903
FNUS71 KPHI 202331
FWSPHI
SPOT FORECAST FOR MSP OPS...EMERGENCY MANAGEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
731 PM EDT THU AUG 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 EDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
A STRONG COLD FRONT SLOWLY PUSHES THROUGH THE REGION TONIGHT. THE
FRONT WILL STALL OFFSHORE, WITH MULTIPLE AREAS OF LOW PRESSURE
MOVING ALONG THE FRONT THROUGH THE WEEKEND. HIGH PRESSURE WILL BUILD
OVER THE AREA EARLY NEXT WEEK, PUSHING THE FRONT FURTHER OFFSHORE
AND BRINGING IN A PERIOD OF MORE TRANQUIL WEATHER.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). SHOWERS AND
THUNDERSTORMS LIKELY EARLY IN THE EVENING, THEN
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS LATE
IN THE EVENING.
CHANCE OF PCPN......60 PERCENT.
MIN TEMPERATURE.....AROUND 64.
MAX HUMIDITY........100 PERCENT.
DEWPOINT............71 DECREASING TO 67 OVERNIGHT.
SURFACE WINDS (MPH).NORTHWEST WINDS AROUND 5 MPH SHIFTING TO THE
NORTH IN THE LATE EVENING AND OVERNIGHT, THEN
INCREASING TO 5 TO 6 MPH OVERNIGHT.
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH EARLY IN THE
EVENING BECOMING LIGHT, THEN BECOMING NORTH 5
TO 6 MPH OVERNIGHT. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTH 9 TO 13 MPH.
SMOKE DISPERSAL.....POOR (4100 KNOT-FT).
ADI.................5 TO 8.
TIME (EDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........82 78 48 68 64 63 66 77 77 83
WEATHER COV.....LKY SCH
WEATHER TYPE....RW RW
TSTM COV........LKY SCH
CHC OF PCPN (%).60 20 10 10 10 10 10 10 0 0
TEMP............73 71 70 70 69 68 68 67 66 66
DEWPOINT........73 71 70 70 69 68 68 67 66 66
RH..............100 100 100 100 100 100 100 100 100 100
20 FT WIND DIR..NW N N N N N N N N N
20 FT WIND SPD..5 5 5 3 3 5 5 5 6 6
20 FT WIND GUST.10 10 9 9 10 10 10 12 13 13
SURFACE WND DIR.NW N N N N N N N N N
SURFACE WND SPD.5 5 5 3 3 5 5 5 6 6
SURFACE WND GST.10 10 9 9 10 10 10 12 13 13
MIX HGT (KFT)...0.5 0.6 0.6 0.9 0.7 0.7 0.5 0.9 0.9 0.9
TRANSP WIND DIR.N N N N N N N N N N
TRANSP WIND SPD.10 12 9 10 13 13 12 12 10 10
ADI.............7 8 6 5 6 8 8 8 7 7
VRATE KT-FT/1K..4 6 5 8 8 7 5 9 8 8
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR
FORECASTER...MANNING
REQUESTED BY...AUSTIN FRYE
TYPE OF REQUEST...OTHER
.TAG 2620128.0/PHI
.DELDT 08/20/26
.FORMATTERVERSION 2.0.0
.EMAIL AUSTIN.FRYE@MARYLAND.GOV
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