Strong Wind Today and Windy Again Tuesday

A large area of low pressure over the Midwest is the reason for the colder temperatures this week. Temperatures will remain below normal through the weekend.


Wind gusts today were close to 50 mph. Tuesday will be windy again with gusts near 35 mph. The wind increases around 8 or 9 AM Tuesday and remains windy until after sunset.

Peak Wind Gust - 4 Lines

We had a few showers this afternoon and got reports of small hail from some locations with photos from Solon and south of Hudson.

2 1


Here is how much rain fell Saturday/Sunday/Monday:

Waterloo 1.28″
Dubuque 0.64″
Cedar Rapids 1.69″
Iowa City 1.12″


Posted under Update

This post was written by Schnack on April 20, 2015

Warm and Windy Wednesday….Showers/Storms Wed Night

We are tracking a cold front and it is forecast to push though eastern Iowa Wednesday night. We will have a warm and windy (S 15-30 mph gusts 35 mph) Wednesday. High temperatures will be in the 70s and could be pushing 80 across southern Iowa.

There is a slight risk of severe weather west of I-35 Wednesday/Wednesday night.

Any severe storms to our west will weaken before making it into eastern Iowa Wednesday night. The showers/storms (non-severe) will end by noon Thursday. Some beneficial rains are possible. Some locations could see more than 1″ of rain.


Posted under Update

This post was written by Schnack on March 31, 2015

Tuesday Evening Weather Update

The weather profile of the atmosphere this evening is set for rain/freezing rain/sleet/snow. It just depends on where you are in eastern Iowa. In parts of central and eastern Iowa (roughly along Highway 20) sleet and freezing rain is falling. The vertical profile of the atmosphere typically looks like this for freezing rain to occur. Similar profile for sleet.


In northern Iowa, there is not much of a warm layer, so light snow (around 1″) is still possible tonight. In parts of central and east central Iowa there is a warm layer aloft and it doesn’t look like it is going to cool off very much while the precipitation is around.

Here is the temperature profile of the atmosphere this evening roughly over the area near Highway 20..

27° 700 mb (cold)
36° 500 mb (warm)
31° Surface (cold)

Areas south of Highway 20 are most likely to be just rain.

Here are a couple of photos of freezing rain near Stanley Tuesday evening.
Viewer Photo 1 Viewer Photo 2

Precipitation is still forecast to taper off between 1 and 3 AM, from west to east. Use caution on the roads since some of the roads will be icy. Elevated surfaces have the best chance of icing up later tonight. Temperatures will hold steady near freezing all night.


Posted under Update

This post was written by Schnack on March 24, 2015

Fog Thins Then Sunny



One of the charts we look at to show the depth of the fog is a Skew-t.



Here is what was left of the fog around noon.



The map below shows the temperatures across the nation at noon central time. The temperatures look more like spring than winter.


Posted under Update

This post was written by Schnack on March 10, 2015

Monday Evening Update

Low pressure over Colorado, this evening, is forecast to track east into Kansas tonight and then turn northeast through Iowa Tuesday.


A wintry mix is forecast to develop after midnight and quickly taper off around noon Tuesday. As the low moves into western Iowa Tuesday morning a warm front will lift north producing snow in northern Iowa and a light wintry mix south.

Tue Storm 7 AM
Generally north of Highway 20,  1-2″ with isolated 3″ of snow along the IA/MN state line, is possible. Areas south of the highway will see a light icy glaze in the morning before temperatures warm into the upper 30s late in the morning. Here is the probability of 1″+ of snow:

Mar 1 Snow Prob

Here is the probability of 0.01″ of ice:

Mar 2 Ice

Notice the amount of precipitation is going to light, but the roads could be pretty slick at times.

By noon, the low is exiting the state and the precipitation has just about come to an end. After the cold front pushes through, the wind direction will turn to the northwest with gusts to near 35 mph at times.

Tue Storm Noon

The temperatures will become much colder as we get into Tuesday night. Wednesday morning lows will be near zero and wind chills below zero.

