422
FXUS61 KOKX 180116 CCA
AFDOKX
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE NEW YORK NY
916 PM EDT WED OCT 17 2018
SYNOPSIS
CANADIAN HIGH PRESSURE BUILDS TO THE SOUTH AND THEN EAST
THROUGH FRIDAY. A COLD FRONT APPROACHES FRIDAY NIGHT AND PUSHES
OFF SHORE SATURDAY. HIGH PRESSURE BUILDS IN FOR THE REST OF THE
WEEKEND AND PUSHES OFF SHORE MONDAY. ANOTHER COLD FRONT MOVES
LATE TUESDAY.
NEAR TERM /UNTIL 6 AM THURSDAY MORNING/
DRIED THE FCST OUT OVER ERN PORTIONS OF THE AREA AND ON THE
CSTL WATERS. OTHERWISE, THE FRONT IS WELL OFFSHORE AND THE FCST
IS ON TRACK.
GOOD MIXING EXPECTED THROUGH THE OVERNIGHT IN THE WAKE OF THIS
FRONT, WITH A GUSTY W/NW FLOW OF 30 TO 40 MPH. LIKELY GRADUALLY
FALLING BACK TO 25 TO 30 MPH LATE AT NIGHT.
SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/
NORTHERN STREAM SHORTWAVE AXIS SLIDES EAST THURSDAY MORNING,
WITH DEEP NW FLOW ACROSS THE REGION AS SURFACE HIGH PRESSURE
BUILDS TO THE SW OF THE REGION.
THIS SETUP SHOULD SPELL A SUNNY DAY OUTSIDE OF SOME EARLY
STRATO-CU FROM LAKE STREAMERS. WITH DEEP MIXING, NW GUSTS OF 25
TO 30 MPH ARE EXPECTED THROUGH THE AFTERNOON. 850 HPA TEMPS ONLY
MODERATING TO -6 TO -8 C WOULD SPELL HIGH TEMPS ONLY IN THE MID
TO UPPER 40S ACROSS THE REGION. THESE TEMPS ARE GENERALLY 15
DEGREES BELOW SEASONABLE.
WINDS AND GUSTS SHOULD SUBSIDE IN THE EVENING AS HIGH PRESSURE
BUILDS TOWARDS THE MID ATLANTIC. THIS SHOULD ALLOW FOR GOOD
RADIATIONAL COOLING CONDS ACROSS THE INTERIOR VALLEYS WITH A
MODERATE PROBABILITY OF A HARD FREEZE DOWN INTO THE MID TO UPPER
20S IN THESE AREAS. POTENTIAL FOR FREEZING TEMPS ACROSS THE NEXT
TIER OF ZONES SOUTH THURSDAY NIGHT, WHERE A FREEZE WATCH/WARNING
MAY BE NEEDED.
ELSEWHERE ALONG THE COASTAL PLAIN, PARTICULARLY NYC AND LI,
THERE MAY BE ENOUGH MIXING TO PRECLUDE GOOD RADIATIONAL COOLING.
TEMPS SHOULD BE ABLE TO FALL INTO THE MID TO UPPER 30S ONCE
AGAIN, WITH LOWER 40S FOR NYC/NJ METRO.
LONG TERM /FRIDAY THROUGH WEDNESDAY/
THIS PERIOD WILL START OFF WITH HIGH PRESSURE CENTERED OVER THE MID-
ATLANTIC STATES, PUSHING OFF SHORE DURING THE DAY ON FRIDAY. AN
UPPER LEVEL TROUGH OFF THE NORTHEAST COAST WILL CONTINUE TO PUSH
EAST AWAY FROM THE AREA.
