National Weather Service National Headquarters

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KOKX 161733
AFDOKX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW YORK NY
133 PM EDT THU MAY 16 2013

.SYNOPSIS...
WEAK HIGH PRESSURE BRIEFLY BUILDS IN TODAY AHEAD OF AN APPROACHING
COLD FRONT. THE FRONT WILL THEN PASS THROUGH THE AREA THIS EVENING.
HIGH PRESSURE WILL BE OVER THE REGION FOR THIS WEEKEND...AND THEN
SLOW MOVING LOW PRESSURE OVER THE MID SECTION OF THE COUNTRY WILL
IMPACT THE AREA NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
SKIES ARE RAPIDLY CLEARING WITH A MOSTLY SUNNY AFTERNOON EXPECTED.
ONCE THE CLOUDS CLEAR...TEMPERATURES WILL RAPIDLY JUMP 8-10
DEGREES WITH HIGHS REACHING THE MIDDLE AND UPPER 70S TO LOWER 80S
ACROSS MUCH OF THE REGION. A FEW COASTAL LOCATIONS MAY ONLY REACH
THE LOWER 70S HOWEVER WITH A SOUTHERLY FLOW OFF THE COOLER WATERS.

USED A BLEND OF THE MET/MAV MOS.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
A DRY COLD FRONTAL PASSAGE THIS EVENING WILL ALLOW FOR A WIND
SHIFT BACK TO THE NW WITH MODERATE COLD ADVECTION.

THEREAFTER...A HIGH AMPLITUDE UPPER RIDGE OVER THE MID SECTION OF
THE COUNTRY WILL TRANSLATE SLOWLY EAST THROUGH THE UPCOMING
WEEKEND. THIS WILL RESULT IN ABUNDANT SUNSHINE AND TEMPERATURES
JUST ABOVE SEASONABLE LEVELS. AT THE SURFACE...HIGH PRESSURE
BUILDS SE FROM THE UPPER MIDWEST AND GREAT LAKES ON FRI.

USED A MET/MAV MOS BLEND DURING THIS PERIOD.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
SFC HIGH PRES BUILDS OVER THE AREA STARTING FRIDAY NIGHT AND THEN
WILL MOVE OFFSHORE ON SATURDAY. CONDOS WILL BE DRY WITH TEMPERATURES
CLIMBING INTO THE 70S ACROSS MOST OF THE CWA...BUT TEMPS WILL BE
LIMITED TO THE UPPER 60S/AROUND 70 FOR COASTAL CT AND LONG ISLAND AS
AFTERNOON SEA BREEZES DEVELOP AND KEEP TEMPS DOWN...COMPARED TO THE
INTERIOR. WITH THE HIGH OFFSHORE ON SUNDAY...EASTERLY FLOW
DEVELOPS...AND THIS WILL KEEP TEMPS GENERALLY IN THE MID 60S TO
AROUND 70. LOW PRES MOVES INTO THE SOUTHEAST U.S. ON SUNDAY...AND
MODELS INDICATING CONVECTIVE ACTIVITY LIFTING TOWARDS THE LOCAL
AREA. HOWEVER...THINK THE BACKSIDE OF THE OFFSHORE HIGH WILL BE
STRONG ENOUGH TO KEEP ANY CONVECTION WELL WEST OF THE AREA AND WILL
GO WITH A DRY FORECAST ON SUNDAY. LATEST GFS SEEMS A BIT OVERBLOWN
WITH THE PLACEMENT OF THE QPF...AT LEAST COMPARED WITH THE ECMWF.

LOW PRES WILL CONTINUE TO SPIN OVER THE SOUTHEAST U.S. FOR THE START
OF THE NEW WORK WEEK...AND WITH THE HIGH DEPARTING...SOME SHOWERS
AND TSTMS WILL WORK THEIR WAY NORTH TOWARDS THE WESTERN PORTIONS OF
THE CWA MONDAY-TUESDAY. BY WEDNESDAY...SLOW-MOVING LOW PRES WILL
MOVE INTO THE OHIO VALLEY...INDICATING WETTER WEATHER IMPACTING THE
REGION FOR THE MIDDLE OF NEXT WEEK.

&&

.AVIATION /17Z THURSDAY THROUGH MONDAY/...
-- Changed Discussion --
HIGH CONFIDENCE IN VFR THROUGH THE TAF PERIOD.

MAINLY WEST FLOW EXPECTED ACROSS TERMINALS REMAINDER OF THIS
AFTERNOON WITH THE EXCEPTION OF NYC/LI TERMINALS WHERE AN ONSHORE
COMPONENT WILL PREVAIL UNTIL AROUND SUNSET. GUSTY WINDS POSSIBLE
MID AFTERNOON BUT SHOULD BE LIMITED TO AROUND 20KT. MEDIUM
CONFIDENCE ON TIMING AND STRENGTH OF GUSTS BUT AMENDMENTS MAY BE
NEEDED FOR STRONGER GUSTS OR TIMING CHANGES. AFTER 00Z...WINDS
BECOMING NW AROUND 10 KT.


     NY METRO ENHANCED AVIATION WEATHER SUPPORT...

DETAILED INFORMATION...INCLUDING HOURLY TAF WIND COMPONENT FCSTS CAN
BE FOUND AT:  HTTP:/WWW.ERH.NOAA.GOV/ZNY/N90 (LOWER CASE)

KEWR FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJUSTMENTS.

KJFK FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJUSTMENTS.

KLGA FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJUSTMENTS.

KTEB FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJUSTMENTS.

KHPN FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJUSTMENTS.

KISP FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR WIND ADJSUTMENTS.

.OUTLOOK FOR 18Z FRIDAY THROUGH TUESDAY...
.FRIDAY THROUGH SATURDAY...VFR.
.SATURDAY NIGHT...SUNDAY AND MONDAY...CHANCE OF SUB-VFR CONDS IN
RAIN SHOWERS.
-- End Changed Discussion --

&&

.MARINE...
FORECAST UPDATE TO EXTEND THE SMALL CRAFT ADVISORY UNTIL 6PM FOR
THE WATERS FROM SANDY HOOK NJ TO FIRE ISLAND INLET NJ...WHERE SEAS
ARE TAKING A BIT LONGER TO FALL BELOW 5 FT. OTHERWISE...WEAK HIGH
PRESSURE ACROSS THE WATERS TODAY WILL GIVE WAY TO ANOTHER COLD
FRONT TONIGHT...FOLLOWED BY HIGH PRESSURE BUILDING IN FOR FRI FROM
THE NW. LINGERING SEAS AROUND 5 FT ON THE OCEAN WATERS TODAY WILL
KEEP A SCA POSTED.

SUB-SCA CONDS EXPECTED FOR THE WEEKEND AND START OF THE NEW WEEK AS
HIGH PRES BUILDS OVER THE AREA EARLY IN THE WEEKEND AND DEPARTS LATE
IN THE WEEKEND. WITH LOW PRES OVER THE SOUTHEAST U.S. EARLY IN THE
NEW WEEK...DEVELOPING SWELLS WILL PUSH SEAS TO 5-7 FT ON THE OCEAN
WATERS AND A PROLONGED PERIOD OF SCA CONDS ARE POSSIBLE THROUGH NEXT
WEEK.

&&

.HYDROLOGY...
NO SIGNIFICANT WIDESPREAD PRECIPITATION IS EXPECTED THROUGH
EARLY NEXT WEEK.

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
NY...NONE.
NJ...NONE.
MARINE...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 6 PM EDT THIS
     EVENING FOR ANZ350-353-355.

&&

$$
SYNOPSIS...MPS/DW
NEAR TERM...BC
SHORT TERM...DW
LONG TERM...MPS
AVIATION...IRD/LN
MARINE...BC/MPS/DW
HYDROLOGY...MPS/DW