Storm Timing Chart

by KD1LD


distance across

10 miles

20 miles

30 miles

40 miles

50 miles

60 miles

70 miles

80 miles

90 miles

100 miles

110 miles

120 miles

130 miles

140 miles

150 miles

25 mph

0:24

0:48

1:12

1:36

2:00

2:24

2:48

3:12

3:36

4:00

4:24

4:48

5:12

5:36

6:00

30 mph

0:20

0:40

1:00

1:20

1:40

2:00

2:20

2:40

3:00

3:20

3:40

4:00

4:20

4:40

5:00

35 mph

0:17

0:34

0:51

1:09

1:26

1:43

2:00

2:17

2:34

2:51

3:09

3:26

3:43

4:00

4:17

40 mph

0:15

0:30

0:45

1:00

1:15

1:30

1:45

2:00

2:15

2:30

2:45

3:00

3:15

3:30

3:45

45 mph

0:13

0:26

0:39

0:52

1:06

1:19

1:33

1:46

2:00

2:13

2:26

2:40

2:53

3:06

3:19

50 mph

0:12

0:24

0:36

0:48

1:00

1:12

1:24

1:36

1:48

2:00

2:12

2:24

2:36

2:48

3:00

55 mph

0:11

0:22

0:33

0:44

0:56

1:05

1:16

1:27

1:38

1:49

2:00

2:11

2:22

2:33

2:44

60 mph

0:10

0:20

0:30

0:40

0:50

1:00

1:10

1:20

1:30

1:40

1:50

2:00

2:10

2:20

2:30

If a storm is moving at 60 mph, it would take 1 minute to go 1 mile.

If a storm is moving at 30 mph, it would take 2 minute to go 1 mile. (one half mile per minute)

If the ch 3 live radar is 10 minute old, and the storm is moving at 30 mph, that would mean the radar map is 5 miles behind the storm.