Skip Navigation Linkswww.weather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service Forecast Office   NWS logo - Click to go to the NWS homepage    
Portland, Oregon
navigation bar decoration    


 
 
Current Warnings
 
 
 
 
 
Current Conditions
 
 
 
 
 
 
 
 
 
Forecasts
 
 
 
 
 
 
 
 
 
Experimental...
 
 
 
Climate...
 
 
 
 
 
Model Data
 
 
 
 
Weather Safety
 
 
 
 
 
Miscellaneous
 
 
 
 
 
 
 
 
Contact Us
 
 
 
Marionberries Pacific Waves Yaquina Lighthouse on Oregon Coast Fall in Oregon
Converting Wind Speeds

Converting Wind Speeds


[ Also, estimating wind speed while on land or wind speed/sea state while at sea ]
[ printable version .pdf ]

Converting Knots (KT) to Miles per Hour (MPH)
(ex. to convert 25 kt, find the 20 on left, then follow across til you intersects column with 5.
That value at the intersection is the miles per hour. So 25 kt is equal to 29 mph.)
MPH 0 kt 1 2 3 4 5 6 7 8 9
0 kt 0 1 2 4 5 6 7 8 9 10
10 12 13 14 15 16 17 18 20 21 22
20 23 24 25 27 28 29 30 31 32 33
30 35 36 37 38 39 40 41 43 44 45
40 46 47 48 50 51 52 53 54 55 56
50 58 59 60 61 62 63 64 66 67 68
60 69 70 71 73 74 75 76 77 78 79
70 81 82 83 84 85 86 88 89 90 91
80 92 93 94 96 97 98 99 100 101 102
90 104 105 106 107 108 109 111 112 113 114
Marine Warnings: Gale Storm Hurricane Force


Converting Miles per Hour (MPH) to Knots (KT)
(ex. to convert 37 mph, find the 30 on left, then follow across til you intersects column with 7.
That value at the intersection is the miles per hour. So 37 mph is equal to 32 kts)
KTs 0 mph 1 2 3 4 5 6 7 8 9
0 mph 0 1 2 3 4 4 5 6 7 8
10 9 10 10 11 12 13 14 15 16 17
20 17 18 19 20 21 22 23 24 24 25
30 26 27 28 29 30 30 31 32 33 34
40 35 36 37 37 38 39 40 41 42 43
50 43 44 45 46 47 48 49 50 50 51
60 52 53 54 55 56 57 57 58 59 60
70 61 62 63 63 64 65 66 67 68 69
80 70 70 71 72 73 74 75 76 77 77
90 78 79 80 81 82 83 83 84 85 86
Marine Warnings: Gale Storm Hurricane Force

Webmaster
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Portland Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089

Tel: (503) 261-9246

Disclaimer
Information Quality
Credits
Glossary
Privacy Policy
Freedom of Information Act
About Us
Career Opportunities

National Weather Service Mission: "The National Weather Service (NWS) provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. NWS data and products form a national information database and infrastructure which can be used by other governmental agencies, the private sector, the public, and the global community."