Snow showers developed during the evening hours of March 3rd and continued through the morning hours of March 4th along and west of the Allegheny Front in the wake of a strong cold front. |A SKYWARN Spotter reported 2 inches of snowfall in Frostburg, MD.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
Snow showers developed during the evening hours of March 3rd and continued through the morning hours of March 4th along and west of the Allegheny Front in the wake of a strong cold front. |A SKYWARN Spotter reported 2 inches of snowfall in Frostburg, MD.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Mar 3, 3:15 PM EST, 4 hours 45 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
315 PM EST SAT MAR 3 2007
.SHORT TERM /TONIGHT THROUGH SUNDAY/...
WATER VAPOR LOOP SHOWS A POSITIVELY TILTED TROUGH ELONGATING FROM
QUEBEC SOUTHWEST THROUGH THE PLAINS. ACARS 400-250MB WIND
OBSERVATIONS REVEAL A 150-195KT SOUTHWESTERLY JET FROM THE PLAINS
THROUGH THE MID ATLANTIC. 11Z SURFACE ANALYSIS PLACED A 993MB
CYCLONE ACROSS THE UPPER GREAT LAKES. A SERIES OF COLD FRONTS EXTEND
FROM THE LOW TO THE SOUTH-SOUTHWEST. THE FIRST WAS DISSIPATING
ACROSS THE APPALACHIANS...WITH THE SECOND COLD FRONT STRETCHED
THROUGH INDIANAPOLIS AND SOUTHERN MISSOURI...AND THE THIRD WAS
ENTERING NORTHWEST ILLINOIS TO NORTHERN KANSAS.
THE 1705Z DESCENT KIAD ACARS SOUNDING INDICATES 4C OF COOLING
BETWEEN 700-500MB SINCE THE 12Z KIAD RAOB. THIS IS IN ASSOCIATION
WITH THE FIRST DECAYING WAVE ALOFT WHICH BROUGHT LIGHT SHOWERS
ACROSS NORTH CENTRAL MARYLAND. IT IS TAKING SEVERAL HOURS TO MIX OUT
SHALLOW COLD POOL BEHIND THE DISSIPATING COLD FRONT STRETCHED
SOUTHWEST TO NORTHEAST...BISECTING THE FORECAST AREA.
THE NEXT COLD FRONT IS MOVING THROUGH WEST VIRGINIA...WITH INCREASED
SHOWER RETURNS EVIDENT AS DESTABILIZATION (FROM THE SURFACE AND
ALOFT) TAKE PLACE. THIS WILL PRESENT A WINDOW OF OPPORTUNITY FOR
SHOWERS AND THUNDERSTORMS TO DEVELOP LATE THIS AFTERNOON AND EARLY
THIS EVENING. 12Z NAM/GFS INDICATE 100-200 J/KG OF INSTABILITY
DURING THE LATE AFTERNOON. EVAPORATIVE COOLING ASSOCIATED WITH THE
INVERTED-V SOUNDING (DOWNDRAFT TEMPERATURES NEAR 45F) SHOULD PROVIDE
A FAVORABLE ENVIRONMENT FOR HIGHER WIND GUSTS WITHIN CONVECTIVE
ELEMENTS. SMALL HAIL WILL BE POSSIBLE...ESPECIALLY ACROSS THE
NORTHWEST FORECAST AREA WHERE EQUILIBRIUM LEVEL TEMPERATURES DROP TO
-25C.
MEANWHILE...COLD ADVECTION WILL BE TAKING PLACE ACROSS THE
MOUNTAINS...WHERE SYNOPTIC CYCLONIC FLOW WILL OCCUR ATOP MOIST
UPSLOPE. 12Z NAM/GFS INDICATE THE MOISTURE DEPTH IS FAIRLY DEEP
(6 KFT)...WITH A GOOD UPSLOPE TRAJECTORY OVERNIGHT. THERE IS A
CLUSTERING AT ABOUT 0.4 LIQUID EQUIVALENT QPF FROM THE 09Z SHORT
RANGE ENSEMBLE MEMBERS AT KEKN THROUGH MID MORNING SUNDAY. GIVEN A
DECENT FLOW ATOP THE BOUNDARY AND THE TROUGH PASSING OVERHEAD...WILL
HAVE SNOW SHOWERS MENTIONED TO THE BLUE RIDGE AND SOME FLURRIES EAST
TO THE INTERSTATE 95 CORRIDOR.
PROXIMITY TO THE MID LEVEL TROUGH ALOFT WILL KEEP CLOUDS ACROSS THE
REGION SUNDAY. ANY CLEAR PATCHES WHICH DEVELOP LATER TONIGHT WILL
FILL IN AS THE BOUNDARY LAYER MIXES DURING THE MORNING. UPSLOPE
MOUNTAIN SNOW SHOWERS WILL BE DECAYING THROUGH THE DAY.
