Early Heat

HotToday (April 22) is the earliest date in Iowa having a 100 degree temp. The only locations to hit the 100 degree mark on this day were Waterloo and Fort Dodge in 1980. The next earliest 100 degree temperature in Iowa occurred on May 6, 1934 in Sioux City.

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Posted under Records, Temperatures

This post was written by Schnack on April 22, 2013

Canada Had It’s 1st Tornado of The Season

Last week, on April 18, Canada had it’s first tornado of the season. What made this a historic tornado is not the size, path, width or strength of it. The historic part is that it was the first tornado rated on the EF scale. Canada has adopted the EF scale this year while the United States has been using it since  2007. Here is the report from Environment Canada…the National Weather Service in Canada.

AWCN11 CWTO 191928
UPDATED WEATHER SUMMARY FOR ALL OF SOUTHERN ONTARIO AND THE
NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA
AT 3:21 PM EDT FRIDAY 19 APRIL 2013.

-------------------------------------------------------------
==WEATHER EVENT DISCUSSION==

..FIRST TORNADO OF THE SEASON IN ONTARIO CONFIRMED..

AT APPROXIMATELY 5:45 PM EDT ON THURSDAY, APRIL 18, A STRONG LINE OF
THUNDERSTORMS MOVED THROUGH THE SHELBURNE AREA TO THE NORTHWEST OF
TORONTO. BASED ON A DAMAGE SURVEY BY ENVIRONMENT CANADA PERSONNEL,
ONE OF THESE THUNDERSTORMS PRODUCED A BRIEF ENHANCED FUJITA (EF) 1
TORNADO APPROXIMATELY 6 KILOMETRES TO THE NORTHWEST OF SHELBURNE. AN
EF-1 TORNADO HAS PEAK WINDS BETWEEN 135 AND 175 KILOMETRES PER HOUR.
THE KEY DAMAGE NOTED AT THIS SCENE WAS A BARN WITH ITS ROOF AND TWO
WALLS REMOVED WITH SOME PIECES OF THE BARN FIRMLY EMBEDDED INTO THE
GROUND AT A DISTANCE OF 50 TO 100 METRES FROM THE ORIGINAL LOCATION.
THE TOTAL LENGTH OF THE DAMAGE PATH WAS 500 METRES WITH A WIDTH OF
75 METRES. INVESTIGATIONS ARE CONTINUING IN THIS AREA THAT MAY
RESULT IN THE LENGTH AND WIDTH OF THE DAMAGE TRACK CHANGING OR OF
THE POSSIBILITY OF OTHER TORNADOES. THIS STATEMENT WILL BE UPDATED
AS NEW INFORMATION BECOMES AVAILABLE.

THIS IS THE FIRST TORNADO OF THE SEASON, NOT ONLY IN ONTARIO BUT IN
ALL OF CANADA. THE SUMMER SEVERE WEATHER SEASON NORMALLY BEGINS IN
LATE APRIL AND ENDS IN EARLY OCTOBER. ONTARIO SEES AN AVERAGE OF 12
TORNADOES EACH YEAR. THIS TORNADO ALSO REPRESENTS THE FIRST TORNADO
IN CANADA TO BE RATED USING THE ENHANCED FUJITA (EF) SCALE AS OPPOSED
TO THE ORIGINAL FUJITA SCALE. THE NATIONAL WEATHER SERVICE ADOPTED
THE EF SCALE IN 2007 AND ENVIRONMENT CANADA HAS MONITORED ITS USE
SINCE THAT TIME AND HAS DECIDED TO ALSO ADOPT THIS SCALE BEGINNING
THIS YEAR. THE TYPES OF DAMAGE PRODUCED BY TORNADOES ON EITHER THE
ENHANCED FUJITA SCALE OR THE ORIGINAL FUJITA SCALE ARE SIMILAR.
HOWEVER, THE WIND SPEEDS OF THE VARIOUS CATEGORIES HAVE BEEN ADJUSTED
BASED ON THE BEST AVAILABLE KNOWLEDGE CONCERNING THE WINDS REQUIRED
TO DAMAGE STRUCTURES, VEHICLES AND TREES.

