Valley Fog

Early Thursday morning the sky was clear and river valleys had some thick fog. The sky was clear and as the sun came up we were able to see the fog on a visible satellite image from GOES16.



Posted under Fog, GOES

This post was written by Schnack on August 30, 2018

Smoke and Fog

The clouds over Iowa may pop a stray shower or storm this afternoon. The smoke to our west is not moving much. The smoke in Minnesota is moving south. Expect a smoky sky through the weekend. Smoke is from wildfires in western Canada.

Areas of fog this morning in eastern Iowa.


Posted under Fire, Fog, GOES

This post was written by Schnack on August 10, 2018

Freezing Rain, Dense Fog and Rain Tonight

There is a wide range of weather across eastern Iowa tonight and into Tuesday morning.

Here is a look at the road temperatures this evening. The temperatures in central Iowa are dropping. Watch out for slick conditions on elevated surfaces. They will freeze faster.

Northwest of a line from Tama to Elkader tonight and Tuesday:
Areas of fog will thin out as freezing rain develops after midnight. The freezing rain tapers off around 9 AM Tuesday. Ice accumulation will be 0.10-0.25”. Use caution walking and driving Tuesday morning due to the ice. Highs Tuesday remain below freezing so ice will not melt much.

Southeast of a line from Tama to Elkader tonight and Tuesday:
Areas of dense fog is expected through the night and into Tuesday morning. Rain becomes widespread after midnight. Temperatures are in the mid 30s, so no freezing rain is expected. Fog thins Tuesday morning with more rain possible until early afternoon. Highs are near 40 degrees.

Here is the timing of the rain/freezing rain tonight and Tuesday morning.

For all of eastern Iowa…
Tuesday night the wind increases from the northwest at 10-20 mph under a mostly cloudy sky. The sun comes back out Wednesday with highs in the 20s.

We are tracking some more active weather for Thursday through Saturday with scattered rain/snow chances each day.


Posted under Fog, Ice, Update, Winter Weather

This post was written by Schnack on February 19, 2018

Foggy Days

It has been a foggy start to the week with areas of dense fog both Monday and Tuesday. Here is what the fog looked like in Dubuque earlier on Tuesday.


A DENSE FOG ADVISORY is in effect for northeast Iowa until midnight tonight. In the advisory area, visibility will be reduced to a quarter of a mile or less.


The charts below show the amount of days, in 2017 (red), fog was reported at Waterloo, Dubuque, Cedar Rapids and Iowa City. These numbers are compared the average number of days (blue) each month fog is reported. December is typically the month with the most days fog is reported.

Click on the image below to enlarge.


Posted under Fog

This post was written by Schnack on November 14, 2017

Wednesday Morning Fog

Here is a look at smoke and fog from early Wednesday morning.

Here is a view from our Storm Track 7 Live Weather Network camera in Dubuque this morning showing the fog.


Posted under Fog

This post was written by Schnack on September 13, 2017

Cloudy Weather Continues Monday

It doesn’t look like March will end on a bright note…but rather a cloudy and potentially wet one, instead. Most of the week will be partly sunny at best, with completely overcast skies more likely than not. A few light rain showers or areas of pesky drizzle are likely through the day today. Highs today: 47-56. Fog is possible again overnight into Tuesday morning.

Tuesday will be one of the mildest days of the week, with partly sunny to mostly cloudy skies. It should stay dry tomorrow with highs in the low to mid 50s.

Rain tracks back into eastern Iowa Wednesday and brings breezy winds with it. Rain chances and breezy conditions continue from midweek to the end of the week on Friday. Highs during that time range from the mid-40s to the mid-50s.

This is no joke, but April Fool’s Day on Saturday looks like one of the – if not the nicest – day of the week. A few 60s are possible as highs, with partly cloudy skies. Clouds and showers return on Sunday.


Posted under Fog, Forecast Discussion

This post was written by Rachael Peart on March 27, 2017

Foggy Start, then Dreary End to Weekend

It will be another dreary and somewhat wet day across the board. The majority of rain falls before noon and then becomes scattered to isolated later in the day. Fog will be a concern this morning, as well, before burning off by the early afternoon. Highs today: 47-55. Winds today will be lighter than Saturday but still come from a northerly direction.

Overnight, we’ll be dry. Fog likely redevelops tonight for many locations. Lows tonight: 34-40. Mostly cloudy skies continue into your Monday. A stray shower is possible in our southern counties as another system tracks to our south. Similar high temperatures are expected tomorrow. Highs Monday: 47-54.

Completely dry conditions are expected Tuesday, plus partly cloudy skies – meaning more widespread sunshine returns to eastern Iowa. It won’t be long lived as another chance for rain returns midweek and lasts through late week. Rain won’t be continuous for everyone through this period. Highs this week stay steady in the low to mid 50s.


Posted under Fog, Forecast Discussion

This post was written by Rachael Peart on March 26, 2017

Dense Fog Advisory Friday Night

Fog Advisory

Tonight: A DENSE FOG ADVISORY is in effect. Areas of  fog continue to be dense in many locations. Light rain showers and drizzle are possible with temperatures remaining above freezing with lows in the mid 30s.

Saturday: A DENSE FOG ADVISORY is in effect during the morning. Fog is thick again through at least the morning hours. It improves slowly into the afternoon in some locations. Isolated light showers are possible. It will be a mild day with temperatures in the 40s and low 50s.

Wind Forecast

Saturday Night: Not much change with areas of dense fog and drizzle. Low temperatures mainly above freezing (32-35).

Sunday: Morning fog reveals a cloudy sky, but at least it will be dry. Mild temperatures in the low 40s continues.

Monday: This day might be our only chance for a few rays of sunshine. It will not be sunny…just a few rays of sunshine. Clouds will dominate with highs near 40.

Only a few light showers are possible through Monday evening. The map below shows the rain forecast through from Friday evening through Monday evening. 


Tuesday: Rain develops in the afternoon with highs close to 40.

The map below shows the position of the storm Tuesday morning and it is forecast to move northeast across Iowa Wednesday.


Wednesday: As the storms east past Iowa, there is a transition from rain to snow. Temperatures are cooler with morning highs in the mid 30s.

Thursday: Breezy and colder with highs in the lows 30s. A few light snow showers or flurries linger as the storm moves away from Iowa.

Friday: Clouds linger with a high near 30.


Posted under Fog, Forecast Discussion

This post was written by Schnack on January 20, 2017

Thursday evening weather update

Fog Advisory

Click on the DENSE FOG ADVISORY graphic above for a video update.


Posted under Fog, Update, Video

This post was written by Schnack on January 19, 2017

Dense Fog Advisory

DENSE FOG ADVISORY has been expanded north to Highway 20. Use caution overnight. Fog thins mid to late Tuesday morning.

Fog Advisory


Posted under Fog

This post was written by Schnack on January 16, 2017