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March 5th Storm Obs/Nowcasting


nj2va

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Latest RAP has the final decent bands rotating west to east from 5 - 6pm.  The good stuff should be over around 6 for DC, a little later south and east.  Maybe some --SN after 6pm for DC...hopefully it is delayed a bit...but enjoy the good stuff now...don't wait to get out in it...the best is probably over the next 2-3 hours

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SHORT TERM FORECASTNATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC107 PM EST THU MAR 5 2015ANZ535-DCZ001-MDZ013-503-504-VAZ025-026-029-036>040-050>054-501-502-505>508-052000-TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-DISTRICT OF COLUMBIA-PRINCE GEORGES-NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEASTERN MONTGOMERY-AUGUSTA-ROCKINGHAM-PAGE-NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-ORANGE-CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-ARLINGTON/FALLS CHURCH/ALEXANDRIA-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN LOUDOUN-EASTERN LOUDOUN-NORTHERN VA BLUE RIDGE-CENTRAL VA BLUE RIDGE-INCLUDING THE CITIES OF...WASHINGTON...GERMANTOWN...DAMASCUS...ROCKVILLE...STAUNTON...WAYNESBORO...HARRISONBURG...CHARLOTTESVILLE...CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...FALLS CHURCH...WARRENTON...PURCELLVILLE...LEESBURG...ASHBURN...BIG MEADOWS...WINTERGREEN107 PM EST THU MAR 5 2015.NOW...A BAND OF HEAVY SNOW WILL IMPACT THE WASHINGTON METROPOLITANAREA...CENTRAL VIRGINIA AND CENTRAL SHENANDOAH VALLEY THROUGH 3 PMTHIS AFTERNOON. VISIBILITY WILL BE REDUCED BELOW ONE-QUARTER MILEAND SNOWFALL RATES UP TO 2 INCHES PER HOUR ARE EXPECTED. PLEASE DONOT TRAVEL ACROSS THESE AREAS IF YOU DO NOT HAVE TO. TRAVELLINGWILL BE EXTREMELY DANGEROUS THIS AFTERNOON. INTERSTATES81...64...66...270...95 AND 495 WILL BE IMPACTED BY THE HEAVYSNOW.
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Just measured: 2.7" Not bad, but not great for 6 hours of steady snow. I'd take it if it did that again for the next 6 hours, but seems like the falling snow is barely beating out the melting. Just came back from sledding and it was definitely slushy next to the ground.

 

There should be a significant push of cold air into DC metro around 3-4pm, but it may coincide with the good firehose diminishing

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There should be a significant push of cold air into DC metro around 3-4pm, but it may coincide with the good firehose diminishing

 

also, re swiscaster...steady snow for 6 hours would basically equal 2.7".  so far, think the 4-8" calls were solid.

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