It rained, and it rained a lot in the D.C. area: Storm totals

Rainfall totals estimated by National Weather Service

Rainfall totals estimated by National Weather Service

The deep tropical moisture feed that gushed through the D.C. metro region delivered hefty rainfall totals as expected.

Rain Thursday afternoon into this morning totaled roughly 2-4 inches along and west of I-95 and 1-3 inches east of I-95. Isolated pockets west of I-95 received 4-5 inches.

Through 10 a.m., the totals at our three airports were: Dulles 3.88 inches, Reagan National 2.65 inches and BWI 1.64″

Western areas received greater totals due to a wave of thunderstorms that paraded through Thursday afternoon and evening, dumping up to 1-3 inches of rain. Locations farther to the east missed out on this surge due to their distance away from the front and a narrow ribbon of dry, sinking air adjacent to the main plume of moisture over the Virginia and North Carolina Piedmont.

NAM model shows ribbon of low relative humidity (dry air) at high altitudes (around 10,000 feet) at 4 p.m. Thursday (WeatherBell.com)

NAM model shows ribbon of low relative humidity (dry air) at high altitudes (around 10,000 feet) at 4 p.m. Thursday just east of I-95 (WeatherBell.com)

As the front marched east early this morning, everyone got in on the action with extremely heavy rainfall rates – around one inch per hour. Between 5 and 6 a.m., Dulles Airport picked up 0.91 inches of rain. Between 6 and 7 a.m., Reagan National Airport tallied 1.11 inches. And between 7 and 8 a.m., BWI cashed in with 0.63 inches.

30-day rainfall totals in the region are now in the 6-12 inches rain – two to four times what’s normal. For the calendar year, total precipitation at Reagan National and Dulles airports are around 7 inches above normal.

30-day rainfall totals from the National Weather Service.

30-day rainfall totals from the National Weather Service.

The National Weather Service posted this fairly comprehensive list of rainfall totals from this most recent storm:

**********************24 HOUR RAINFALL**********************

LOCATION              24 HOUR     TIME/DATE   COMMENTS
                     RAINFALL           OF
                     /INCHES/   MEASUREMENT

DISTRICT OF COLUMBIA

...DISTRICT OF COLUMBIA...
   DALECARLIA RESERVOIR  2.90   800 AM  5/16  CO-OP OBSERVER
   5 NW WASHINGTON       2.82   800 AM  5/16  COCORAHS
   NATIONAL ARBORETUM    2.33   800 AM  5/16  CO-OP OBSERVER

MARYLAND

...ALLEGANY COUNTY...
   MOUNT SAVAGE          2.00   624 AM  5/16  TRAINED SPOTTER
   FROSTBURG             1.92   700 AM  5/16  CO-OP OBSERVER
   CUMBERLAND            1.63   731 AM  5/16  CO-OP OBSERVER
   1 S CUMBERLAND        1.63   700 AM  5/16  CO-OP OBSERVER
   1 SSE CRESAPTOWN-BEL  1.55   700 AM  5/16  COCORAHS

...BALTIMORE COUNTY...
   1 SW TOWSON           1.96   800 AM  5/16  COCORAHS
   NE REISTERSTOWN       1.31   700 AM  5/16  COCORAHS
   1 SW LONG GREEN       1.03   700 AM  5/16  COCORAHS

...CARROLL COUNTY...
   4 NE TANEYTOWN        1.78   700 AM  5/16  COCORAHS
   1 W WESTMINSTER       1.36   500 AM  5/16  COCORAHS
   3 NW SYKESVILLE       1.05   530 AM  5/16  COCORAHS

...CHARLES COUNTY...
   2 ESE BRYANS ROAD     2.51   700 AM  5/16  COCORAHS
   3 S WALDORF           1.65   800 AM  5/16  COCORAHS
   4 SSE WALDORF         1.25   700 AM  5/16  COCORAHS

