552
FXUS61 KALY 270720
AFDALY
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ALBANY NY
320 AM EDT TUE MAY 27 2025
SYNOPSIS
HIGH PRESSURE WILL BRING FAIR AND DRY WEATHER TODAY WITH
SLIGHTLY ABOVE NORMAL TEMPERATURES. CLOUDS THICKEN AND LOWER
TONIGHT WITH SOME LIGHT SHOWERS IMPACTING LOCATIONS MAINLY
SOUTH AND WEST OF THE CAPITAL REGION ON WEDNESDAY. A PERIOD OF
WET AND UNSETTLED WEATHER IS EXPECTED WEDNESDAY NIGHT THROUGH
THURSDAY AHEAD OF A LOW PRESSURE SYSTEM MOVING INTO THE GREAT
LAKES REGION.
NEAR TERM /THROUGH TODAY/
AS OF 320 AM EDT...MORNING RADIATIONAL MIST/FOG SHOULD BURN OFF
QUICKLY WITH A CHILLY START TO THE DAY. MID AND UPPER LEVEL
RIDGING WILL BUILD IN OVER NY AND NEW ENGLAND TODAY. HIGH
PRESSURE AT THE SURFACE WILL RIDGE IN FROM THE SOUTHEAST ONTARIO
OVER THE NORTHEAST. THE STRONG SUBSIDENCE SHOULD YIELD MAINLY
DRY CONDITIONS. AN ISOLATED SPRINKLE MAYBE POSSIBLE OVER THE
HIGHER TERRAIN WITH SOME DIURNAL CUMULUS, BUT PARTLY TO MOSTLY
SUNNY CONDITIONS CAN BE EXPECTED WITH SOME HIGH CLOUDS
INCREASING FROM THE SOUTH AND WEST WELL IN ADVANCE OF LOW
PRESSURE NEAR THE TN VALLEY. H850 TEMPS WILL BE IN THE +8C TO
+10C RANGE BASED ON THE LATEST GFS. MAX TEMPS WILL BE CLOSE TO
THE LATEST NBM VALUES WITH SUPPORT FROM THE NAM/EC MOS WITH
HIGHS IN THE MID AND UPPER 70S BELOW 1000 FT IN ELEVATION AND
MID 60S TO LOWER 70S OVER THE HIGHER TERRAIN WITH LIGHT AND
VARIABLE DIRECTION WINDS.
SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/
KEY MESSAGE:
- HIGH CONFIDENCE FOR BELOW NORMAL TEMPS ON THU WITH A WIDESPREAD
RAINFALL IMPACTING EASTERN NY AND WESTERN NEW ENGLAND.
TONIGHT, MID AND HIGH CLOUDS WILL CONTINUE TO INCREASE, THICKEN
AND LOWER, AS THE SFC ANTICYCLONE MOVES SOUTH AND EAST OF LONG
ISLAND AND THE SOUTHEAST NEW ENGLAND COAST. FLAT MID-LEVEL
RIDGING WILL REMAIN OVER THE FORECAST AREA. LOWS WILL BE
SLIGHTLY MILDER IN UPPER 40S TO MID 50S.
THE LATEST CAMS INCLUDING THE 3-KM HRRR AND ENSEMBLE GUIDANCE
CONTINUE TO SHOW A SLOW TREND FOR LIGHT RAINFALL/SHOWERS TO
EXPAND NORTH/NORTHEAST ACROSS THE ALY FORECAST AREA ON WED. THE
LOW/MID LEVEL RIDGING AND LOW-LEVEL DRY AIR MAY HOLD ON FOR A
DRY DAY FOR LOCATIONS NORTH/NORTHEAST OF I-90 AND THE CAPITAL
REGION. TEMPS WILL BE NEAR OR SLIGHTLY BELOW NORMAL WITH CLOUDY
CONDITIONS. WARMEST TEMPS WILL BE FROM ALBANY NORTH AND EAST IN
THE LOWER TO MID 70S, AND EXPECT 60S SO SPOTTY 70F READING SOUTH
AND WEST. THE PRIMARY SFC CYCLONE MOVES TOWARD THE CENTRAL-
EASTERN GREAT LAKES REGION WED NIGHT WITH AN OCCLUDED FRONT
MOVING ACROSS PA INTO NY. A WEAK SECONDARY COASTAL CYCLONE FORMS
NEAR THE DELMARVA REGION. THE LOW TO MID LEVEL WARM ADVECTION
AND ISENTROPIC LIFT INCREASES FOR SPOTTY SHOWERS TO FORM INTO A
STRATIFORM RAIN SHIELD WED NIGHT WITH WIDESPREAD PROBABILITIES
FOR RAIN IN THE 55-75% RANGE. DUE TO WET BULB COOLING LOWS FALL
INTO THE MID 40S TO MID 50S.
THE MID/UPPER LEVEL TROUGH TURNS NEGATIVELY TILTED AND SHEARS
OUT THU WITH THE PRIMARY LOW NEAR LAKE ONTARIO AND THE SECONDARY
SCOOTING NORTHEAST NEAR SOUTHERN NEW ENGLAND. THE STRATIFORM
RAINFALL WILL TAPER TO SCATTERED TO NUMEROUS SHOWERS BY THE
AFTERNOON WITH A DRY SLOT APPROACHING. WE INCLUDED A RUMBLE OF
THUNDER OR TWO OVER THE W-CENTRAL MOHAWK VALLEY/SOUTHWEST
ADIRONDACKS EARLY THU NIGHT WITH DECREASING SHOWERS OVERNIGHT.