THIS WEATHER SUMMARY CONTAINS PRELIMINARY INFORMATION AND MAY NOT
CONSTITUTE AN OFFICIAL OR FINAL REPORT.

END/OSPC

 

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Posted under Severe Weather

This post was written by Schnack on April 22, 2013

Showers Tonight…Spring Temps Later this Week

 


UPDATED at 4:00 PM

Tonight: Cloudy with scattered showers. Low: 34-42. Wind: N 5-15 mph.

Tuesday: Cloudy and windy with a 50% chance of showers. High: 41-47. Wind: NW 15-25 mph.

Tuesday Night: Mostly cloudy and colder. Low: 27-31. Wind: NW 5-15 mph.

Wednesday: Mostly cloudy. High: near 50.

Thursday: Partly cloudy. High: low 50s.

Friday: Partly cloudy with a 20% chance of showers. High: low 60s.

Saturday: Partly cloudy. High: upper 60s.

Sunday: Partly cloudy and windy (S 15-25 mph). High: near 70.

Monday: Partly cloudy and windy (S 15-25 mph) with a 20% chance of showers/storms. High: Low 70s.

We have had a relatively mild day with temperatures as of 3 pm mainly in the 60s. Not too far to the northwest, on the other side of the stationary front, is much colder air (see map below).

Blog Graphic 1

There is a widespread area of rain in western Iowa and it is forecast to track east this evening with more expected tonight and Tuesday. It is cold enough for snow in far northwest Iowa. The accumulating snow will remain northwest of eastern Iowa. Here is the radar this afternoon.

Blog Graphic 2
As the rain ends Tuesday the rain totals will be generally 0.25”-0.50”. Here is the rain forecast on a map.

Apr 22 QPF

Our friends in Minnesota can’t catch a break this spring. They are expected more snow with some locations getting more than 4” from the same storm system we will get rain out of. Here are the best chances to see 4”+ Monday evening to Tuesday evening.

Apr 22 day1_psnow_gt_04
After the storm pulls away we are in for a stretch of mainly dry weather. There is a slight chance of a few light rain showers Friday, but other than that dry weather will continue through the weekend. Not only will we not see much rain but….are you ready for this….forecast high temperatures could get into the low 70s for a few days. That is right…spring temperatures are on the way.  According to that Climate Prediction Center (CPC), the 8-14 day outlook keeps Iowa with near normal temperatures and near normal precipitation from April 30 to May 6.

Apr 22 814temp_newApr 22 814prcp_new

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Posted under Forecast Discussion

This post was written by Schnack on April 22, 2013

April 22

TodayinWeatherHistoryFrom NWS
1986
: A late outbreak of cold weather brought the temperature down into the low to mid 20s across most of the state, bottoming out at 20 F at half a dozen locations including Waterloo and 19 F at Cresco, Fayette, Manchester, and Mason City.

1980: Very hot weather shot the temperature all the way up to 100 F at Fort Dodge and Waterloo setting the all-time Iowa high temperature record for the month of April. At Guttenberg, Sioux City, and Webster City the temperature peaked at 97 F while at Jefferson, Newton, and Oelwein it reached 96 F. At Des Moines the high was 93 F which remains the warmest temperature ever recorded in April at that location. Remarkably, this record breaking heat followed just eight days after the latest significant snow storm in 13 years dropped half a foot of snow on southeastern and eastern Iowa on the 14th.

 This Day in National/World Weather History …
 22 April 1932 → In Elgin, Manitoba 52 wild geese were struck by lighting in flight and killed.
 22 April 1985 → Toronto, Canada hit 86 degrees, making it not only the warmest day of the month, but also the warmest day of the entire year. Unfortunately the Blue Jays lost their home game to the Kansas City Royals 2-0.
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Posted under Weather History

This post was written by Schnack on April 22, 2013