282
FNUS71 KLWX 181448
FWSLWX
SPOT FORECAST FOR CHEMPAK FUNCTIONAL...BERKELEY COUNTY OFFICE OF EMERGENCY MANAGEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1048 AM EDT MON MAY 18 2026
FORECAST IS BASED ON FORECAST START TIME OF 0800 EDT ON MAY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
BROAD HIGH PRESSURE WILL CONTINUE TO STRENGTHEN WHILE PUSHING
FURTHER OFFSHORE THROUGH TUESDAY. SPOTTY SHOWERS AND
THUNDERSTORMS REMAIN POSSIBLE, ESPECIALLY WEST OF THE BLUE RIDGE
THIS AFTERNOON AND AGAIN TUESDAY AS MULTIPLE PIECES OF ENERGY
PASS THROUGH. A STRONG COLD FRONT WILL BRING MORE WIDESPREAD
SHOWERS AND STRONG THUNDERSTORMS TO THE AREA WEDNESDAY INTO
THURSDAY. BEHIND THIS SYSTEM, TEMPERATURES COOL WITH CONTINUED
ON AND OFF RAIN CHANCES INTO THE WEEKEND AS THE FRONT STALLS
NEARBY.
MINIMUM RELATIVE HUMIDITY VALUES WILL FALL INTO THE 30 TO 45 PERCENT
RANGE THIS AFTERNOON WITH SOUTH TO SOUTHWESTERLY WINDS GUSTING UP TO
15 MPH. EXPECT RECOVERIES BACK AROUND 70 TO 90 PERCENT MONDAY NIGHT
WITH 25 TO 35 PERCENT VALUES TUESDAY AFTERNOON AS THE RIDGE OF HIGH
PRESSURE STRENGTHENS FURTHER.
RAINFALL AMOUNTS THROUGH WEDNESDAY WILL RANGE BETWEEN A QUARTER TO A
HALF AN INCH. MOST OF THIS WILL OCCUR ON WEDNESDAY AS THE FRONT
PUSHES THROUGH.
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (80-90 PERCENT). SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS LATE IN THE
AFTERNOON.
CHANCE OF PCPN......80 PERCENT.
CHANCE OF THUNDER...MISSING.
MAX TEMPERATURE.....AROUND 92.
MIN HUMIDITY........38 PERCENT.
SURFACE WINDS (MPH).WEST WINDS 6 TO 12 MPH SHIFTING TO THE
NORTHWEST AROUND 12 MPH LATE IN THE AFTERNOON.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........25 24 24 23 44 65 86 86 86 86
WEATHER COV..... DEF DEF DEF DEF
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH SCH SCH SCH
CHC OF PCPN (%).10 10 10 10 10 10 80 80 80 80
CHC OF THDR (%).M M M M M M M M M M
TEMP............75 79 83 87 89 91 90 89 87 85
RH..............60 52 48 42 39 38 39 42 46 50
SURFACE WND DIR.SW W W W W W W W W NW
SURFACE WND SPD.6 7 9 10 12 12 12 12 12 12
SURFACE WND GST.12 14 16 18 20 20 20 20 20 20
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS EARLY IN THE
EVENING, THEN CHANCE OF RAIN SHOWERS EARLY IN
THE EVENING.
CHANCE OF PCPN......80 PERCENT.
CHANCE OF THUNDER...MISSING.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........69 PERCENT.
SURFACE WINDS (MPH).NORTHWEST WINDS 10 TO 12 MPH.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........86 86 63 64 65 66 67 67 68 73 79 84
WEATHER COV.....DEF DEF CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........SCH SCH
CHC OF PCPN (%).80 80 40 40 40 40 40 40 30 30 30 30
CHC OF THDR (%).M M M M M M M M M M M M
TEMP............82 80 77 74 71 69 67 66 64 62 60 58
RH..............55 56 60 64 68 68 68 65 65 65 64 67
SURFACE WND DIR.NW NW NW NW NW NW NW N N N N N
SURFACE WND SPD.12 10 10 10 10 10 10 12 12 12 12 12
SURFACE WND GST.20 18 18 18 20 20 20 20 20 20 21 21
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN
SHOWERS.
CHANCE OF PCPN......50 PERCENT.
CHANCE OF THUNDER...MISSING.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........40 PERCENT.
SURFACE WINDS (MPH).NORTH WINDS 6 TO 12 MPH SHIFTING TO THE
NORTHEAST AROUND 6 MPH LATE IN THE AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........81 79 76 76 75 75 74 73 72 72 72 72
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........
CHC OF PCPN (%).30 30 50 50 50 50 50 50 40 40 40 40
CHC OF THDR (%).M M M M M M M M M M M M
TEMP............57 56 56 57 59 61 62 64 65 66 66 66
RH..............67 69 66 62 57 51 50 45 43 42 40 40
SURFACE WND DIR.N N N N N N NE NE NE NE NE E
SURFACE WND SPD.12 12 12 10 9 8 7 6 6 6 6 6
SURFACE WND GST.21 22 21 18 16 14 13 12 10 10 9 9
FORECASTER...SJOHNSON
REQUESTED BY...HOPE FRIIS
TYPE OF REQUEST...OTHER
.TAG 2613921.0/LWX
.DELDT 05/18/26
.FORMATTERVERSION 2.0.0
.EMAIL HFRIIS@BERKELEYWV.ORG
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