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

Dense Fog Advisory Tonight

A DENSE FOG ADVISORY is in effect for parts of eastern Iowa tonight. Visibilities will be reduced to less than 1/4 mile at times.
Fog Advisory

DMA Visibility3D


Posted under Fog

This post was written by Schnack on January 2, 2017

Light Rain, Drizzle and Fog Tonight

Fog is reducing visibility to less than 1 mile at times across eastern Iowa. Make sure to turn on your headlights when driving.
DMA Visibility3D

Tonight: Light rain, drizzle and fog will continue until late tonight…maybe about 3 or 4 AM. Temperatures remain above freezing until the rain/drizzle end. At that point the temperatures will drop into the upper 20s. The fog also thins out as the temperatures drop.

Tuesday: Wind gusts to 30 mph from the northwest bring in colder air. Temperatures in the morning will be the warmest of the day in the upper 20s. Temperatures fall through the day and be in the teens by evening. Little to no sunshine is expected.
Wind Forecast

Tuesday Night: The gusty northwest wind continues through the night as temperatures drop into the single digits by morning. The clouds slowly break up overnight.

Wednesday: The wind gradually diminishes during the afternoon with a mix of sun and clouds. We are in for another stretch of Arctic air and it began Tuesday night. Check out the potential wind chills Wednesday morning.
DMA FutureTrack Wind Chill

Thursday/Friday: The sky is mostly cloudy both days with highs in the single digits Thursday (coldest day of the week) and warming into the teens Friday.



Posted under Fog, Forecast Discussion

This post was written by Schnack on January 2, 2017

ICYMI Sept 20…Fog/Flooding Debris/Italy

It was a foggy start across parts of the KWWL viewing area Tuesday, especially northeast Iowa.  Dense Fog caused several school districts to delay the start of school for two hours early this morning.  Here’s the view from early this morning in Coralville and Dubuque on our Storm Track 7 Live Weather Network cameras.
Weather Bug Multi 2 Cam social








This is the result of the Upper Iowa River flooding at the end of August. The debris field is located in the Big Slough in Pool 9, right across from Blackhawk Park near New Albin (Allamakee County). These photos were taken by Mike Brennan on Sunday.



Suomi NPP #VIIRS Day/Night Band.  The University of Wisconsin-Madison posted the snapshot of moonlit fog.  This was revealed from the  Suomi NPP VIIRS Day/Night Band.  (VIIRS stands for Visible Infrared Imaging Radiometer Suite).

moonlit fog











The photo below is a view of the southern tip of Italy from the International Space Station on September 16, 2016.



Posted under Astronomy, Flooding, Fog

This post was written by Schnack on September 20, 2016