| Stations: |
Precipitation |
| Aberdeen Airport (397 m, South Dakota) |
8.0 mm |
| Barkley Regional Airport (126 m, Kentucky) |
0.3 mm |
| Bethel Airport (44 m, Alaska) |
0.3 mm |
| Billings Logan Intl. Airport (1088 m, Montana) |
4.0 mm |
| Bishop Intl. Airport (233 m, Michigan) |
0.8 mm |
| Blue Grass Airport (301 m, Kentucky) |
2.0 mm |
| Capital Region Intl. Airport (266 m, Michigan) |
0.3 mm |
| Cold Bay Airport (31 m, Alaska) |
5.0 mm |
| Covington Airport (267 m, Kentucky) |
6.0 mm |
| Dayton Intl. Airport (306 m, Ohio) |
2.0 mm |
| Des Moines Intl. Airport (294 m, Iowa) |
0.3 mm |
| Detroit Metropolitan Airport (202 m, Michigan) |
0.8 mm |
| Dillingham Airport (29 m, Alaska) |
0.5 mm |
| Dubuque Regional Airport (329 m, Iowa) |
7.0 mm |
| Duluth Airport (432 m, Minnesota) |
2.0 mm |
| Erie Intl. Airport (225 m, Pennsylvania) |
0.3 mm |
| Fort Wayne Intl. Airport (252 m, Indiana) |
2.0 mm |
| Gerald R. Ford Intl. Airport (245 m, Michigan) |
0.8 mm |
| Great Falls (1131 m, Montana) |
0.3 mm |
| Hector Intl. Airport (274 m, North Dakota) |
12.0 mm |
| Helena Regional Airport (1188 m, Montana) |
0.3 mm |
| Huron Airport (393 m, South Dakota) |
6.0 mm |
| John Glenn Columbus Intl. Airport (258 m, Ohio) |
0.3 mm |
| Kodiak Airport (34 m, Alaska) |
7.0 mm |
| Louisville Intl. Airport (149 m, Kentucky) |
9.0 mm |
| Dane County Regional Airport (264 m, Wisconsin) |
2.0 mm |
| Milwaukee Mitchell Intl. Airport (211 m, Wisconsin) |
0.5 mm |
| Minneapolis (255 m, Minnesota) |
8.0 mm |
| Muskegon (193 m, Michigan) |
5.0 mm |
| Nashville Intl. Airport (180 m, Tennessee) |
0.3 mm |
| Nome Airport (6 m, Alaska) |
0.8 mm |
| Raleigh (766 m, West-Virginia) |
0.5 mm |
| Ralph Wien Memorial Airport (5 m, Alaska) |
0.3 mm |
| Rochester Intl. Airport (402 m, Minnesota) |
1.0 mm |
| Sheridan Airport (1209 m, Wyoming) |
11.0 mm |
| Toledo Express Airport (211 m, Ohio) |
1.0 mm |
| Waterloo Regional Airport (268 m, Iowa) |
0.5 mm |
| Yeager Airport (299 m, West-Virginia) |
0.3 mm |
North - South