Flooding Rains, Thunderstorms, & Snow All In One Day!

UPDATED POST:  THURSDAY, FEBRUARY 20, 3:33 p.m.

That last round of thunderstorms has now pushed us up to 1.28″ of rain since midnight at Quad City International Airport in Moline, Illinois.

Our monthly precipitation total now stands at 2.82″.  That means this is now the 10th wettest February on record in the Quad Cities, in addition to the snowiest February on record and one of the coldest Februarys on record!

UPDATED POST:  THURSDAY, FEBRUARY 20, 5:19 a.m.

Our first thunderstorms of 2014 moved through the area early Thursday morning.

Morning Radar

More showers and thunderstorms will move through the area through early Thursday afternoon.  Some of the storms to the east of us this afternoon may contain hail.

We could see another one-half to one inch of rain, especially from the Quad Cities south and east.

It’s a much different story across Iowa today.  Heavy snow, up to 10″-12″ in some locations, is on the way.  Here are the latest advisories.

Iowa Advisories

The red you see in Iowa is a “Blizzard Warning”.  The purple is a “Winter Weather Advisory” and the fuchsia is a “Winter Storm Warning”.

Illinois Iowa Advisories

Closer to the Quad Cities, the problem today will be potential flooding and wind.  The tan-colored area is a “Wind Advisory” and the maize color is a “High Wind Warning”.

Winds late this afternoon and tonight will blow out of the west at 20-50 miles-per-hour.

We’ll also see light snow that will become blowing snow and reducing visibilities.  Most locations will see little, if any, accumulation around the Quad Cities.  Up around Dubuque, Iowa, we may pick up 1-2″.

Be safe out there this afternoon and tonight.

Anthony

ORIGINAL POST:  WEDNESDAY, FEBRUARY 19, 4:17 p.m.

The next 24 hours will feature a little bit of everything, so it should satisfy all:  sunshine and 40°+ today, heavy rain and thunderstorms tonight, and snow, howling winds, falling temperatures, and blizzard-like conditions Thursday afternoon and evening!

Iowa and Illinois, brace yourself!  You know what they say:  “If you don’t like the weather in the Midwest, wait 15 minutes and it’ll change!”

First off, take a look at the advisories for Illinois and Iowa and then I’ll try to sort it out.  And, thank you to the Quad Cities and Des Moines National Weather Service offices for these easy to read maps.

Iowa Illinois AdvisoriesIowa Advisories

First off, the green indicates a “Flood Watch” from 3 a.m. until 3 p.m. Thursday.

Rain and a few thunderstorms will move across eastern Iowa and northern Illinois later tonight and Thursday morning.  Rainfall amounts could easily top one inch.

This rain falling on the frozen ground and the melting snow from the past couple of days will cause considerable runoff and there’s nowhere for the water to go!

Here are the forecast maps at 6 p.m. Thursday from both the GFS and the NAM.

18Z GFS Thursday 6 pm 18Z Thursday 6pm NAM

Both basically show the storm moving right over the Quad Cities during the evening.   This means we’ll stay in the warmer air longer and have a shorter window of snow.

So, late in the day Thursday, temperatures will crash and the rain will mix with and quickly change over to snow as the winds start howling out of the northwest at 20-40 miles-per-hour (mph) with 50 mph gusts possible.

Accumulations in the Quad Cities will be around 1-2″ before the snow ends late Thursday night.

South and southeast of the Quad Cities, an inch or less of snow is possible.

Northwest of the Quad Cities, 2-3″ may accumulate.  However, it’s not the amount of snow that is the problem.  It’s the combination of wind and snow that will reduce visibilities off to the northwest causing blizzard-like conditions.

Since this storm is developing out in the Rockies, there could be a shift.

CBS4

Make sure you check the latest weather forecast Thursday morning before heading off to work or school.

I’d greatly appreciate it if it’s “CBS4 News This Morning” from 5-7 a.m that you choose. 🙂

Anthony

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One response to this post.

  1. Posted by Cinchy on February 19, 2014 at 6:40 pm

    I’m hoping for a thunderstorm…⚡

    Reply

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