Weather Alerts for Pennsylvania

Recent Locations: Providence, RI Springfield, MO Allentown, PA

1. Cold Weather Advisory for: Huntingdon; Fulton

2. Cold Weather Advisory for: Mifflin; Juniata; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster

3. Extreme Cold Warning for: Carbon; Monroe

4. Extreme Cold Warning for: Clearfield; Northern Centre; Cambria; Blair; Somerset; Bedford

5. Extreme Cold Warning for: Mercer; Venango; Forest; Butler; Clarion; Jefferson; Armstrong; Westmoreland Ridges; Fayette Ridges; Indiana; Higher Elevations of Indiana; Eastern Preston

6. Extreme Cold Warning for: Northern Clinton; Northern Lycoming; Sullivan

7. Extreme Cold Warning for: Northern Erie; Southern Erie; Crawford

8. Extreme Cold Warning for: Southern Centre

9. Extreme Cold Warning for: Southern Clinton; Southern Lycoming

10. Extreme Cold Warning for: Warren; McKean; Potter; Elk; Cameron; Tioga

11. Wind Advisory for: Carbon; Monroe

12. Wind Advisory for: Clearfield; Northern Centre; Cambria; Blair; Somerset; Bedford

13. Wind Advisory for: Huntingdon; Fulton

14. Wind Advisory for: Mifflin; Juniata; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster

15. Wind Advisory for: Northern Clinton; Northern Lycoming; Sullivan

16. Wind Advisory for: Southern Centre

17. Wind Advisory for: Southern Clinton; Southern Lycoming

18. Winter Weather Advisory for: Cambria; Somerset

19. Winter Weather Advisory for: Northern Erie; Crawford

20. Winter Weather Advisory for: Southern Erie

21. Winter Weather Advisory for: Westmoreland Ridges; Fayette Ridges; Higher Elevations of Indiana; Ridges of Eastern Monongalia and Northwestern Preston; Preston

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds

Weather Topic: What are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds