFICULT TO TIME
AND PLACE. HAVE KEPT THE TRENDING OF WEATHER ELEMENTS VERY SIMILAR
TO THE PREVIOUS PACKAGE WITH ONLY MINOR ADJUSTMENTS MADE.

NO MAJOR CHANGES MADE TO THE EXTENDED.

.JKL...NONE.

GEOGERIAN

PREV FCST DISCUSSIONS FOLLOW:
---------------------------------------------------------------------

1050 AM EST SUN NOV 10 2002

...SEVERE STORMS VERY LIKELY LATE THIS AFTERNOON AND TONIGHT...HEAVY
RAINS ALSO EXPECTED...

THE FORECAST AREA IS IN THE CALM BEFORE THE STORM. NUMEROUS CONCERNS
FOR THIS AFTERNOON AND ESPECIALLY THIS EVENING.

LATEST SFC CHART SHOWING THE COLD FRONT EXTENDS FROM A LOW PRESSURE
AREA OVER LAKE MICHIGAN...SWRD ACROSS IL/MO/AR. DEWPOINTS HAVE CREPT
UP OUT OF TN TO AROUND 65 DEGREES AND HAVE MOVED INTO PORTIONS OF
CNTRL KY. VERY STRONG DYNAMICS AND LOWER AND UPPER LVL JETS TO WORK
WITH. STORM MOTION EXPECTED TO BE ABOUT 250-260 AROUND 40-50KTS.
SEVERE WEATHER A GOOD BET LATE. HIGH WINDS...HAIL AND ISOLATED
TORNADOES NOT OUT OF THE QUESTION AT ALL. LOOKS LIKE MOST OF THE
ACTION WILL BE FROM AROUND 21Z OR SO UNTIL AROUND 06Z. 00Z-06Z
APPEARS TO BE WHEN MOST OF THE ACTIVITY WILL OCCUR...BUT ALSO EXPECT
SOME ISOLATED STRONG STORMS TO DEVELOP OUT AHEAD OF THE MAIN SQUALL
LINE LATE THIS AFTERNOON.

RADARS ARE QUIET AT THIS TIME. SFC OBS AND SAT PICS SHOWING SOME BIG
WHOLES DEVELOPING IN THE SKY COVER WHICH WILL ONLY SERVE TO
DESTABILIZE THINGS FURTHER. FEEL THAT TEMPS ARE GOING TO BE A LITTLE
WARMER THAN EARLIER THOUGHT.

HEAVY PCPN ALSO A CONCERN. THE NORTHERN 1/2 OF THE CWA SAW VERY
INTENSE BUT SHORT DURATION RAINFALL RATES THIS MORNING WITH SOME
FAST AND GENEROUS RUNOFF ALSO...(RAINFALL RATES WERE AROUND 1 INCH
IN 15 MINUTES)...STORM TOTAL SHOWING 1-2 RAINS FELL THIS MORNING
ACROSS THE N 1/2...WHICH IS IMPRESSIVE CONSIDERING THAT THE STORMS
WERE MOVING AT 50-60 MPH OR SO. LOOKING TOWARD THE 12Z FFG VALUES TO
COME IN THIS MORNING...BUT THE VALUES ARE ALREADY LOW ENUFF TO BE
CONCERNED ABOUT A FLASH FLOOD WATCH FOR TONIGHT.

ALL SAID AND DONE...WILL UPDATE ZONES TO RAISE MAX TEMPS. WILL
FRESHEN UP WORDING...WILL LOWER POPS ACROSS THE NORTH. WILL KEEP CHC
POPS GOING CWA WIDE FOR AFTERNOON/LATE AFTERNOON ACTIVITY. WILL
FRESHEN UP THE HWO PRODUCT IN A LITTLE WHILE.

WE DO PLAN TO ISSUE A FLASH FLOOD WATCH LATER THIS AFTERNOON...TO BE
IN EFFECT FOR TONIGHT UNTIL AROUND 4 AM.