Just two cold days, Wednesday and Thursday, before temperatures warm into the 30s (could be some 40s) Friday into early next week.


Posted under Update

This post was written by Schnack on March 2, 2015

Updated Snow Chances

The sky is clear this evening. If you look west you are able to see the planes Mars and Venus.
Feb 23 planets


Now to the weather. A cold front will move south across Iowa around midday switching the wind direction from the SW to the NW. Here is the forecast position of the cold front Tuesday evening.

Feb 23 forecast map
Temperatures will slowly warm into the teens by sunrise Tuesday and eventually into the low 30s by early afternoon. Not only will the wind direction change, as the front crosses, the temperatures will begin to fall in the afternoon as well. Late Monday night and Tuesday is going to be WINDY. Wind gusts to near 40 mph are possible. The wind diminishes Tuesday evening.

Clouds increase Tuesday night as we track low pressure southeast. Here is the forecast track.

Feb 23 Forecast Track

Light snow will develop late Wednesday morning and spread southeast across eastern Iowa in the afternoon. Your Wednesday evening commute could be slick with about 1″ of snow. The snow tapers off before 10 PM Wednesday. Here is the probabilities for 1″+ and 2″+.

Feb 23 Probability

It should be a powdery snow since the temperatures will be so cold Wednesday…highs in the teens. A light wind is expected as the snow falls.

Schnacks Blog 1

The next chance of snow will come Saturday afternoon or evening through Sunday. Early indications are that several inches of snow are possible with this storm. Exactly where that heavier snow falls is unknown this far out. The pattern is expected to start to change this weekend. When weather pattern goes through a change like this the models have a hard time in the extended forecast. We will continue to track the storm and have more details as the weekend approaches.


Posted under Update

This post was written by Schnack on February 23, 2015

Thursday Evening Update on Snow

No changes in the forecast from earlier this afternoon. We are still tracking the chance for scattered snow showers to push through the eastern part of the state after midnight and taper off Friday morning. Any accumulation will be light…less than 1″. The map below shows the chances of 1″+ snow. The percentages are very low.


Here is the forecast snow totals. There will be some locations with just trace amounts. Any accumulation will make roads slick Friday morning so use caution on the roads if you encounter any snow covered roads.



Posted under Update

This post was written by Schnack on February 19, 2015

Snow Saturday Night

61 2345


Posted under Update, Winter Weather

This post was written by Schnack on February 1, 2015

Friday Afternoon Update on the Weekend Snow

9:30 PM UPDATE to include the WINTER STORM WATCH.


The sky will be mostly clear tonight.

Jan 30 Vis Sat

Low pressure is forecast to move east across Missouri Sunday bringing snow to Iowa.


Clouds increase early Saturday morning with snow developing late in the afternoon (mainly after 3 pm). Here is forecast where the snow should be at 7 PM Saturday.

Blog Graphic 1

Snow becomes widespread across Iowa during the evening. Snow continues through Sunday morning before tapering off in the afternoon. Heaviest of the snow will fall from 10 PM Saturday through noon Sunday.

Expect hazardous conditions on the road Saturday evening through Sunday night.

Here is the latest snow forecast.
Blog Graphic 5


The gusty northeast wind will increase Saturday night and remain windy through Sunday blowing. This will cause blowing snow and at times reduced visibility.  The strongest wind will be from midnight Saturday through about 8 PM Sunday.

Jan 30 Wind Forecast

Sunday will be much colder with wind chills during the day near zero or slightly below.  Temperatures remain in the teens throughout the day.

Clouds clear late Sunday night giving us sunshine to start Monday. Clouds increase in the afternoon as we track the next chance of snow to be here Tuesday morning into Wednesday morning.


Posted under Update

This post was written by Schnack on January 30, 2015

Snow This Weekend

The latest snow forecast brings snow to the area Saturday evening and continue through Sunday before tapering off in the afternoon. The wind will be strong (N 15-25 mph) Sunday causing blowing snow. Travel will be hazardous Sunday. Blog Graphic 3



Posted under Update

This post was written by Schnack on January 29, 2015