&&
.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
&&
.AVIATION...
SHOWER AND THUNDERSTORM ACTIVITY WILL DEVELOP DURING THE MID TO LATE
AFTERNOON WITH THE ARRIVAL OF THE NEXT SECONDARY COLD FRONT AND WAVE
ALOFT. WINDS WILL SHIFT TO THE NORTHWEST WITH GUSTS CONTINUING
ACROSS MOST TAF SITES INTO SUNDAY.
&&
.MARINE...
12Z ETA/GFS MOS AT THOMAS POINT INDICATE SUSTAINED WINDS WILL
INCREASE FROM 15KT TONIGHT TO 20KT SUNDAY. 12Z NAM/GFS PROXIMITY
FORECAST SOUNDINGS INDICATE WIND GUST POTENTIAL OF 25-30 KNOTS
THROUGH SUNDAY.
&&
.HYDROLOGY...
MAIN STEM FORECAST POINTS ARE ALL UNDER FLOOD STAGE.
&&
.TIDES...
CURRENT TIDAL DEPARTURES ARE A HALF TO ONE FOOT ABOVE ASTRONOMICAL
PREDICTIONS. THE LUNAR CYCLE IS AT A FULL MOON (100 PERCENT FULL).
THE CHESAPEAKE BAY OPERATIONAL FORECAST SYSTEM INDICATES WATER
LEVELS WILL FALL TO NEAR ASTRONOMICAL PREDICTIONS TONIGHT.
&&
.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...SNOW ADVISORY FROM 7 PM THIS EVENING TO 10 AM EST SUNDAY FOR
MDZ501.
VA...SNOW ADVISORY FROM 7 PM THIS EVENING TO 10 AM EST SUNDAY FOR
VAZ021.
WV...SNOW ADVISORY FROM 7 PM THIS EVENING TO 10 AM EST SUNDAY FOR
WVZ054-501-503.
MARINE...SMALL CRAFT ADVISORY UNTIL 10 PM EST SUNDAY FOR ANZ530>537.
&&
SHORT TERM/AVIATION/HYDROLOGY/TIDES...ROGOWSKI
LONG TERM...LISTEMAA
MARINE...ROGOWSKI/LISTEMAAHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 245 PM EST SAT MAR 3 2007 ANZ530>537-DCZ001-MDZ003>007-009>011-013-014-016>018-501-502- VAZ021-025>031-036>042-050>057-WVZ050>055-501>504-041000- CHESAPEAKE BAY NORTH OF POOLES ISLAND MD- CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD- CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD- CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD- CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA- TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD- TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD- TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA- DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-HIGHLAND- AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE- NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN- ORANGE-CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 245 PM EST SAT MAR 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE EASTERN SHORE INCLUDING THE CHESAPEAKE BAY AND EAST OF GARRETT COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA... WASHINGTON DC AND THE TIDAL POTOMAC RIVER. .DAY ONE...TONIGHT A SMALL CRAFT ADVISORY IS IN EFFECT ALONG THE TIDAL POTOMAC RIVER AND MARYLAND PORTION OF THE CHESAPEAKE BAY THROUGH SUNDAY EVENING. SNOW SHOWERS ARE EXPECTED TO INCREASE THIS EVENING ACROSS THE HIGHER ELEVATIONS OF WESTERN MARYLAND AND EASTERN WEST VIRGINIA BEHIND A COLD FRONT. A SNOW ADVISORY HAS BEEN POSTED ALONG AND WEST OF THE ALLEGHENY FRONT...AND FOR THE WESTERN RIDGE LINE OF HIGHLAND AND PENDLETON COUNTIES. PLEASE REFER TO THE SNOW ADVISORY FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY SMALL CRAFT ADVISORY CONDITIONS ARE ONCE AGAIN EXPECTED ALONG THE TIDAL POTOMAC RIVER AND MARYLAND PORTION OF THE CHESAPEAKE BAY SUNDAY NIGHT AHEAD OF THE NEXT COLD FRONT...THROUGH MONDAY NIGHT BEHIND THE COLD FRONT. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS NOT EXPECTED. ANY REPORTS OF SMALL HAIL OR WIND GUSTS WITHIN ANY THUNDERSTORMS THIS AFTERNOON AND EVENING ARE APPRECIATED. SNOW REPORTS ACROSS THE PAN HANDLE OF WEST VIRGINIA AND MARYLAND OVERNIGHT WILL BE APPRECIATED AS WELL. ROGOWSKI/NWL
The national radar mosaic for the moment the first event began.
1 winter weather. Local standard time, as filed.
A SKYWARN Spotter reported 2 inches of snowfall in Frostburg, MD.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2007Every state in 2007This day in weather historyWarnings in Maryland, March 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 18614.