Chicago's 9-day run of temperatures well above normal came to a blustery and unceremonious halt Thursday. That warm spell  had generated seven of 2013's nine days with 80s, including the year's only official 90-degree reading.

 

 

In sharp contrast, Thursday managed a high temp of only 54-degrees, 20-degrees below the peak reading which had occurred only the day before---a temperature which was 18-degrees below normal. The reading equaled April 2's  normal high---a  temperature most likely to occur 7 weeks earlier!

 

 

And, as if the chill wasn’t enough, the unseasonably cool readings rode wind gusts which topped 50 mph into the city. The powerful flow, which ran the length of Lake Michigan into Chicago, piled up 13 ft. waves which pounded the Lake Michigan shoreline here.

 

Friday’s unlimited sun and lighter winds welcome---but the temp rebound they generate is to be modest and well off historic norms

 

Temperatures surge back into the 60s Friday afternoon thanks to nearly unlimited sunshine. That's a 10-degree improvement over Thursday’s chilly maximum---but still well below the normal high which is 73-degrees on May 24.

 

Powerful t-storms rake the southern Plains, some with 110 mph straight-line gusts; others spin-up tornadoes

 

 

Downpours swept tornado- ravaged Moore, Oklahoma early Thursday while powerful new thunderstorms later in the day sent high winds, hail the size of tennis balls and a new flock of tornadoes into the southern Plains. The twisters' target this time was west Texas. Winds there gusted to 110 mph at Rotan; 105 mph 9 miles west of Albany, 92 mph a mile southeast of Jayton, and 80 mph at Cone---all in Texas.  The storms blew roofs off houses in Abilene.

ASK TOM: Bomb a tornado?

Posted on: May 23rd, 2013 11:22 PM by CWC Staff

 

Dear Tom,

Could a tornado be dissipated with explosives?

-- Kenneth Deering, Springfield, Ill.

 

Dear Kenneth,

 

Meteorologist Roger Edwards of the National Weather Service’s Storm Prediction Center has these comments. “The main problem with anything which could realistically stand a chance at affecting a tornado (e.g., hydrogen bomb) is that it would be even more deadly and destructive than the tornado itself. Lesser things (like huge piles of dry ice or smaller conventional weaponry) would be too hard to deploy in the right place fast enough, and would likely not have enough impact to affect the tornado much anyway. Imagine the legal problems one would face, too, by trying to bomb or ice a tornado, then inadvertently hurting someone or destroying private property in the process. In short — bad idea!”

On little cat feet?

Posted on: May 23rd, 2013 3:08 PM by Steve Kahn No Comments

 

Thanks to Tracey Surface (and  apologies to Carl Sandburg) for sharing these shots of fog rolling into the city off the lake near  Montrose Harbor on Wednesday evening.

 

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Photos by Tracey Surface

Photos by Tracey Surface

 

 

 

 

It’s the wettest spring here in 30 years and ranks 2nd-wettest since 1871

Posted on: May 23rd, 2013 1:57 AM by Tom Skilling

 

 

It's official! This spring's rainfall is now truly one for the books.

 

With just over a week left in the meteorological spring season, which runs from March 1 through May, the 14.29" which has fallen to-date, makes this Chicago's 2nd- wettest on record the past 142 years.

 

Wednesday downpours, some thundery, contribute to a number of 1.50"+ totals

 

Wednesday's selective downpours totaled 2.15" at Wilmette, 1.80" at Northfield, 1.73" Niles, 1.62" Glencoe and  1.33"  at O'Hare. The latest round of t-storms has pushed May 2013's monthly tally to 3.61", while the spring total is 168% normal.

 

“Full-fetch” north/northeast winds shave temps by nearly 20-degrees Thursday; 9-day above normal streak ends as April-level chill takes over

 

Chicago temps take a big "hit" Thursday as brisk north/northeast winds travel into the city after a near-280 mile trip over Lake Michigan's chilly waters.

 

The set-up is predicted to slash readings by up to 20-degrees---compared to Wednesday's temps--- and will take readings down to the 50s (and even some upper 40s along Lake Michigan), level which equal the normal temps found in April.

 

The chill is to end the longest string of consecutive above normal days---9 of them--- in the 4.5 months since January.

ASK TOM: “Tornado Alley”

Posted on: May 22nd, 2013 11:09 PM by CWC Staff

 

Dear Tom,
I hear the term “tornado alley” being used frequently. What area is being referred to? Does the Chicago area have a tornado alley?

--Jacob Tonns
Dear Jacob,
“Tornado alley” is an often used but inconsistently applied term and, as the American Meteorological Society notes, “Since (tornado) statistics are variable on all-time scales, the term has little scientific value.”
This is especially true when the body of tornado data is restricted to a relatively small geographical area such as metropolitan Chicago. Conclusions drawn from such a limited database are meaningless.
Broadly speaking, U.S. tornadoes occur most frequently in the area from north-central Texas through Oklahoma, Kansas and Nebraska into central South Dakota. This area is loosely defined as tornado alley.

Clouds over Chicago

Posted on: May 22nd, 2013 6:50 PM by CWC Staff

 

Tuesday evening cottony cumulus clouds are framed against the Willis Tower in this shot Michael Lyons.

Photo courtesy Michael Lyons, Downtown Chicago

Photo courtesy Michael Lyons, Downtown Chicago

Forked lightning over downtown Chicago

Posted on: May 22nd, 2013 5:16 PM by CWC Staff

 

Look at this remarkable array of forked lightning over downtown Tuesday evening from Adam Oles, Chicago.

Photo courtesy of Adam Oles, Chicago

Photo courtesy of Adam Oles, Chicago

Cumulus over Wauconda

Posted on: May 22nd, 2013 5:38 PM by CWC Staff No Comments

 

A close-up of last evening's billowy, towering cumulus over Wauconda are the subject of this photo which was taken by Dirk Leahy produces quite a scene, doesn't it? The Alpenglow oranges and reds are quite fanstastic!

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Photo courtesy of Dirk Leahy, Wauconda, IL