...FREDERICK COUNTY...
   4 SSW FREDERICK       3.96   700 AM  5/16  COCORAHS
   3 NNW NEW MARKET      3.49   900 AM  5/16  COCORAHS
   1 SSE THURMONT        3.36   700 AM  5/16  COCORAHS
   2 SE EMMITSBURG       3.33   715 AM  5/16  CO-OP OBSERVER
   1 E WALKERSVILLE      2.95   700 AM  5/16  COCORAHS
   2 NW NEW MARKET       2.45   500 AM  5/16  TRAINED SPOTTER

...HARFORD COUNTY...
   2 SSE FOREST HILL     1.09   800 AM  5/16  COCORAHS

...HOWARD COUNTY...
   1 SE CLARKSVILLE      2.38   800 AM  5/16  COCORAHS
   3 NW COLUMBIA         2.06   730 AM  5/16  COCORAHS
   3 SW MARRIOTTSVILLE   2.01   930 AM  5/16  COCORAHS
   1 SE MARRIOTTSVILLE   1.72   800 AM  5/16  COCORAHS
   3 SW ELKRIDGE         1.72   800 AM  5/16  COCORAHS
   1 E COLUMBIA          1.66   700 AM  5/16  COCORAHS
   2 SSE SYKESVILLE      1.60   700 AM  5/16  COCORAHS
   2 N COLUMBIA          1.51   700 AM  5/16  COCORAHS
   2 W ELKRIDGE          1.35   700 AM  5/16  COCORAHS
   2 ESE NORTH LAUREL    1.23   640 AM  5/16  COCORAHS
   4 SSE ELLICOTT CITY   1.22   700 AM  5/16  COCORAHS

...MONTGOMERY COUNTY...
   1 WNW BOYDS           3.77   655 AM  5/16  COCORAHS
   SE POOLESVILLE        3.70   800 AM  5/16  COCORAHS
   5 NNW SILVER SPRING   3.66   730 AM  5/16  COCORAHS
   2 WNW BETHESDA        3.38   700 AM  5/16  COCORAHS
   5 NNE GERMANTOWN      3.32   600 AM  5/16  COCORAHS
   3 NE GAITHERSBURG     3.24   700 AM  5/16  COCORAHS
   2 W COLESVILLE        2.92   700 AM  5/16  COCORAHS
   6 N SILVER SPRING     2.88   700 AM  5/16  COCORAHS
   7 N SILVER SPRING     2.83   700 AM  5/16  COCORAHS
   1 ESE NORBECK         2.40   700 AM  5/16  COCORAHS
   BRIGHTON DAM          2.34   900 AM  5/16  CO-OP OBSERVER
   5 NNW SILVER SPRING   2.21   700 AM  5/16  COCORAHS
   1 NNW TAKOMA PARK     2.12   700 AM  5/16  COCORAHS
   1 ESE ROSSMOOR        2.08   635 AM  5/16  COCORAHS
   8 N GAITHERSBURG      2.00   900 AM  5/16  COCORAHS
   2 SSE SILVER SPRING   1.63   600 AM  5/16  COCORAHS
   6 NW SILVER SPRING    1.09   500 AM  5/16  COCORAHS
   1 ENE OLNEY           1.04   450 AM  5/16  COCORAHS

...PRINCE GEORGES COUNTY...
   2 WSW FORT WASHINGTO  2.44   700 AM  5/16  COCORAHS
   1 NE COLLEGE PARK     2.41   845 AM  5/16  COCORAHS
   2 NW LANHAM-SEABROOK  1.91   800 AM  5/16  COCORAHS
   1 SE OXON HILL        1.85   700 AM  5/16  CO-OP OBSERVER
   1 W OXON HILL         1.85   700 AM  5/16  COCORAHS
   2 SE SUITLAND         1.61   700 AM  5/16  COCORAHS
   ESE CAMP SPRINGS      1.51   700 AM  5/16  COCORAHS

...WASHINGTON COUNTY...
   3 NNE SMITHSBURG      4.12   700 AM  5/16  COCORAHS
   5 S SHARPSBURG        3.97   700 AM  5/16  CO-OP OBSERVER
   1 ENE HAGERSTOWN      3.80   700 AM  5/16  COCORAHS
   WILLIAMSPORT          2.88   600 AM  5/16  CO-OP OBSERVER

