639
FNUS71 KLWX 121536
FWSLWX
SPOT FORECAST FOR A250...DOI
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1136 AM EDT FRI JUN 12 2026
FORECAST IS BASED ON FORECAST START TIME OF 1100 EDT ON JUNE 12.
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 8 PM EDT THIS EVENING
DISCUSSION
HOT AND HUMID CONDITIONS ARE EXPECTED TODAY. SKIES ARE SUNNY AT THE MOMENT,
BUT CLOUD COVER WILL BE ON THE INCREASE THROUGH THE AFTERNOON. HIGH
TEMPERATURES ARE FORECAST TO REACH INTO THE MID TO UPPER 90S THIS AFTERNOON,
WITH HEAT INDICES BETWEEN 100 AND 105 DEGREES THROUGH MUCH OF THE AFTERNOON.
AS A RESULT, A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM.
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE AREA LATER
THIS AFTERNOON AND CONTINUE INTO THIS EVENING. THERE IS STILL SOME
UNCERTAINTY WITH RESPECT TO EXACTLY WHERE THESE THUNDERSTORMS WILL FORM,
BUT AS OF NOW, THE MOST LIKELY SCENARIO APPEARS TO BE STORMS FORMING NEAR
OR JUST NORTHWEST OF THE DC METRO (AS OPPOSED TO YESTERDAY WHEN THEY FORMED
WELL TOWARD THE WEST AND COULD BE TRACKED FOR SEVERAL HOURS BEFORE REACHING
THE NATIONAL MALL). IN TERMS OF TIMING, THE STORMS ARE INITIALLY EXPECTED TO
FORM DURING THE MID-AFTERNOON HOURS. IF THEY FORM DIRECTLY OVERHEAD, A STORM
COULD BE POSSIBLE AS EARLY AS 2 PM. IF THEY FORM FURTHER OFF TO THE NORTHWEST,
THEY MAY TAKE A FEW HOURS TO MOVE IN MAKING THE MOST LIKELY TIMEFRAME
BETWEEN 3 PM AND 6 PM. A LOWER END THREAT FOR A STORM COULD LINGER AS LATE
AS 9 PM. A STORM OCCURRING THAT LATE WOULD BE CONTINGENT ON STORMS FORMING
IN WV THIS AFTERNOON AND TRACKING ACROSS THE FORECAST AREA FROM WEST TO EAST,
IN WHICH CASE, WE'D BE ABLE TO TRACK IT FOR SEVERAL HOURS IN ADVANCE. DRIER
CONDITIONS ARE EXPECTED OVERNIGHT AS DRIER AIR WORKS IN BEHIND A COLD FRONT.
ANY STORM TODAY WILL BE CAPABLE OF PRODUCING DAMAGING WINDS, WITH GUSTS TO
60 TO 70 MPH POSSIBLE IN STRONGER STORMS. IMPACTS ON THE LEVEL OF WHAT OCCURRED
YESTERDAY EVENING ARE A POSSIBILITY.
MOSTLY SUNNY SKIES ARE EXPECTED TOMORROW, WITH SLIGHTLY COOLER AND LESS HUMID
CONDITIONS.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY TO START WITH CLOUDS INCREASING THIS
AFTERNOON. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS
LATE IN THE AFTERNOON, THEN SHOWERS AND THUNDERSTORMS LIKELY
LATE IN THE AFTERNOON.
CHANCE OF PCPN......60 PERCENT.
CHANCE OF THUNDER...58 PERCENT.
MAX TEMPERATURE.....AROUND 97.
MIN HUMIDITY........48 PERCENT.
SURFACE WINDS (MPH).WEST WINDS 7 TO 8 MPH BECOMING AROUND 8 MPH
LATE IN THE AFTERNOON.
TIME (EDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 8 25 22 26 49 54
WEATHER COV..... SCH CHC CHC LKY
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH CHC CHC LKY
CHC OF PCPN (%).0 0 0 20 40 40 60
CHC OF THDR (%).0 0 0 20 40 40 60
TEMP............91 93 94 96 96 95 91
RH..............54 51 49 48 48 49 56
SURFACE WND DIR.SW W W W W W W
SURFACE WND SPD.7 7 8 8 8 8 8
SURFACE WND GST.13 14 15 15 15 15 15
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
MOSTLY CLEAR (10-20 PERCENT) LATER TONIGHT. SHOWERS
AND THUNDERSTORMS LIKELY EARLY IN THE EVENING, WITH
DRIER CONDITIONS MOVING IN OVERNIGHT.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF THUNDER...62 PERCENT.
MIN TEMPERATURE.....AROUND 67.
MAX HUMIDITY........87 PERCENT.
SURFACE WINDS (MPH).WEST WINDS AROUND 7 MPH SHIFTING TO THE
NORTHWEST OVERNIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........67 79 76 76 65 67 43 55 43 47 58 13
WEATHER COV.....LKY CHC SCH
WEATHER TYPE....RW RW RW
TSTM COV........LKY CHC SCH
CHC OF PCPN (%).70 50 20 10 0 0 0 0 0 0 0 0
CHC OF THDR (%).60 50 20 10 0 0 0 0 0 0 0 0
TEMP............89 87 84 81 79 78 76 75 73 71 69 69
RH..............59 63 72 77 79 79 79 79 79 81 84 81
SURFACE WND DIR.W W SW SW W W NW NW NW NW NW N
SURFACE WND SPD.7 7 5 5 5 5 5 5 5 5 5 5
SURFACE WND GST.14 12 10 9 10 10 12 10 10 10 10 9
SATURDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........38 PERCENT.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING WEST TO NORTHWEST AROUND
5 MPH LATE IN THE MORNING.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........9 3 6 2 4 7 4 4 4 6 4 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............67 69 71 74 79 81 83 84 85 86 87 87
RH..............87 81 79 71 58 53 49 46 45 42 40 39
SURFACE WND DIR.NW N N N N N NW NW NW W W W
SURFACE WND SPD.3 3 3 3 5 5 5 3 5 5 5 5
SURFACE WND GST.8 8 8 8 9 8 8 8 8 8 9 9
FORECASTER...PALLOZZI
REQUESTED BY...LIA MCDONALD
TYPE OF REQUEST...OTHER
.TAG 2615413.0/LWX
.DELDT 06/12/26
.FORMATTERVERSION 2.0.0
.EMAIL LIA_MCDONALD@IOS.DOI.GOV
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