589
FXUS61 KLWX 131830
AFDLWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
230 PM EDT SAT SEP 13 2025
SYNOPSIS
A SECONDARY AREA OF HIGH PRESSURE WILL BE STRONGER THAN THE
CURRENT ONE AS IT BUILDS SOUTH FROM ONTARIO DURING THE FIRST
HALF OF NEXT WEEK MAINTAINING THE DRY WEATHER PATTERN. A STRONG
COLD FRONT IS FORECAST TO CROSS THE AREA NEXT WEEKEND.
NEAR TERM /THROUGH TONIGHT/
HIGH PRESSURE WILL KEEP THE REGION DRY LATE THIS AFTERNOON AND
THROUGHOUT THE NIGHT TONIGHT. TEMPERATURES IN THE LOWER 80S THIS
AFTERNOON WILL FALL INTO THE MIDDLE 50S TO LOWER 60S.
SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/
THE WARMEST DAY OF THE WEEKEND INTO NEXT WEEK WILL BE SUNDAY
WITH HIGHS IN THE MIDDLE TO UPPER 80S. DRY CONDITIONS PERSIST
UNDER PARTLY CLOUDY SKIES. ANOTHER AREA OF HIGH PRESSURE IS
FORECAST TO BUILD SOUTH INTO THE REGION BY MONDAY, BRINGING A
NORTHEAST TO EAST WIND. HIGH TEMPERATURES WILL REACH THE LOWER
80S MONDAY WITH MORE CLOUD COVER OVERSPREADING THE AREA FROM THE
SOUTH AND EAST AS LOW PRESSURE WORKS ITS WAY UP THE EAST COAST.
SUNDAY NIGHT'S LOWS WILL BE MILDER WITH TEMPERATURES DROPPING
ONLY INTO THE UPPER 50S TO LOWER 60S.
LONG TERM /TUESDAY THROUGH SATURDAY/
HIGH PRESSURE OVER NEW ENGLAND EARLY IN THE WEEK WILL SHIFT OFFSHORE
TUE AFTERNOON AS LOW PRESSURE OFF THE SOUTHEAST COAST BEGINS TO
DRIFT NORTHWARD. AS THE LOW PRESSURE CENTER APPROACHES, LIGHT RAIN
WILL OVERSPREAD SOUTHERN AREAS TUE EVENING AND IMPACT AREAS EAST OF
ROUTE 15 THROUGH WED BEFORE EXITING LATE WED NIGHT. GENERALLY LIGHT
AMOUNTS UP TO HALF INCH ARE POSSIBLE, PERHAPS UP TO AN INCH IN
SOUTHERN ST. MARY'S COUNTY. LOW PRESSURE DISSIPATES BY FRI. THEN, A
SHARP COLD FRONT ASSOCIATED WITH A CUTOFF LOW WILL CROSS THE AREA
NEXT SATURDAY. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE SAT INTO
EARLY NEXT WEEK BENEATH THE UPPER LOW. MUCH COOLER TEMPS WILL FOLLOW
IMMEDIATELY BEHIND THE FRONT.
AVIATION /18Z SATURDAY THROUGH THURSDAY/
VFR CONDITIONS THROUGH MONDAY NIGHT. WINDS SOUTH AROUND 5 KNOTS
THROUGH TONIGHT, BECOMING NORTH TO NORTHEAST AROUND 5 KNOTS
SUNDAY AND SUNDAY NIGHT. WINDS BECOMING SOUTHEAST 5 TO 10 KNOTS
MONDAY AND MONDAY NIGHT.
MVFR/IFR CIGS ARE POSSIBLE LATE TUE NIGHT/WED MORNING AS EASTERLY
ONSHORE FLOW STRENGTHENS.
MARINE
NO MARINE HAZARDS THROUGH MONDAY NIGHT. WINDS SOUTH TO SOUTHWEST
5 TO 10 KNOTS THROUGH TONIGHT. WINDS NORTH TO NORTHEAST AROUND
10 KNOTS SUNDAY AND SUNDAY NIGHT. WINDS BECOMING EAST TO
SOUTHEAST 5 TO 15 KNOTS MONDAY AND MONDAY NIGHT.
SCA CONDITIONS ARE POSSIBLE TUE AFTERNOON AND EVENING IN
EASTERLY FLOW AS LOW PRESSURE LIFTS NORTH ALONG THE MID-ATLANTIC
COAST.
TIDES/COASTAL FLOODING
A SOUTHERLY FLOW SHOULD KEEP ANOMALIES STEADY OR CAUSE THEM TO
RISE SLIGHTLY. FLOW THEN TURNS TO THE NORTH AND EAST HEADING
INTO NEXT WEEK AS HIGH PRESSURE BUILDS TO THE NORTH AND LOW
PRESSURE DEVELOPS OFF THE SOUTHEAST COAST. DEPENDING ON THE
STRENGTH OF THE FLOW, THE POTENTIAL FOR TIDAL FLOODING MAY
INCREASE BY THE MIDDLE OF NEXT WEEK.
LWX WATCHES/WARNINGS/ADVISORIES
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...NONE.
SYNOPSIS...KRR
NEAR TERM...KLW/KRR
SHORT TERM...KLW/KRR
LONG TERM...LFR
AVIATION...LFR/KLW
MARINE...LFR/KLW
TIDES/COASTAL FLOODING...KLW
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