VIRGINIA

...ALBEMARLE COUNTY...
   8 W CHARLOTTESVILLE   4.28   700 AM  5/16  COCORAHS
   2 W CHARLOTTESVILLE   4.16   800 AM  5/16  CO-OP OBSERVER
   EARLYSVILLE           3.82   600 AM  5/16  CO-OP OBSERVER
   6 NNW CHARLOTTESVILL  3.82   700 AM  5/16  COCORAHS
   5 ESE AFTON           3.52   626 AM  5/16  COCORAHS
   3 NE KESWICK          3.45   700 AM  5/16  COCORAHS

...ARLINGTON COUNTY...
   E ARLINGTON           2.50   710 AM  5/16  COCORAHS

...AUGUSTA COUNTY...
   WAYNESBORO            2.77   700 AM  5/16  CO-OP OBSERVER
   STAUNTON              2.40   800 AM  5/16  CO-OP OBSERVER

...CITY OF FREDERCKSBRG...
   FREDERICKSBURG        2.16   700 AM  5/16  CO-OP OBSERVER

...CITY OF MANASSAS...
   MANASSAS              3.30   730 AM  5/16  CO-OP OBSERVER
   MANASSAS              2.95   700 AM  5/16  CO-OP OBSERVER

...CULPEPER COUNTY...
   3 N RIXEYVILLE        3.95   540 AM  5/16  COCORAHS
   6 NNE RIXEYVILLE      3.78   600 AM  5/16  COCORAHS
   6 N RIXEYVILLE        3.21   730 AM  5/16  COCORAHS

...FAIRFAX COUNTY...
   E OAKTON              4.16   900 AM  5/16  COCORAHS
   2 SSW RESTON          3.74   700 AM  5/16  COCORAHS
   1 W VIENNA            3.69   800 AM  5/16  COCORAHS
   2 S MCLEAN            3.61   700 AM  5/16  COCORAHS
   2 W FALLS CHURCH      3.29   700 AM  5/16  COCORAHS
   3 N VIENNA            3.24   800 AM  5/16  COCORAHS
   VIENNA                3.15   700 AM  5/16  CO-OP OBSERVER
   1 NE LORTON           3.10   600 AM  5/16  COCORAHS
   1 S VIENNA            2.92   700 AM  5/16  COCORAHS
   2 SE MCLEAN           2.84   700 AM  5/16  COCORAHS
   4 ENE FAIRFAX         2.74   800 AM  5/16  COCORAHS
   2 SSE MCLEAN          2.68   700 AM  5/16  COCORAHS
   6 SSW ALEXANDRIA      2.50   700 AM  5/16  COCORAHS

...FAUQUIER COUNTY...
   1 ESE BEALETON        2.76   500 AM  5/16  TRAINED SPOTTER
   4 ENE REMINGTON       2.73   500 AM  5/16  COCORAHS
   3 SSW BROAD RUN       2.67   800 AM  5/16  COCORAHS
   6 SSE WARRENTON       2.49   745 AM  5/16  COCORAHS
   6 S WARRENTON         2.35   600 AM  5/16  COCORAHS
   3 SE WARRENTON        2.32   800 AM  5/16  CO-OP OBSERVER

...FREDERICK COUNTY...
   2 E STEPHENS CITY     3.94   700 AM  5/16  COCORAHS
   WINCHESTER            3.33   730 AM  5/16  CO-OP OBSERVER
   5 NE WINCHESTER       3.23   700 AM  5/16  COCORAHS
   SE MIDDLETOWN         3.19   730 AM  5/16  COCORAHS
   9 NW WINCHESTER       2.96   800 AM  5/16  COCORAHS

...GREENE COUNTY...
   2 SE LYDIA            4.05   500 AM  5/16  TRAINED SPOTTER
   2 WNW STANARDSVILLE   4.05   600 AM  5/16  COCORAHS

...HIGHLAND COUNTY...
   7 SSW MONTEREY        2.59   700 AM  5/16  COCORAHS
   1 SW MILL GAP         2.17   600 AM  5/16  CO-OP OBSERVER

