By Meteorologist Tom Skilling
More seasonable temperatures return to Chicago Thursday building on Wednesday’s 52-degree high.
Coincident with the arrival of the city’s first day with a normal temp of 60-degrees, Thursday afternoon’s peak reading is also to hit 60. It marks only the 9th time this year that Chicago’s temperature has been as warm or warmer.
Late season Midwest snowstorm hits the North Woods hard; accumulations have topped 1ft.
The storm responsible for the gusty southerly winds which began raking the Chicago area Wednesday have helped propel milder air into this area while fueling the latest snowstorm burying sections of the upper Midwest.
What’s interesting is that part of the area being lambasted by wind and snow across northern Wisconsin, Minnesota and Upper Michigan, may, in a matter of just days, warm areas to within striking distance of 60-degrees later this coming Easter weekend.
Snow totals reported late Wednesday—with snow still coming down—had reached 13.5” Grantsburg, WI; 12.3” Spooner, WI; 10.5” Hinckley, MN; 10” Hayward and New Post, Wisconsin.
April 2014′s has had its share of cool days—but the month’s running 1.6-degrees ahead of last year
April, 2014’s has generated its share of cool temperatures. But, the month’s average temperature has moved into positive territory. It’s the first time that’s happened in any months since last October. Thus, while subtle, the road to the warmer temps of late spring and summer is clearly underway—an effort which can be expected to yield warmth with increasing frequency in the weeks and months to come—-but area residents shouldn’t be fooled. Lake Michigan is still cold and a wind shift off the chilly waters can— and will—generate cool temperatures until water temperatures warm.
In late March I saw a bright green streak, a falling star. What accounts for that color? Air pollution?
— Frank Dezio
Meteoroids, orbiting the sun in huge numbers, are believed to be debris left over from the formation of the solar system.
They are occasionally captured by the Earth’s gravitational pull and, plunging at speeds up to150,000 mph, glow to incandescence because of friction with the atmosphere.
A brief streak of light, usually whitish, is the familiar result.
But astronomer Dan Joyce of Triton College tells us that a distinct green color is not rare.
The color of the streak has nothing to do with the atmosphere, he says.
The composition of the meteoroid is probably a reason for the color, and he suspects it is likely chromium.
It should come as no surprise that March was the coldest on record since 2002 for the contiguous United States. The average temperature was 40.5°, 1.0° below the 20th century average. It was the 43rd coldest March on record. It was the 8th coldest March on record for Illinois with a statewide average temperature of 33.8°, 7° below average. March was the fifth month in a row with temperatures much below average in Illinois.
Some highlights from the NOAA’s most recent State of the Climate report:
- Below-average temperatures dominated the eastern half of the contiguous U.S. during March. The largest departures from average occurred across the Great Lakes and Northeast, where nine states had temperatures that ranked among their 10 coldest on record. The persistent cold resulted in nearly two-thirds of the Great Lakes remaining frozen into early April.
- Most locations from the Rockies westward had above-average March temperatures. California had its ninth warmest March, with a statewide temperature 4.7°F above average. No state was record warm for March.
- On March 22nd, a large landslide impacted the Stillaguamish Valley near the town of Oso, Wash., causing at least 30 fatalities. Washington’s Climate Division 3, in which the landslide occurred, observed its wettest March on record. Its 8.67 inches of precipitation during March was more than twice the monthly average.
- According to the April 1 U.S. Drought Monitor report, 38.4 percent of the contiguous U.S. was in drought, up from 35.9 percent at the beginning of March. Beneficial precipitation fell in California during March, but did little to improve drought conditions — 23.5 percent of the state remained in the worst classification of drought (“exceptional”). Drought conditions intensified across parts of the Central and Southern Plains and expanded into parts of the Southeast.
- According to NOAA data analyzed by the Rutgers Global Snow Lab, March snow cover extent across the contiguous U.S. was the 22nd largest in the 48-year period of record at 845,000 square miles, about 104,000 square miles above the 1981-2010 average. Above-average snow cover was observed across the Northern Plains and Rockies, Midwest and Northeast where numerous storms brought heavy snowfall during the month. Below-average snow cover was observed for most of the West and southern Rockies due to season-long snow deficits.
By Meteorologist Tom Skilling
Tuesday’s 38-degree Chicago high temperature would have been right at home in February. The reading equals the “normal” high here on Feb. 22.
But the frigid 38-degree reading, 21-degrees below normal, occurred on “Tax Day” and was the coldest April 15 which has been observed here in the 86 years since 1928!
Daytime highs were actually higher in much of Alaska than in Chicago and adjacent areas of Illinois, Wisconsin and Michigan—reaching levels close to 50-degrees at a number of locations across the 49th state.
Chicagoans didn’t shiver alone; records fell at a number of Upper Midwest locations; frost and freeze warnings issued for 24 states overnight
The abnormal chill wasn’t limited to Chicago Tuesday. Morning readings dipped to new records at International Falls, Minn.( 5 degrees), Sioux Falls, S.D. and Grand Forks, N.D. (11 degrees); Watertown, S.D. (12 degrees) and at both Minneapolis, Minn. and Madison, Wisconsin (18 degrees).
Frost and freeze warnings were hoisted across 23 states south and east of Chicago—from eastern Oklahoma across much of the Deep South to New Jersey, Delaware and Maryland.
Tuesday highs averaged more than 20-degrees below normal south as far as Georgia, Alabama and Mississippi.
Only 4 other days beyond April 15 have generated daytime highs of 38-degrees or lower in over a half century at O’Hare
Weather observations began at O’Hare in 1959. In all that time, temps of 38-degrees or lower have occurred beyond April 15 on only 4 other occasions.
Milder temps Wednesday and Thursday to yield to a chilly, new round of “NE” winds Friday
Temps stage a modest recovery with the arrival of Wednesday’s powerful southerly winds. The “warming” may linger into a second day Thursday. But a thermal downturn, prompted by the re-emergence of northeast winds Friday, is to render the “warming” short-lived.
Daytime highs Friday may remain in the 40s in areas close to Lake Michigan.
South winds Easter Sunday could send temps surging into the 60s
More significant warming is in the offing over the weekend—particularly Easter Sunday. At that time, a new round of powerful southerly winds is to send temps back into the 60s.