A COLD FRONT WILL APPROACH FRIDAY NIGHT ALONG WITH A HIGH AMPLITUDE
TROUGH. THIS FRONT WILL MOVE THROUGH LATE IN THE DAY ON SATURDAY,
WITH A CHANCE FOR SHOWERS FOR THE ENTIRE AREA. THE UPPER LEVEL
TROUGH WILL BE SLOWER TO PUSH OFF SHORE AS A SEMI-PERMANENT LOW SETS
UP OVER SOUTHEASTERN CANADA. THIS TROUGH WILL REMAIN OVER THE
NORTHEAST THROUGH THE REST OF THE LONG TERM PERIOD AS WELL AS HELP
TO LOCK IN COOLER THAN NORMAL TEMPERATURES THROUGH THE PERIOD WITH
THE EXCEPTION OF SATURDAY, WHICH WILL BE NEAR NORMAL.
AFTER THE COLD FRONTAL PASSAGE, LAKE EFFECT PRECIPITATION WILL
COMMENCE AS COOLER AIR MOVE OVER THE GREAT LAKES. THERE IS THE
POTENTIAL FOR A SHOWER TO AFFECT NORTHWESTERN PORTIONS OF THE AREA,
SUCH AS ORANGE COUNTY. ADDITIONALLY, THE ECMWF IS HINTING AT OCEAN
EFFECT PRECIPITATION POSSIBLY AFFECT LONG ISLAND. HOWEVER,
CONFIDENCE AND PRECIPITATION AMOUNTS WILL BE TOO LOW TO INCLUDE EVEN
A SLIGHT CHANCE JUST YET, SO WILL KEEP CONDITIONS DRY FOR SATURDAY
NIGHT THROUGH THE BEGINNING OF NEXT WEEK.
THEREAFTER, A COLD FRONT APPROACHES AND MOVES THROUGH TUESDAY.
HOWEVER, THERE ARE DIFFERENCES IN THE OPERATIONAL MODELS WITH THE
TRACK OF A WEAK LOW PRESSURE SYSTEM ASSOCIATED WITH THIS FRONTAL
SYSTEM. THE ECMWF BRINGS IT FARTHER SOUTH THAN THE GFS. WILL INCLUDE
SLIGHT CHANCE POPS FOR THIS POSSIBILITY.
AVIATION /01Z THURSDAY THROUGH MONDAY/
VFR AS HIGH PRESSURE BUILDS FROM THE PLAINS STATES IN THE WAKE
OF AN EARLIER COLD FRONTAL PASSAGE. NW WINDS WILL GUST INTO THE
20S FOR MOST OF THE PERIOD, THOUGH THERE COULD BE A BRIEF LULL
IN GUSTS FROM ABOUT 08Z-09Z TIL ABOUT 13Z. WINDS ALSO LIKELY TO
VEER A LITTLE MORE NW (320 TRUE) FROM 08Z-09Z TIL ABOUT 17Z,
THEN BACK TO 290-300 TRUE THEREAFTER.
...NY METRO ENHANCED AVIATION WEATHER SUPPORT...
DETAILED INFORMATION, INCLUDING HOURLY TAF WIND COMPONENT FCSTS, CAN
BE FOUND AT: HTTP:/WWW.WEATHER.GOV/ZNY/N90
KJFK TAF COMMENTS: NO UNSCHEDULED AMD EXPECTED.
KLGA TAF COMMENTS: NO UNSCHEDULED AMD EXPECTED.
KEWR TAF COMMENTS: NO UNSCHEDULED AMD EXPECTED.
KTEB TAF COMMENTS: NO UNSCHEDULED AMD EXPECTED.
KHPN TAF COMMENTS: NO UNSCHEDULED AMD.
KISP TAF COMMENTS: NO UNSCHEDULED AMD EXPECTED.
OUTLOOK FOR 00Z FRIDAY THROUGH MONDAY
THURSDAY NIGHT
VFR WITH DIMINISHING NW WINDS.
FRIDAY
VFR. SW WINDS 10G15-20KT.
SATURDAY
CHANCE OF SHOWERS/ACCOMPANYING MVFR CONDS. SW WINDS
10-15G20-25KT.
SUNDAY
VFR. W-NW WINDS 15G20-25KT.
MONDAY
VFR.
MARINE
A STRONG COLD FRONT MOVES THRU THE WATERS THIS EVENING. THE
TIGHTENING GRADIENT AND STEEPENING LAPSE RATES IN ITS WAKE WILL
BRING GALE FORCE WIND GUSTS TO ALL WATERS THIS EVENING INTO THE
OVERNIGHT, LIKELY LINGERING OVER THE EASTERN OCEAN WATERS
THURSDAY MORNING. A GALE WARNING CONTINUES TO ADDRESS THIS
THREAT. OCEAN SEAS LIKELY BUILD TO 5 TO 9 FT ON THE OCEAN,
HIGHEST SOUTHEAST OF MORICHES INLET TONIGHT, AS WELL AS CONTINUE
AT 3 TO 5 FT FOR CENTRAL AND EASTERN LI SOUND.
WINDS WILL GRADUALLY RELENT ON THURSDAY AS CAA WANES AND
GRADIENT WEAKENS, WITH SCA CONDITIONS CONTINUING ON THE OCEAN
WATERS, BUT GUSTS LIKELY BECOMING MARGINAL ON THE NEARSHORE
WATERS. WINDS AND SEAS SHOULD FALL BELOW SCA ON ALL WATERS
THURSDAY NIGHT AS HIGH PRESSURE BUILDS TO THE SOUTH.
A PROLONGED PERIOD OF STRONG SCA CONDITIONS WILL OCCUR FRIDAY INTO
SUNDAY WITH THE APPROACH AND PASSAGE OF A STRONG COLD FRONT
SATURDAY. WAVES HEIGHTS OF 5 TO 8 FT ARE POSSIBLE ON THE OCEAN
WATERS FRIDAY NIGHT INTO SATURDAY. WIND GUSTS OF 25 KT ARE POSSIBLE
FOR ALL WATERS THROUGH SUNDAY (WITH BRIEF RESPITES FOR NON-OCEAN
WATERS), WITH SOME OCEAN ZONES POSSIBLY TOUCHING GALE FORCE WINDS
LATE FRIDAY NIGHT INTO SATURDAY.
SUB-SCA CONDITIONS EXPECTED ON MONDAY AS HIGH PRESSURE MOVES OVER
THE WATERS AND THE PRESSURE GRADIENT RELAXES.
HYDROLOGY
NO WIDESPREAD SIGNIFICANT HYDROLOGIC ISSUES ARE EXPECTED THROUGH THE
BEGINNING OF NEXT WEEK.
CLIMATE
HERE ARE THE RECORD MINIMUM HIGH TEMPERATURES FOR OCT 18TH.
LOCATION.................TEMP/YEAR
CENTRAL PARK...............45/2009
JOHN F KENNEDY AIRPORT.....49/2009
LAGUARDIA AIRPORT..........47/2009
NEWARK, NJ.................47/2009
BRIDGEPORT, CT.............47/2009
ISLIP, NY..................47/2009
EQUIPMENT
NYC NOAA WEATHER RADIO STATION KWO35 (162.55 MHZ) REMAINS OFF
THE AIR FOR AN EXTENDED PERIOD OF TIME.
OKX WATCHES/WARNINGS/ADVISORIES
CT...FREEZE WARNING FROM 4 AM TO 9 AM EDT THURSDAY FOR CTZ005>008.
NY...FREEZE WARNING FROM 4 AM TO 9 AM EDT THURSDAY FOR NYZ067-068.
NJ...FREEZE WARNING FROM 4 AM TO 9 AM EDT THURSDAY FOR NJZ002.
MARINE...GALE WARNING UNTIL 6 AM EDT THURSDAY FOR ANZ330-335-338-340-
345-355.
GALE WARNING UNTIL 11 AM EDT THURSDAY FOR ANZ350-353.
SYNOPSIS...JP/NV/JMC
NEAR TERM...JMC/NV
SHORT TERM...NV
LONG TERM...JP
AVIATION...GOODMAN
MARINE...JMC/JP/NV
HYDROLOGY...JP/NV
CLIMATE...
EQUIPMENT...
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page