A097404 Minimum wind speed in statute miles per hour for Beaufort Number n.

0, 1, 5, 8, 13, 20, 25, 32, 39, 47, 55, 64, 74, 83, 93, 104, 115, 126

Offset

0,3

Comments

See the main entry (A097403) for more details. One statute mile is 5280 feet. The first thirteen terms here are derived directly (by me) by converting the corresponding terms of A097403 from knots to statute miles per hour (rounding to the nearest mph). (Whether I use 6076.115, 6080, or 6080.20 feet per nautical mile, makes no difference in the results of my conversions.) The remaining five terms are taken directly from Webster's Third (W3) since I do not currently have all the corresponding terms for A097403. (W3 also indicates that Beaufort Number 17 has an upper limit of 136 mph.) There are discrepancies among my sources for a(2), a(4), a(5) and a(12). Notably, a Merriam-Webster Dictionary says in a footnote that the U.S. uses a(12)=74 for hurricane -- but both it and W3 list 73 in their main tables (so, presumably, those tables are UK- or internationally-oriented). Both dictionaries give a(2)=4 and a(5)=19.

Links

Table of n, a(n) for n=0..17.

Met Office, The Beaufort Scale.

National Weather Service - Chicago, The Beaufort Wind Scale (or who put wind speeds in the Admiral's force scale?).

R. Rowlett, Beaufort Scales (Wind Speed).

Example

a(8) = 39 because Beaufort Number 8 (Wind Force 8 of the Beaufort Scale, a gale) corresponds to 39 mph up to a(9)-1 = 46 mph of wind speed.

Crossrefs

Cf. A097403 (same, in knots (main entry)).

Sequence in context: A314459 A314460 A314461 * A020687 A035423 A314462

Adjacent sequences: A097401 A097402 A097403 * A097405 A097406 A097407

Keyword

fini,full,nonn

Author

Rick L. Shepherd, Aug 14 2004

Status

approved