720
FNUS71 KLWX 251701
FWSLWX
SPOT FORECAST FOR MDEM REQUEST...MARYLAND DEPT OF EMERGENCY MANAGEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
101 PM EDT WED JUN 25 2025
FORECAST IS BASED ON FORECAST START TIME OF 1300 EDT ON JUNE 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
..HEAT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
DISCUSSION
VERY HOT AND HUMID CONDITIONS ARE BEING OBSERVED THIS AFTERNOON,
AND WILL CONTINUE INTO THIS EVENING. CURRENT HEAT INDEX VALUES
ARE IN THE 105 TO 108 DEGREE RANGE AROUND THE SEARCH SITE, AND
COULD MAKE A RUN AT 110 BEFORE THE AFTERNOON IS DONE. THAT IS
THE PRIMARY THREAT THIS AFTERNOON, SO CONSIDER SEVERAL BREAKS,
DRINKING PLENTY OF FLUIDS, AND SEEKING SHADE AS MUCH AS POSSIBLE.
THE SECONDARY THREAT WILL BE THUNDERSTORMS, WHICH HAVE STARTED TO
DEVELOP IN AREAS NORTH AND WEST OF THE SEARCH SITE. THIS CHANCE
INCREASES OVER THE NEXT COUPLE OF HOURS AND INTO THIS EVENING,
WHERE A 30 TO 40 PERCENT CHANCE OF STORMS IS EXPECTED.
DANGEROUS HEAT INDEX VALUES LIKELY CONTINUE INTO THE EVENING, NOT
DROPPING BELOW 90 UNTIL CLOSE TO MIDNIGHT OR SO.
THIS DOME OF HIGH PRESSURE WILL WEAKEN THE SECOND HALF OF THE WEEK,
ALLOWING A FRONT TO SETTLE TOWARD THE AREA THURSDAY AND FRIDAY WITH
GREATER CHANCES FOR SHOWERS AND THUNDERSTORMS. THE FRONT WILL LIFT
BACK TO THE NORTH THIS WEEKEND, BUT CONTINUED HOT AND HUMID
CONDITIONS WILL SUPPORT DAILY SHOWER AND THUNDERSTORM DEVELOPMENT.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). ISOLATED SHOWERS
AND THUNDERSTORMS EARLY IN THE AFTERNOON.
SCATTERED SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF THUNDER...35 PERCENT.
MAX TEMPERATURE.....AROUND 97.
MIN HUMIDITY........45 PERCENT.
HEAT INDEX..........MISSING.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTH AROUND 5 MPH.
TIME (EDT) 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 41 42 42 53
WEATHER COV..... ISO SCT SCT SCT
WEATHER TYPE.... RW RW RW RW
TSTM COV........ ISO SCT SCT SCT
CHC OF PCPN (%).10 20 30 30 30
CHC OF THDR (%).10 20 20 30 40
TEMP............96 97 95 95 93
RH..............45 43 46 48 51
SURFACE WND DIR.NW NW NW NW N
SURFACE WND SPD.3 5 5 5 5 SURFACE WND GST.8 9 9 9 9
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). SCATTERED
THUNDERSTORMS IN THE EVENING. SCATTERED SHOWERS
THROUGH THE NIGHT. CHANCE OF THUNDERSTORMS
OVERNIGHT.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF THUNDER...34 PERCENT.
MIN TEMPERATURE.....AROUND 74.
MAX HUMIDITY........94 PERCENT.
HEAT INDEX..........MISSING.
SURFACE WINDS (MPH).NORTH WINDS AROUND 5 MPH BECOMING LIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........49 57 60 43 49 40 32 36 38 29 36 33
WEATHER COV.....SCT SCT SCT SCH SCH SCH SCH CHC SCH SCH
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW
TSTM COV........SCT SCT SCT SCH SCH SCH SCH CHC SCH SCH
CHC OF PCPN (%).30 30 30 20 20 20 20 30 20 20 10 10
CHC OF THDR (%).30 30 30 30 30 30 20 20 10 10 10 0
TEMP............91 89 86 84 82 82 80 79 78 76 76 75
RH..............54 57 65 73 76 78 83 86 88 93 93 94
SURFACE WND DIR.N N N N NW NW N N W NW NW NW
SURFACE WND SPD.5 3 2 2 2 2 2 2 2 2 2 2
SURFACE WND GST.8 8 7 7 6 6 6 6 6 6 6 6
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE MORNING, THEN
SHOWERS AND THUNDERSTORMS LIKELY IN THE
AFTERNOON.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF THUNDER...45 PERCENT.
MAX TEMPERATURE.....AROUND 93.
MIN HUMIDITY........60 PERCENT.
HEAT INDEX..........MISSING.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING EAST AROUND 5 MPH LATE IN
THE AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........42 32 26 19 11 14 17 20 34 51 48 55
WEATHER COV.....SCH SCH SCH CHC LKY LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH LKY LKY LKY LKY
CHC OF PCPN (%).20 10 10 10 10 20 20 30 60 70 70 70
CHC OF THDR (%).0 0 0 0 0 10 10 10 40 40 40 50
TEMP............74 76 78 82 85 88 90 91 92 91 90 88
RH..............95 89 87 81 72 66 62 60 57 58 62 65
SURFACE WND DIR.N N N N N W W W W NE E E
SURFACE WND SPD.2 2 2 2 2 2 2 3 3 5 5 5
SURFACE WND GST.6 6 6 6 6 6 7 7 8 9 9 9
FORECASTER...LEDBETTER
REQUESTED BY...AUSTIN FRYE
TYPE OF REQUEST...SAR
.TAG 2516655.0/LWX
.DELDT 06/25/25
.FORMATTERVERSION 2.0.0
.EMAIL AUSTIN.FRYE@MARYLAND.GOV
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