WEATHER ALERT: Dangerous Travel Conditions Expected to Develop; Flood Warning Continues for Area

JEFFERSON CO., Pa. (EYT) – A Winter Storm Warning and a Flood Warning remain in effect for Jefferson County and surrounding areas.

Winter Storm Warning
URGENT – WINTER WEATHER MESSAGE
National Weather Service Pittsburgh PA
237 PM EST Fri Jan 12 2018

…DANGEROUS TRAVEL CONDITIONS DEVELOPING THIS AFTERNOON INTO THIS EVENING…

.In the wake of unseasonably warm air and heavy rainfall, an arctic cold front will continue to blast across the area this afternoon. Temperatures will fall sharply from near 60 degrees into the 30s, ultimately falling into the teens by Saturday morning with wind chills near zero. As the colder air moves in, warm air aloft will result in a period of freezing rain. Freezing rain, coupled with standing water, will result in a flash freeze this afternoon and evening. Ice accumulations could be significant enough to damage branches and power lines.

Freezing rain will then transition to a period of sleet before a complete changeover to snow this evening. Snow could be briefly heavy at times overnight. Accumulating snow on top of a sheet of ice will result in extremely dangerous if not impossible driving conditions into Saturday morning.

Tuscarawas-Carroll-Columbiana-Harrison-Jefferson-Beaver-Allegheny-Armstrong-Washington-Hancock-Brooke-Ohio-

Including the cities of New Philadelphia, Dover, Carrollton, Malvern, East Liverpool, Salem, Columbiana, Cadiz, Steubenville, Punxsutawney, Brookville, Aliquippa, Beaver Falls, Ambridge, Monaca, Pittsburgh Metro Area, Kittanning, Ford City, Washington, Canonsburg, Weirton, Follansbee, Wellsburg, and Wheeling
237 PM EST Fri Jan 12 2018

…WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST SATURDAY…

* WHAT…Heavy mixed precipitation expected, with freezing rain beginning late this afternoon, changing to sleet and eventually all snow after 9 PM. Isolated power outages and tree damage are likely due to the ice. Travel will be dangerous and nearly impossible. Ice accumulations of one tenth to two tenths of an
inch are possible, with 3 to locally 6 inches of snow on top.

* WHERE…Portions of southwest, west central and western Pennsylvania, east central Ohio and northern and northern panhandle of West Virginia.

* WHEN…Until 10 AM EST Saturday.

* ADDITIONAL DETAILS…Sharply falling temperatures will result in a flash freeze of any standing water. Roads will quickly become slick and hazardous once temperatures fall below freezing.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Winter Storm Warning means significant amounts of snow, sleet, and ice are expected. This will make travel very hazardous or impossible. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

FLOOD WARNING

Flood Warning
National Weather Service Pittsburgh PA
230 PM EST FRI JAN 12 2018

Mercer PA-Beaver PA-Venango PA-Lawrence PA-Indiana PA-Butler PA-Allegheny PA-Jefferson PA-Westmoreland PA-Armstrong PA-Clarion PA-Forest PA-
230 PM EST FRI JAN 12 2018

The National Weather Service in Pittsburgh has issued a

* Flood Warning for… Rain and Snowmelt in…

Mercer County in northwestern Pennsylvania…
Beaver County in western Pennsylvania…
Venango County in northwestern Pennsylvania…
Lawrence County in western Pennsylvania…
Northwestern Indiana County in west central Pennsylvania…
Butler County in west central Pennsylvania…
Allegheny County in southwestern Pennsylvania…
Western Jefferson County in west-central Pennsylvania…
Northwestern Westmoreland County in southwestern Pennsylvania…
Armstrong County in west-central Pennsylvania…
Clarion County in west-central Pennsylvania…
Forest County in northwestern Pennsylvania…

* Until 530 PM EST.

* At 229 PM EST, county officials reported flooding in several counties in the warned area due to a combination of heavy rain, snow melt, and in some places across northern Pennsylvania and northern West Virginia, ice jams.

FLOODING… Occurring.

ESTIMATED RAINFALL… Up to 3 inches.

ADDITIONAL RAINFALL…Up to 1/2 inch.

Please report flooding by calling 412-262-1988, posting to the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don`t drown. Most flood fatalities occur in vehicles.

FLOOD WARNING
National Weather Service Pittsburgh PA
930 AM EST Fri Jan 12 2018

…The National Weather Service in Pittsburgh has issued a flood warning for the following rivers in Pennsylvania…

Allegheny River At Parker affecting Armstrong and Clarion Counties.

.Widespread moderate rainfall and snow melt have caused significant runoff into the Allegheny river. With the influx of runoff swelling the Allegheny river, ice on the river has begun moving and has created an ice jam near West Monterrey downstream of Parker.

The Allegheny river is rising rapidly behind this ice jam and is expected to cause waters to rise above flood stage at Parker. River crests are uncertain so maintain caution and be prepared to move to higher ground.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

SAFETY MESSAGE: Do not drive through flooded areas. The water may be deeper than it appears. Stay tuned to NOAA Weather radio for later developments.

930 AM EST Fri Jan 12 2018

The National Weather Service in Pittsburgh has issued a

* Flood Warning for:
The Allegheny River At Parker.
* From this afternoon until late tonight, or until the warning is canceled.
* At 9:00 AM Friday the stage was 17.5 feet.
* Flood stage is 20.0 feet.
* Minor flooding is forecast.
* Forecast…The river will rise above flood stage by this afternoon and continue to rise to near 21.0 feet by this evening. The river will fall below flood stage by tonight.
* Impact…At 22.0 feet, Several homes on Route 268 flood.

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