UPDATED ZONES AND GRIDS OUT BEFORE LONG.

(FLASH FLOOD WATCH WILL BE ISSUED LATER THIS AFTERNOON FOR TONIGHT)

HALL
---------------------------------------------------------------------

...SIGNIFICANT CONVECTIVE DEVELOPMENT EXPECTED THIS AFTERNOON AND
EVENING...

MODERATE TO HIGH RISK CONVECTIVE OUTLOOK HAS BEEN ISSUED FOR EASTERN
KENTUCKY...ADDRESSED IN CURRENT HAZARDOUS WEATHER OUTLOOK.

LATEST MODELS ARE ALL IN GOOD AGREEMENT THROUGH 12Z MON AM. MINOR
TIMING DIFFERENCES. CONVECTIVE DEVELOPMENT HAS BEEN ONGOING AN
MOVING INTO EASTERN KENTUCKY. DEWPOINTS HAVE SHOT UP AS THE FLOW HAS
COME AROUND TO SLIGHTLY WEST OF SOUTH. ALONG WITH GRADIENT WINDS ANY
CONVECTION WHICH DOES DEVELOP WILL MIX DOWN ENVIRONMENTAL WINDS.

TEMPERATURES WILL AGAIN BE A CHALLENGE TODAY. PLENTY OF CLOUDS AND
SHOWERS THIS MORNING SHOULD KEEP TEMPS DOWN A FEW DEGREES...BUT
STRONG SOUTHERLY FLOW SHOULD OFFSET THE LACK OF INSOLATION.  TEMPS
NEAR OR MAYBE A DEGREE ABOVE YESTERDAYS HIGHS. GOING CLOSER TO AVN
MOS TEMPERATURES AS THIS HAS BEEN THE MODEL TO BEAT.

MORE ORGANIZED CONVECTION WILL DEVELOP LATER THIS AFTERNOON AND
EVENING. MODEL SOUNDINGS SHOW LARGE CAPE AND HELICITIES OF 400+.
THUS HAVE INCLUDED GUSTY WORDING IN THE ZONES AND POTENTIAL SEVERE
TS WORDING THIS EVENING.

THIS TROF WILL SWING THROUGH LATE TONIGHT INTO MONDAY AND LOOKS LIKE
MONDAY WILL BE A RATHER BLUSTERY DAY WITH ABUNDANT LOW LEVEL
MOISTURE. CLEARING LATER MONDAY NIGHT BUT NOT ENOUGH DRYING AND WITH
CONTINUED NORTHWESTERLY CYCLONIC FLOW SHOULD SEE LINGERING SHOWERS
UNTIL LATER IN THE WEEK.

PRELIMINARY GUIDANCE NUMBERS...
LOZ EE 070/050 056/047 049 024+2
JKL EE 072/052 058/047 049 024+2
FGX TE 069/049 051/043 048 02++2
IOB TE 070/049 052/044 049 028+2
K22 EW 073/054 061/047 049 023+5
7K0 EW 072/055 061/047 049 021+8
K20 EW 071/053 059/047 049 022+5
SME TE 073/049 056/047 049 025+2
1A6 EW 073/052 058/047 048 022+7

LEWIS

=====================================================================

924 PM EST SAT NOV 9 2002

CURRENT ZONE FCST HAS CONDITIONS WELL COVERED. PCPN TRYING TO MOVE
INTO SERN KY...BUT STILL VERRRY LIGHT...AND ONLY INTO A COUPLE OF
COUNTIES.  HOWEVER...DEEP MOISTURE WITH 60 DEG F DWPTS IN WRN KY
MOVING EAST SO SHOULD SEE AN INCREASE IN OUR CWFA AND WILL CONTINUE
POPS FOR TONIGHT. MAIN ENERGY WITH S/WV TO MOVE UP THE OH RVR BUT
SHOULD TRAIL A TROF THROUGH AREA. TIMING WRONG FOR SVR WX BY THE
TIME IT REACHES ERN KY AND MOISTURE IS LACKING. WILL KEEP EYE ON
MOISTURE ADVECTION AND STRENGTH OF STORMS NOW ENTERING CNTRL KY.

NO UPDATE ANTICIPATED ATTM.

DUSTY

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-111200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON KY
1215 PM EST SUN NOV 10 2002

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN KENTUCKY.

.DAY ONE...

THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA INDICATES THAT THERE
IS A MODERATE TO HIGH RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF EASTERN KENTUCKY LATE THIS AFTERNOON AND EVENING. THE HIGH RISK
OF SEVERE STORMS WILL BE MAINLY ALONG AND WEST OF THE I-75 CORRIDOR.
THE MODERATE RISK COVERS THE REST OF THE EAST KENTUCKY AREA.

THE INGREDIENTS APPEAR TO BE COMING TOGETHER FOR A POTENTIALLY
SIGNIFICANT SEVERE WEATHER EPISODE ACROSS MUCH OF KENTUCKY LATE THIS
AFTERNOON AND EVENING. DAMAGING WINDS...LARGE HAIL AND ISOLATED
TORNADOES ARE POSSIBLE. HEAVY RAINS ARE ALSO EXPECTED THIS EVENING.

A STRONG COLD FRONT IS FORECAST TO MOVE INTO KENTUCKY LATE TODAY.
AHEAD OF THIS FRONT...STRONG SOUTHERLY WINDS ARE PUMPING
UNSEASONABLY WARM AND MOIST AIR INTO THE COMMONWEALTH.  WITH THE
ADDITION OF  DAYTIME HEATING...THE ATMOSPHERE IS BECOMING VERY
UNSTABLE THIS AFTERNOON. IN ADDITION...WINDS IN THE LOWER ATMOSPHERE
WILL CONTINUE TO BE QUITE STRONG.

PRELIMINARY INDICATIONS SUGGEST THAT A FAST MOVING SQUALL LINE WILL
DEVELOP AND RACE ACROSS KENTUCKY DURING THE LATE AFTERNOON AND
EVENING HOURS. BECAUSE OF THE STRONG WIND FIELDS...THERE IS A GOOD
POSSIBILITY OF WIDESPREAD WIND DAMAGE WITH THIS LINE OF STORMS.
ADDITIONALLY...STRONG LOW-LEVEL WIND SHEAR IS EXPECTED...AND THIS
WILL INCREASE THE PROBABILITY OF TORNADOES ACROSS THE AREA.

THE OTHER POTENTIAL HAZARD WILL BE STRONG GRADIENT WINDS. GUSTY
SOUTH TO SOUTHWEST WINDS OF 25 TO 30 MPH WILL BE POSSIBLE EARLY THIS
MORNING AND INTO THE AFTERNOON HOURS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS AND SPOTTER GROUPS WILL LIKELY BE
NECESSARY LATER TODAY.

.DAYS TWO THROUGH SEVEN...

THE STRONG COLD FRONT WILL MOVE THROUGH THE REGION LATE TONIGHT INTO
MONDAY MORNING.  AFTER THE FRONT HAS PASSED...NO HAZARDOUS WEATHER
IS EXPECTED THROUGH THE REMAINDER OF THE PERIOD.

THIS IS AN EVOLVING WEATHER SITUATION. PERSONS SHOULD STAY UPDATED
ON THE LOCAL FORECAST, AND FORTHCOMING HAZARDOUS WEATHER OUTLOOKS,
SHOULD CONDITIONS CHANGE.

ADDITIONAL INFORMATION...DETAILS AND DISCUSSIONS ARE CONTAINED IN
OTHER NATIONAL WEATHER SERVICE FORECASTS AND STATEMENTS. CHECK OUR
WEBSITE AT WWW.CRH.NOAA.GOV/JKL.

HALL