The Weather Prediction Center

Short Range Forecast Discussion

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Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
331 AM EDT Thu Oct 30 2014

Valid 12Z Thu Oct 30 2014 - 12Z Sat Nov 1 2014

***Major trough setting up over the Eastern U.S.***

***Drought relief on the way for California***

***Arctic surface high settles southward into U.S.***

The cold front that has moved offshore from the East Coast has
delivered a cooler and more fall-like airmass to the Eastern U.S.,
and this cooler weather is expected to continue through Halloween.
 Things will get more interesting as we head into the weekend as a
Manitoba mauler (an upper level low coming from the Canadian
province of Manitoba) dives southward towards the southern
Appalachians by Saturday morning.  This will result in the
development of a highly amplified trough over the East Coast and a
strong surface low developing offshore.  In terms of sensible
weather impacts, expect much colder weather by Saturday with
numerous showers, and snow in the higher elevations of the
Appalachians.

Across the western U.S., good news is in the forecast for much of
California as a more southern storm track brings badly needed rain
to drought-stricken areas.  The rain will come courtesy of a
Pacific cold front.  A period of steady rainfall along with
isolated thunderstorms is likely for central and northern
California on Friday.  Snow is likely for the highest elevations
of the Sierra Nevada, where winter storm watches are currently in
effect.  Showers are also expected over the Pacific Northwest.

Elsewhere across the country, a large surface high from Canada
will settle southward into the central U.S. to close out the week,
with cold and dry conditions expected.  Dry and pleasant weather
is expected for the Desert Southwest.

Hamrick



Graphics available at www.wpc.ncep.noaa.gov




Last Updated: 331 AM EDT Thu Oct 30 2014