Posts Tagged ‘severe thunderstorms’

Record Warmth, Then Severe Storms

UPDATED POST:  Tuesday, February 28, 2017, 11:13 a.m.

It’s now looking like that there’ll be a widespread severe weather outbreak across Illinois this afternoon and evening.

Here’s the updated categorical risk from the Storm Prediction Center.

Updated Moderate.gif

That large area of “moderate” risk in downstate Illinois is rather ominous since it wasn’t on the earlier update at 7:37 a.m.

For the Quad Cities and our part of Iowa and Illinois, we’re still under the “slight” to “enhanced” chances of severe weather this afternoon and evening.

Our biggest threat will be wind damage, followed by large hail.

But, there’s still a chance of a few strong tornadoes in our area.

As of this update, there are no watches in effect.

I’ll keep you updated as needed today.


ORIGINAL POST:  Tuesday, February 28, 2017, 5:05 a.m. (Map updated at 7:37 a.m.)

A storm system will bring us record or near record warmth today and then our first real severe weather threat this evening and early tonight.


A warm front associated with that storm moved through eastern Iowa and the Quad Cities earlier Tuesday morning with non-severe storms.

High temperatures today will warm into the 60s to near 70°.  The record high in the Quad Cities today is 66°.  That was set just last year.

Interestingly enough, our record low for today was set two years ago at -18°.  What a difference a year makes!

With unseasonably warm temperatures in place this afternoon, strong to severe thunderstorms will be breaking out across Iowa and Illinois as the cold front arrives.


These storms could bring large hail, damaging winds, and even a few tornadoes, especially east of the Mississippi River.  This threat will last through the evening hours.

Tomorrow, as colder air comes in, the rain showers could mix with or change over to light snow.


Storms Chances Tonight Near Zero Now; Good Chance Friday

6:12 pm Update:  That slight chance for strong thunderstorms this evening has diminished to almost zero chance.  However, we still have a good chance for a decent, soaking rain tomorrow night and Friday.


More strong to severe thunderstorms are possible across the Mississippi and Illinois Valley Wednesday afternoon and evening as a cold front brings us a real taste of fall this weekend.

This would be the second round of severe weather today if these storms develop.  In the early morning hours Wednesday, winds of 50-75 miles-per-hour were reported across eastern Iowa (73 mph in Muscatine, 66 mph in Iowa City, and 50 mph gusts in Louisa County).  Most locations picked up about one-half to three-quarters of an inch of rain.

The Storm Prediction Center has placed most of northern Illinois and a portion of eastern Iowa under a slight risk of severe thunderstorms through 7 a.m. Thursday.

At this point, it looks like hometowns east of the Mississippi River will most likely see the strong to severe thunderstorms.

Here is the forecast for damaging winds (58 mph or higher), large hail (one inch diameter or larger), and tornadoes Wednesday evening and night.

In the morning thunderstorms Wednesday, 0.62″ of rain fell at the Quad City International Airport, which ironically is twice the amount of rain that fell with the remnants of Hurricane Isaac this past weekend.

Behind the storms Wednesday night, another round of wet weather is likely Thursday night and Friday and then much cooler weather takes over this weekend.  Highs Saturday will only be in the 70-75° range with overnight lows in the 40s possible.