Weather Alerts for Illinois

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Current Alerts for Harvey, IL: Flood Warning

1. Flood Advisory for: La Salle

2. Flood Advisory for: La Salle

3. Flood Advisory for: Lee

4. Flood Advisory for: Winnebago

5. Flood Advisory for: Winnebago

6. Flood Warning for: Adams

7. Flood Warning for: Adams

8. Flood Warning for: Adams

9. Flood Warning for: Alexander

10. Flood Warning for: Alexander; Jackson; Union

11. Flood Warning for: Alexander; Pulaski

12. Flood Warning for: Brown; Cass; Morgan; Schuyler

13. Flood Warning for: Bureau; La Salle; Putnam

14. Flood Warning for: Calhoun

15. Flood Warning for: Calhoun

16. Flood Warning for: Calhoun; Greene; Jersey

17. Flood Warning for: Cass; Fulton; Mason

18. Flood Warning for: Clark; Crawford

19. Flood Warning for: Cook

20. Flood Warning for: Crawford; Lawrence

21. Flood Warning for: Crawford; Lawrence

22. Flood Warning for: Edwards; Gallatin; Wabash; White

23. Flood Warning for: Gallatin; Hardin

24. Flood Warning for: Gallatin; Wabash; White

25. Flood Warning for: Gallatin; Wayne; White

26. Flood Warning for: Hancock

27. Flood Warning for: Hancock

28. Flood Warning for: Hancock; Henderson

29. Flood Warning for: Hardin; Pope

30. Flood Warning for: Henderson

31. Flood Warning for: Henderson; Mercer

32. Flood Warning for: Henry; Rock Island

33. Flood Warning for: Henry; Rock Island; Whiteside

34. Flood Warning for: Jackson

35. Flood Warning for: Jackson; Randolph

36. Flood Warning for: Jersey

37. Flood Warning for: Jo Daviess

38. Flood Warning for: Kane; Kendall

39. Flood Warning for: Kane; McHenry

40. Flood Warning for: Lake

41. Flood Warning for: Lake

42. Flood Warning for: Lake

43. Flood Warning for: Madison

44. Flood Warning for: Massac; Pope

45. Flood Warning for: Mercer

46. Flood Warning for: Mercer; Rock Island

47. Flood Warning for: Ogle

48. Flood Warning for: Pike

49. Flood Warning for: Pike

50. Flood Warning for: Pike

51. Flood Warning for: Pike; Scott

52. Flood Warning for: Pope

53. Flood Warning for: Pulaski

54. Flood Warning for: Rock Island

55. Flood Warning for: Rock Island

56. Flood Warning for: Rock Island; Whiteside

57. Flood Warning for: Wabash

58. Flood Warning for: Wabash

59. Flood Warning for: Whiteside

60. Flood Warning for: Winnebago

61. Flood Warning for: Winnebago

62. Flood Warning for: Winnebago

63. Flood Watch for: Carroll; Whiteside

64. Flood Watch for: Jo Daviess

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet