966
FNUS71 KOKX 201837
FWSOKX
SPOT FORECAST FOR NY PRESBYTERIAN HOSPITAL SOURCE RECOVERY...IDAHO NATIONAL LABORATORY
NATIONAL WEATHER SERVICE NEW YORK NY
237 PM EDT THU AUG 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 1200 EDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SHOWERS AND A FEW THUNDERSTORMS WILL BRING HEAVY RAINFALL AND AN
INCREASING POTENTIAL FOR FLASH FLOODING LATE THIS AFTERNOON INTO
A PORTION OF TONIGHT. A NEARLY STATIONARY FRONTAL BOUNDARY WILL BE DRAPED ACROSS THE
AREA AS AN MCV CURRENTLY ACROSS WESTERN PA APPROACHES. THE MCV
WILL INTERACT WITH THIS BOUNDARY, AFTERNOON SEA BREEZES, AND A
HIGH PWAT AIRMASS TO DEVELOP HEAVY SHOWERS AND EMBEDDED
THUNDERSTORMS FROM LATE THIS AFTERNOON INTO THE EVENING. DESPITE
INSTABILITY BEING MAXIMIZED TO OUR SOUTH AND WEST, CONDITIONS
ARE FAVORABLE FOR CONVECTION AND RESULTING FLASH FLOODING. THESE
INGREDIENTS WILL INTERACT WITH PWATS OF 2+ INCHES, AND DEEP
WARM CLOUD LAYER APPROACHING 15KFT SUPPORTING SCATTERED TO
NUMEROUS OCCURRENCES OF FLASH FLOODING.
FRIDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).
TEMPERATURE.........75 AT FORECAST START...MAX 79.
RH..................69 PERCENT AT FORECAST START...MIN 62 PERCENT.
SURFACE WINDS (MPH).NORTHEAST WINDS 8 TO 9 MPH.
TIME (EDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........57 58 59 48 63 54
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............75 76 77 78 79 78
RH..............69 66 67 64 62 64
SURFACE WND DIR.NE NE NE NE NE NE
SURFACE WND SPD.9 9 9 8 8 8
SURFACE WND GST.15 14 13 13 12 12
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF
SHOWERS EARLY IN THE MORNING.
TEMPERATURE.........MIN 67.
RH..................MAX 93 PERCENT.
SURFACE WINDS (MPH).NORTHEAST WINDS 6 TO 8 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING NORTHEAST AROUND
6 MPH EARLY IN THE MORNING.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........42 55 67 47 47 45 45 66 58 69 68 81
WEATHER COV..... CHC
WEATHER TYPE.... RW
TSTM COV........
TEMP............78 77 74 73 72 72 72 71 71 70 70 69
RH..............67 69 76 79 81 81 81 84 84 87 87 90
SURFACE WND DIR.NE NE NE NE NE NE NE NE NE NE NE NE
SURFACE WND SPD.8 6 5 5 4 5 4 4 4 4 5 6
SURFACE WND GST.12 9 8 7 6 7 6 6 7 7 7 8
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF
SHOWERS IN THE MORNING AND EARLY AFTERNOON,
THEN SHOWERS LIKELY LATE IN THE AFTERNOON.
SLIGHT CHANCE OF THUNDERSTORMS LATE IN THE
AFTERNOON.
TEMPERATURE.........MAX 77.
RH..................MIN 76 PERCENT.
SURFACE WINDS (MPH).NORTHEAST WINDS 6 TO 8 MPH SHIFTING TO THE EAST
AROUND 8 MPH IN THE AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........77 79 68 61 75 88 89 89 90 88 86 84
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC LKY LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH
TEMP............69 68 69 69 70 72 73 74 75 76 76 76
RH..............90 93 90 93 90 84 81 82 79 76 79 79
SURFACE WND DIR.NE NE NE NE NE NE E E E E E E
SURFACE WND SPD.6 6 6 6 6 8 8 8 8 8 8 8
SURFACE WND GST.9 9 10 10 10 12 12 13 13 13 13 12
FORECASTER...DBR
REQUESTED BY...BRYAN GILLIHAN
TYPE OF REQUEST...OTHER
.TAG 2620025.0/OKX
.DELDT 08/19/26
.FORMATTERVERSION 2.0.0
.EMAIL BRYAN.GILLIHAN@INL.GOV
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