Severe Thunderstorm Warning 253, NWS Baltimore/Washington

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
300 PM EDT MON SEP 1 2003

...SHORT TERM (TNGT AND TUE)...

A WEAK FRONTAL SYSTEM JUST N OF THE CWA MEANS A HUMID AIRMASS WILL
BE THE RULE HROUGH THE SHORT TERM. PRECIP. WATER IS JUST OVER 2
INCHES...AND REMAINS OF GRACE OVER SRN PLAINS WILL GET CAUGHT UP THE
CONFLUENT FRNTL ZNS ARCHING UP THROUGH THE MS/OH VALLEY. INSTABILITY
FOR TNGHT AND TUE IS NOT TOO IMPRESSIVE...WITH MDL CAPE VALUES ON
TUE FROM THE MESOETA OF 1000-1500 J/KG. AT 85H THE BEST MOISTURE
AXIS AND HENCE HIGHEST PRECIP POTENTIAL WILL REMAIN JUST N OF THE
REGION THROUGH TUE EVENING.

FOR TONIGHT...RADAR SHOWING SCT RW/TRW ACTIVITY OVER WV THAT IS NOW
ENTERING SWRN PORTION OF OUR CWA. WL KEEP POPS UP THIS
EVENING...THEN ACTIVITY SHOULD DIMINISH AFTER SUNSET. MADE MINOR
ADJST TO GRIDDED TEMPS/DEW PTS FOR THE OVERNIGHT.

FOR TUE...LOTS OF CLOUDS AROUND AS NCEP/CANDADIAN MDLS BRING BROAD
BAND OF HI RH ACROSS THE REGION. SRN 1/3RD OF CWA MAY BE ABLE TO
KEEP MORE SUN...AND KEPT TEMPS ALITTLE HIGHER. OTHERWISE...GOOD BET
OF RW/TRW ACROSS NRN TIER OF ZNS WHERE DECENT ISENTROPIC LIFT AND
MID-LVL FN CONVERGENCE ARE THE BEST. IF THERE ARE SOME BREAKS IN THE
CLDS SOME PLACES COULD SEE TRW...BUT IT WILL MOSTLY BE RW.

MARINE IS FAIRLY QUIET IN THE SHORT TERM. NO FLAGS.

SMZ

XNTD...

ITS CONTINUING TO LOOK LIKE THERE WL BE XTNSV CLD CVR THROUGHOUT
THE WK AS STATIONARY BNDRY CONTS TO HANG ARND THE MID ATLC RGN TUE
NGT-WED. WL KEEP THE POPS AT CHC...W/ BEST CHC ACROSS THE N. WE HV
BEEN TALKING ABT PSBL FLOODING MID-LATE WK VIA FLD PTNL STMT. FEEL
BEST CHCS FOR HVY RA ARE WED NGT-THU AS REMNANTS OF TD GRACE GET
DRAWN UP THE APLCHNS. TO ADD FOCUS UPR TROF/CD FNT SWINGS DOWN FM
THE GRT LKS. POPS WL BE LKLY ACROSS NRN 2/3 OF CWA..CHC SRN 1/3. HV
UPDATED ESF TO HIGHLITE WED NGT/THU AS BEST TIMES FOR ANY FLOODING
TO DVLP. CURRENTLY FFG GUID VALUES ARE AT 2/HR OR HIER...3-4/3 HRS.

CD FNT DOESNT MV VERY QUICKLY THRU FRI...AND HV CHC POPS OF TRW.
FNT FINALLY PUSHES OFF THE CST ON SAT. WL KEEP SAT DAY-MON DRY.
TEMPS WL BE ALONG THE LINE OF NRML EARLY SEP AVGS.

ATTM FABIAN LOOKS TO STAY WELL OUT TO SEA THIS WKND AND IS NOT A
PLAYER IN THE FCST.

WOODY

.LWX...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.

DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042-
050>057-WVZ048>055-020900-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1130 AM EDT MON SEP 1 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE CHESAPEAKE
BAY AND EAST OF GARRETT COUNTY...THE DISTRICT OF COLUMBIA...NORTHERN
VIRGINIA...THE NORTHERN AND CENTRAL SHENANDOAH VALLEY...AND THE
EASTERN PANHANDLE OF WEST VIRGINIA.

.DAY ONE...TODAY
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

.DAYS TWO THROUGH SEVEN...
PERIODS OF HEAVY RAINS AND THUNDERSTORMS ARE POSSIBLE ANYTIME FROM
TUESDAY NIGHT THROUGH EARLY FRIDAY. THIS MAY CAUSE RAPID RISES OF
SMALL CREEKS AND STREAMS THROUGHOUT THE AREA. A FLOOD POTENTIAL
OUTLOOK WAS ISSUED TO DISCUSS FLOOD POSSIBILITIES. MAIN STEM RIVER
FLOODING IS NOT LIKELY ...ALTHOUGH NOTICEABLE RISES MAY OCCUR.

SMZ

VAZ050-056-012300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
555 PM EDT MON SEP 1 2003

AT 555 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
MADISON RUN...MOVING EAST NORTHEAST AT 30 MPH.

THIS STORM WILL DROP AN INCH OR TWO OF RAIN AND WILL BE CAPABLE OF
PRODUCING WIND GUSTS OF 40 TO 50 MPH. THIS STORM WILL AFFECT ORANGE
COUNTY AND WESTERN SPOTSYLVANIA COUNTY THROUGH 645 PM.

RDH