Wednesday, March 10, 2004


3/10 SPECIAL MORNING UPDATE:
“Just when you think you have it all under control, you have no idea what is going on.”

- Murphy’s Law

SOME OBSERVATIONS FROM THE AREA:

Philadelphia: Light snow and rain mixed. Temp 38, Dewpoint 36 F
Baltimore: Light snow, Temp 34 F, Dewpoint 34 F
Washington: Cloudy, Temp 37 F, Dewpoint 28 F

WHAT’S GOING ON?

A piece of the southern storm is being left behind as the main system moves east. This piece of ocean-enhanced moisture is interacting with cold air filtering in from a high east of Maine. The air temp and dewpoint at 2,000 feet, which is where snow forms, is just about equal, at roughly 28 F. Below and above 2,000 feet, the dewpoint and temperature separate. That means there is no long term stability to allow the snow to continue for an extended period. So thanks to the warming Atlantic and a cool airmass nearby, we’ve had a brief burst of “ocean effect” snow. The main system will take over, drag remaining moisture out to sea with it. There might be a leftover burst of snow later this evening in Southeast PA as colder air returns.

SO NOW WHAT’S THE FORECAST, WISE GUY?

The earlier call this week has verified… which was to say we expected at least “One snowflake on one crocus somewhere in Baltimore County by Wednesday.” A spotter in the Zone (Hereford, that is) reported snow on her crocuses.

The snow will not last, and SCHOOLS WILL NOT BE CLOSING EARLY. If anything the snow will mix with and change to rain from east to west as the morning progresses. Daytime warming, the influence of mild ocean air and higher sun angle all will conspire to kill the snow. Roads are warm, so expect nothing more than slick spots for the drive home.

However…
Isolated areas in Baltimore, Harford and Cecil Counties may end up with a half inch on cars and grassy areas before it is over.

SO ENJOY THE FINAL FLAKES WHILE THEY LAST… I BELIEVE THIS IS WINTER’S SWAN SONG FOR SNOW.

If you are a Powderhound, might as well hang it up, and check back in November. If you are a Spring-a-ling, there is lots of fun on the way… rapidly fluctuating temperatures, thunderstorms, warm spells, cold blasts, the best March has to deliver.

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