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Feb. 26 Storm DISC+OBS


Ellinwood

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URGENT - WINTER WEATHER MESSAGENATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC512 PM EST WED FEB 25 2015DCZ001-MDZ013-014-016-018-VAZ038-039-051>055-502-260615-/O.CON.KLWX.WW.Y.0017.150226T0500Z-150226T1700Z/DISTRICT OF COLUMBIA-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-CALVERT-GREENE-MADISON-CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SOUTHERN FAUQUIER-INCLUDING THE CITIES OF...WASHINGTON...ANNAPOLIS...WALDORF...CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...FALLS CHURCH512 PM EST WED FEB 25 2015...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHTTONIGHT TO NOON EST THURSDAY...* LOCATIONS...WASHINGTON DC AND ITS MARYLAND AND VIRGINIA  SUBURBS.* HAZARD TYPES...SNOW.* SNOW ACCUMULATIONS...1 TO 2 INCHES...2 TO 4 INCHES FOR CHARLES  AND CALVERT COUNTIES.* TIMING...DEVELOPING AFTER MIDNIGHT AND CONTINUING THROUGH  THURSDAY MORNING. SNOW IS EXPECTED TO BE HEAVIEST DURING THE 3  AM TO 8 AM.

I sorta feel honored that the NWS finds my area's special wx statement for 1-2" is as urgent as St. Mary's County's statement for 4-6"

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Just keeping track for DC..hopefully GFS/RGEM moisten at 18z so consensus improves even more...right now looks like a 2" snowfall...maybe a tad more.

 

12zGFS - 0.15"

18z NAM - 0.22"

18z Hi res - 0.27"

15z SREF - 0.27"

12z Euro - 0.24"

12z GGEM - 0.12"

12z UKMET - 0.20"

12z RGEM - 0.09"

 

18zGFS - 0.14"

18z NAM - 0.22"

18z Hi res - 0.27"

15z SREF - 0.27"

12z Euro - 0.24"

12z GGEM - 0.12"

12z UKMET - 0.20"

18z RGEM - 0.08"

21z RAP (why not) - 0.23" - through 10am

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Euro/NAM rule. Revised my call from 1-2" to 1-3". I think GFS is too dry on northern edge.

 

just looked at text and even the GFS gives DCA 0.14" which would be good enough for 1.5"+ for me and you...no model gives us less than 1"...several give us 2-3" so I like your call...If we toss the RGEM/4kNAM/SREF/RAP, we come up with an average of 0.18" making 2" a nice midpoint...1-3" is kind of a no-brainer at this point for me and you....

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