On this date in weather history - December 21st

Published On: Dec 21 2012 05:11:43 PM EST   Updated On: Dec 27 2012 04:35:02 PM EST
MIAMI -

On this date, a temperature inversion is when the atmosphere near the surface actually rises with height. This type of atmosphere can be very stable and hampers vertical motion. On this date in 1994, a strong temperature inversion occurred over Chicago, trapping carbon monoxide in the pollouted air below the inversion. This resulted in 5,000 false alarms from carbon monoxide detectors.  

FRIDAY'S WEATHER EXTREMES:
   HIGHEST TEMPERATURE (DEGREES F).........................75 Key West, Fla.
   HIGHEST HEAT INDEX (DEGREES F).......................... ,
   LOWEST TEMPERATURE (DEGREES F)..........................-27 Kremmling, Colo.
   LOWEST WIND CHILL (DEGREES F)...........................-59 Fairbanks, Alaska
   HIGHEST WIND GUST (MPH).................................124 Mt. Washington, N.H.
   HIGHEST PRECIPITATION (INCHES)..........................2.52 Mt. Pocono, Pa.