From the ABC 7 Weather team

Record lows chill Dakotas; D.C. weather fall-like

September 23, 2012 - 07:27 PM
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Think it’s chilly in the nation’s capital? Cold snap hit other parts of the U.S. with a vengeance this morning.

Autumn arrived on schedule across much of the U.S. this weekend. The equinox rang in at 10:49 a.m. Saturday and Mother Nature decided to chill things off just in time Sunday morning. Now, the cool blast has settled into the nation’s capital but not for too long.

A sprawling Canadian high pressure swooped in behind a cold front to bring record lows to the Dakotas! Check out some of the temperatures from Sunday morning below:

LOWTEMPS

Now, a chunk of that autumn chill is moving into the Ohio Valley. Lows will drop into the 30s and a few areas could see frosty weather tomorrow morning. Locally, temperatures could dip just enough to see the freezing mark briefly in the Allegheny Mountains where a Frost Advisory is in effect for Garrett County.

frost

When is frost most likely during the fall season inside the Capital Beltway?  Well, it won't happen with this cold blast but check out my blog from earlier in the week to find out when it's most likely according to climatology.

Food for thought:
- The last time the temperature dipped to 39 degrees at Reagan Nat’l was March 27th.
- The last time the temperature bottomed out at freezing was March 6th.
- Temperatures didn’t fall below freezing at Reagan National last fall; it took until December 11th.

High pressure builds overhead Monday and Monday night across the Mid-Atlantic. Clear skies and light wind could allow spotty frost to form in suburbs to the west of Washington like Frederick, Front Royal, Purcellville, Sharpsburg and Smithsburg.

Temperatures will warm up a bit by the middle of the week as southerly winds return.

Stay with ABC7 and WTOP Radio for the latest forecast and have a great week!

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