Winter storm feb 25 26 2010
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Winter Storm Feb 25/26, 2010 PowerPoint PPT Presentation


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Winter Storm Feb 25/26, 2010. Dave Ondrejik National Weather Service State College, PA. Current Watches. Why does the Watch area look odd? That is due to the amount of moisture available with this storm. About the system. A very complex low pressure system.

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Winter Storm Feb 25/26, 2010

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Winter storm feb 25 26 2010

Winter Storm Feb 25/26, 2010

Dave Ondrejik

National Weather Service

State College, PA


Current watches

Current Watches


Why does the watch area look odd that is due to the amount of moisture available with this storm

Why does the Watch area look odd?That is due to the amount of moisture available with this storm


About the system

About the system

  • A very complex low pressure system.

  • Forecast track still holds some uncertainty

    • Therefore, snowfall forecasts could change from what will be shown later in presentation.

    • Proximity to east coast and potential for system to move WESTWARD hold keys to track and snowfall amounts.

  • Winds will be strong towards the end of the storm.

    • Wind gusts of 35-45 mph are possible, slightly higher along the mountain tops.

  • Long duration storm…after main snow ends, we still expect snow to fall in parts of western PA into Friday night/Saturday .


Current weather map

Current weather map


Forecast map for wed evening

Forecast map for Wed evening


Forecast map for thursday morning

Forecast map for Thursday morning


Forecast map for thu night

Forecast map for Thu night


Winter storm feb 25 26 2010

Beginning time for snowfall. Snow should start overnight tonight.Below are snow totals for rush hour Thu morning.


Winter storm feb 25 26 2010

Snowfall forecast from 7am Wed-7am Fri (48 hrs)Note: Snow will not begin to fall until late tonight/early Thu am.


Snowfall forecast for entire event

Snowfall Forecast for entire event.


Ice on lake erie note open water in western portion of lake will enhance snowfall amounts

Ice on Lake ErieNote: Open water in western portion of lake will “enhance” snowfall amounts.

Open water – adding

moisture to atmosphere,

thus higher amounts of snow

are forecast in northwest PA

and Laurel Highlands

City of Erie

and Presque Isle


Wind gust forecast

Wind Gust forecast

  • Winds will be gusty especially in the higher terrain.

    • Strongest winds will occur from 4-6 pm Thursday night and continue until about noon on Friday.

  • Remember wind gusts for 40-45 mph are possible.

  • Blowing and drifting snow is quite likely.


Wind gust forecast1

Wind Gust Forecast

7 pm Thu

4 pm Thu

10 pm Thu

1 am Fri


Wind gust forecast2

Wind Gust Forecast

4 am Fri

10 am Fri

1 pm Fri

4 pm Fri


Snow storm feb 25 26 2010 summary

Snow storm – Feb 25-26, 2010(Summary)

  • Heavy snow is expected over most of PA.

    • Exception is south-central PA where less moisture is available.

  • Strong winds are expected with this storm

    • Blowing and drifting snow is possible.

    • Heavy and wet snow, combined with strong winds could cause trees and power lines to come down.

  • Although the main snow will fall between Thu afternoon and early Friday…light and persistent snow will continue in parts of PA into Saturday.


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