Widespread dense fog with visibilities frequently 1/4 mile or less occurred during the night and much of the morning on November 21, 2012. The fog was the result of weak high pressure bringing clear skies and light winds, but low level moisture was plentiful to help create the fog.  As the high pushed off to the east of the area increasing south winds helped to dissipate the fog by noon. Flights were cancelled and travel by vehicle was slowed or delayed which disrupted many plans being this was the day before Thanksgiving.

Dense Fog in IOWA, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in JACKSON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in JEFFERSON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 07:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in JOHNSON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:52:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dense Fog in JONES, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 08:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in KEOKUK, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 08:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in LEE, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 11:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in LINN, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:25:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dense Fog in SCOTT, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 11:06:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dense Fog in WASHINGTON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in VAN BUREN, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 07:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in LOUISA, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in MUSCATINE, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in BENTON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 05:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in DELAWARE, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in DUBUQUE, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dense Fog in BUCHANAN, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 11:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in CEDAR, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:50:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in CLINTON, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 11:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Dense Fog in DES MOINES, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 11:10:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dense Fog in HENRY, IOWA
From 21-NOV-12 00:00:00 to 21-NOV-12 09:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS