Pocket weather

from the 1998 International Marine Daybook and Nautical Desk Reference
 
Wind Direction Barometer
Reading		 Barometer
Movement		 Weather Outlook
mbar inches
SW to NW 1023 30.2 Steady Continuing fair. Temperature remaining steady.
SW to NW 1023 30.2 Slow fall Temperature rising slowly. Fair for 48 hours.
SW to NW 1019 to 1023 30.1 to 30.2 Steady Stable temperature, remaining fair for 24 to 48 hours.
SW to NW 1019 to 1023 30.1 to 30.2 Rapid rise Continuing fair but increasingly cloudy. Rain and cooler within 48 hours.
SE to S 1019 to 1023 30.1 to 30.2 Slow fall Rain and warmer within 24 hours.
SE to S 1019 to 1023 30.1 to 30.2 Rapid fall Wind and rain increasing within 12 to 18 hours.
E to S 1009 or less 29.8 or less Rapid fall Severe storm imminent, clearing within 24 hours. Winter: dropping temperatures.
NE to E 1019 and higher 30.1 and higher Slow fall Summer: light winds, rain within three days. Winter: rain within 24 hours. Slightly warmer.
NE to E 1019 and higher 30.1 and higher Rapid fall Summer: rain within 24 hours. Winter: increasing rain or snow within 12 hours.
NE to SE 1019 to 1023 30.1 to 30.2 Slow fall Wind and rain increasing within 12 to 18 hours.
NE to SE 1019 to 1023 30.1 to 30.2 Rapid fall Wind and rain increasing within 12 hours.
NE to SE 1016 and less 30.0 and less Slow fall Extended period of rain 1 to 3 days or more.
NE to SE 1016 and less 30.0 and less Rapid fall Strong winds and rain imminent. Clearing and cooling within 36 hours.
N to E 1009 and less 29.8 and less Rapid fall Northeast gale and heavy rain imminent. Winter: Snow and extended colder weather.
S to SW 1016 and less 30.0 and less Slow rise Clearing within a few hours. Fair weather for several days.

A rapid rise or fall is one in which barometric pressure changes at a rate of 1 millibar or 0.03 inches every three hours or less.

Wind Chill

Wind Chill (°F) = 35.74 + 0.6215T - 35.75*(V0.16) + 0.4275*T*(V0.16)

Where T=Air Temperature (°F) V=Wind Speed (mph) at standard 33 ft. Wind speed at 5 ft. (face level) is approximately (2/3 * V)