...LOUDOUN COUNTY...
   MOUNT WEATHER         3.25   700 AM  5/16  CO-OP OBSERVER
   4 W LEESBURG          3.03   800 AM  5/16  COCORAHS
   3 WSW ROUND HILL      2.84   715 AM  5/16  COCORAHS
   3 NNW DULLES INTERNA  1.72   204 AM  5/16  CO-OP OBSERVER

...MADISON COUNTY...
   7 NNW MADISON         4.00   620 AM  5/16  COCORAHS
   1 S MADISON           3.00   800 AM  5/16  CO-OP OBSERVER
   HAYWOOD               2.78   700 AM  5/16  CO-OP OBSERVER

...NELSON COUNTY...
   12 SW SCOTTSVILLE     3.25   800 AM  5/16  COCORAHS

...ORANGE COUNTY...
   1 SSW ORANGE          4.02   800 AM  5/16  CO-OP OBSERVER
   2 NW SOMERSET         3.15   800 AM  5/16  CO-OP OBSERVER

...PAGE COUNTY...
   1 ESE HONEYVILLE      3.61   530 AM  5/16  TRAINED SPOTTER

...PRINCE WILLIAM COUNTY...
   6 NW WOODBRIDGE       3.80   500 AM  5/16  COCORAHS
   5 SE MANASSAS         3.56   600 AM  5/16  COCORAHS

...RAPPAHANNOCK COUNTY...
   SPERRYVILLE           3.75   500 AM  5/16  CO-OP OBSERVER
   3 W WASHINGTON        3.73   700 AM  5/16  COCORAHS

...ROCKINGHAM COUNTY...
   1 NW HARRISONBURG     2.50   700 AM  5/16  COCORAHS
   7 NW DAYTON           2.12   700 AM  5/16  COCORAHS
   DALE ENTERPRISE       2.10   700 AM  5/16  CO-OP OBSERVER
   1 SSE SINGERS GLEN    2.06   512 AM  5/16  TRAINED SPOTTER

...SHENANDOAH COUNTY...
   2 NE WOODSTOCK        3.15   700 AM  5/16  CO-OP OBSERVER
   EDINBURG              2.87   700 AM  5/16  CO-OP OBSERVER
   4 N STRASBURG         2.84   700 AM  5/16  COCORAHS

...SPOTSYLVANIA COUNTY...
   5 SSW FREDERICKSBURG  2.02   600 AM  5/16  COCORAHS

...STAFFORD COUNTY...
   8 ESE FREDERICKSBURG  2.07   700 AM  5/16  COCORAHS

...WARREN COUNTY...
   FRONT ROYAL           4.00   600 AM  5/16  CO-OP OBSERVER

WEST VIRGINIA

...BERKELEY COUNTY...
   1 W MARTINSBURG       2.70   700 AM  5/16  CO-OP OBSERVER
   4 E MARTINSBURG       2.68   800 AM  5/16  COCORAHS
   2 NW FALLING WATERS   2.45   700 AM  5/16  COCORAHS

...GRANT COUNTY...
   BAYARD                2.28   700 AM  5/16  CO-OP OBSERVER
   2 ESE KLINE GAP       2.15   610 AM  5/16  TRAINED SPOTTER
   3 W PETERSBURG        2.11   700 AM  5/16  CO-OP OBSERVER

...HAMPSHIRE COUNTY...
   1 SW ROMNEY           1.59   700 AM  5/16  CO-OP OBSERVER

...HARDY COUNTY...
   NW RIG                1.89   700 AM  5/16  COCORAHS
   1 SSE MOOREFIELD      1.82   700 AM  5/16  CO-OP OBSERVER

...JEFFERSON COUNTY...
   3 W CHARLES TOWN      3.01   800 AM  5/16  COCORAHS

...MINERAL COUNTY...
   2 SSW KEYSER          1.78   700 AM  5/16  CO-OP OBSERVER

...PENDLETON COUNTY...
   3 NE FORT SEYBERT     2.19   600 AM  5/16  COCORAHS

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D.C. area forecast: Rain, flooding risks into midday; nice weather payback this weekend