Tuesday, September 21, 2021

7-Day Forecast

Coastal Flood Advisory

Today: Mostly cloudy, with a high near 80°. Light and variable wind becoming southeast 5 to 9 mph in the morning.

Tonight: A slight chance of showers after midnight. Cloudy, with a low around 70°. East wind 6 to 8 mph. Chance of precipitation is 20%.

Area Forecast Discussion

000  
FXUS61 KLWX 210757
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
357 AM EDT Tue Sep 21 2021

.SYNOPSIS...
High pressure over northern New England will maintain a surface
ridge into the area through Tuesday morning. Am upper-level
disturbance will pass over the region tonight into Wednesday
morning. A strong cold front will then pass through later
Wednesday into Thursday. Canadian high pressure will then build
overhead late this week into the weekend.

Space Weather Forecast Discussion

:Product: Forecast Discussion
:Issued: 2021 Sep 21 0030 UTC
# Prepared by the DOC, NOAA, Space Weather Prediction Center
#
Solar Activity

.24 hr Summary...
Solar activity was at very low levels. Region 2871 (S29E50, Dao/beta)
continued to produce numerous B-class flares. Region 2872 (N17E42,
Cro/beta) showed very limited growth and remained inactive. New Region
2873 (N26W07) is comprised of several immature sunspots lacking even
rudimentary penumbra and was also inactive.

No Earth-directed CMEs were noted. The 19 Sep CME may pass close enough
to Earth to produce minor effects midday on 23 Sep.

.Forecast...
Solar activity is expected to be very low, with a chance for C-class
activity on 20-23 Sep, due to potential flare activity from Region 2871.

Climate Report

000  
CDUS41 KLWX 202125
CLIDCA

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
525 PM EDT MON SEP 20 2021

...................................

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR SEPTEMBER 20 2021...
VALID TODAY AS OF 0500 PM LOCAL TIME.

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2021


WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 80 1:46 PM 94 1895 79 1 69
MINIMUM 64 6:11 AM 41 1916 63 1 46
AVERAGE 72 71 1 58

PRECIPITATION (IN)
TODAY 0.00 1.43 1938 0.13 -0.13 0.00
MONTH TO DATE 2.40 2.65 -0.25 4.48
SINCE SEP 1 2.40 2.65 -0.25 4.48
SINCE JAN 1 37.58 30.56 7.02 40.33

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