THE LATEST NBM PROBABILITIES FOR 24-HR RAINFALL AMOUNTS >0.50"
ENDING BY 00Z FRI/8 PM THU ARE ONLY 20-40% FOR EASTERN NY AND
WESTERN NEW ENGLAND. DESPITE THE GRAY AND WET CONDITIONS, THE
RAINFALL IS NOT EXPECTED TO BE TOO HEAVY. TEMPS WILL RUN COOLER
THAN NORMAL ON THU BY 5-10 DEGREES WITH 60S AND SOME 50S OVER
THE HIGHER TERRAIN. LOWS WILL BE SIMILAR TO THE PREVIOUS NIGHT.
LONG TERM /FRIDAY THROUGH MONDAY/
KEY MESSAGES:
- ACTIVE LONG TERM WITH DAILY PRECIPITATION CHANCES
- NEAR TO BELOW NORMAL TEMPERATURES INITIALLY RISING BACK ABOVE
NORMAL LATE IN THE PERIOD
DISCUSSION:
UPSTREAM TROUGH/CLOSED LOW ALOFT SHOULD BE JUST TO OUR WEST ACROSS
THE GREAT LAKES TO START THE LONG TERM PERIOD, WITH GOOD AGREEMENT
OF THIS AMONGST DETERMINISTIC/ENSEMBLE GUIDANCE. HEADING INTO THE
WEEKEND, THIS TROUGH IS PROGGED TO PHASE WITH A WEAK SHORTWAVE
APPROACHING FROM THE OHIO RIVER VALLEY AND A MUCH STRONGER,
STRENGTHENING SHORTWAVE/CLOSED LOW DIVING SOUTH FROM ONTARIO/QUEBEC
INTO THE NORTHEAST. THIS SYSTEM WILL LINGER ACROSS THE NORTHEAST
THROUGH MONDAY.
THERE IS STILL QUITE A BIT OF DISAGREEMENT WITH REGARDS TO STORM
EVOLUTION IN THE LOWER LEVELS, AS DETERMINTIC GUIDANCE OFTEN
STRUGGLES WITH SYSTEM PHASING AND PLACEMENT OF STRONGEST LIFT/TRACK.
REGARDLESS, IT LOOKS LIKE ANOTHER ACTIVE PERIOD OF WEATHER IS IN
STORE FOR THE REGION FROM THE END OF THIS WEEK INTO EARLY NEXT WEEK
WITH DAILY CHANCES OF RAIN. THUNDERSTORMS CANNOT BE RULED OUT, BUT
CONFIDENCE ON HOW MUCH INSTABILITY IS ACHIEVED IS LOW AT THIS TIME.
NEAR TO BELOW NORMAL TEMPERATURES ARE FAVORED FROM THE END OF THIS
WEEK INTO THE WEEKEND WITH THE TROUGH/CLOSED LOW KEEPING PERSISTENT
CLOUD COVER IN PLACE AND LIMITING OVERALL DAYTIME HEATING. HOWEVER,
THERE IS AGREEMENT AMONGST DETERMINISTIC GUIDANCE IN A WARMUP BY
EARLY TO MID NEXT WEEK WITH STRONG RIDGING BUILDING EASTWARD INTO
THE GREAT LAKES AND OHIO RIVER VALLEY.
AVIATION /07Z TUESDAY THROUGH SATURDAY/
THROUGH 06Z/WED...MAINLY VFR CONDITIONS EXPECTED THROUGH THE
TAF PERIOD WITH THE EXCEPTION OF KGFL, WHERE SOME PATCHY GROUND
FOG MAY LEAD TO INTERMITTENT IFR/LIFR VSBYS/CIGS BETWEEN ROUGHLY
06Z-12Z/TUES. LIGHT/VARIABLE WINDS OVERNIGHT WILL TREND INTO
THE SOUTHWEST TO SOUTH AT LESS THAN 10 KTS THIS AFTERNOON. WINDS
WILL RETURN TO LIGHT/VARIABLE AGAIN THIS EVENING WITH
INCREASING MID/HIGH LEVEL CLOUDS.
OUTLOOK...
WEDNESDAY NIGHT: HIGH OPERATIONAL IMPACT. LIKELY SHRA...RA.
THURSDAY: HIGH OPERATIONAL IMPACT. LIKELY SHRA...RA.
THURSDAY NIGHT: MODERATE OPERATIONAL IMPACT. CHANCE OF SHRA.
FRIDAY: LOW OPERATIONAL IMPACT. SLIGHT CHANCE OF SHRA.
FRIDAY NIGHT: MODERATE OPERATIONAL IMPACT. CHANCE OF SHRA.
SATURDAY: MODERATE OPERATIONAL IMPACT. LIKELY SHRA.
SATURDAY NIGHT: MODERATE OPERATIONAL IMPACT. CHANCE OF SHRA.
SUNDAY: LOW OPERATIONAL IMPACT. SLIGHT CHANCE OF SHRA.
ALY WATCHES/WARNINGS/ADVISORIES
CT...NONE.
NY...NONE.
MA...NONE.
VT...NONE.
SYNOPSIS...WASULA
NEAR TERM...WASULA
SHORT TERM...WASULA
LONG TERM...SPECK
AVIATION...SPECK
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