Fog develop across northeast Iowa and reduced the visibility to less than mile for an extended period starting on the 29th and continuing through much of the 30th. The fog lingered well into the 31st along the Mississippi River. During this period, an extended period of dense fog with visibilities of a quarter mile or less occurred. As an area of low pressure moved across the Midwest, warm air spread over the region and caused the deep snow pack to begin melting which resulted in the formation of the fog.

Dense Fog in HOWARD, IOWA
From 29-DEC-10 11:30:00 to 30-DEC-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less from the mid morning into the late afternoon of the 30th.

Dense Fog in MITCHELL, IOWA
From 29-DEC-10 10:45:00 to 30-DEC-10 19:45:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was a quarter of a mile or less from the mid afternoon of the 29th into the evening of the 30th.

Dense Fog in WINNESHIEK, IOWA
From 29-DEC-10 10:15:00 to 30-DEC-10 21:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather observing equipment at the Decorah airport reported a visibility in fog of a mile or less from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less from the mid morning into the late afternoon of the 30th.

Dense Fog in CLAYTON, IOWA
From 29-DEC-10 11:00:00 to 31-DEC-10 18:45:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 31st. During this period, the visibility was reduced to a quarter of a mile or less from the early morning of the 30th into the early morning of the 31st.

Dense Fog in FAYETTE, IOWA
From 29-DEC-10 11:00:00 to 30-DEC-10 19:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less during the morning of the 29th and again from the morning into the evening of the 30th.

Dense Fog in FLOYD, IOWA
From 29-DEC-10 09:30:00 to 30-DEC-10 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather observing equipment at the Charles City airport reported a visibility in fog of a mile or less from the morning of the 29th into the evening of the 30th. During this period, the visibility was a quarter of a mile or less from the mid afternoon of the 29th into the evening of the 30th.

Dense Fog in ALLAMAKEE, IOWA
From 29-DEC-10 13:30:00 to 31-DEC-10 18:45:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 31st. During this period, the visibility was reduced to a quarter of a mile or less from the early morning of the 30th into the early morning of the 31st.

Dense Fog in CHICKASAW, IOWA
From 29-DEC-10 11:00:00 to 30-DEC-10 19:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less during the morning of the 29th and again from the morning into the evening of the 30th.