This Day In Weather History…September 16

today-in-weather-historyFROM THE NWS
1978
: Severe thunderstorms produced an F3 tornado that traveled across central Iowa from near Baxter through Grinnell killing 6 people and injuring 45 others. This was the last tornado to kill at least six people in Iowa until the Parkersburg storm of 2008. Many of the injuries and 4 of the fatalities occurred south of Grinnell at the Interstate 80 exit at Highway 146 where several businesses and vehicles were struck. The storms also produced large hail with stones as large as 3 inches in diameter falling around Waterloo and Cedar Falls.

1881: The earliest Iowa snowfall on record affected most of the western half of the state during the morning hours. September of 1881 was a wet month generally across the upper Midwest, and on the 15th a low pressure system moved northward over Chicago then turned west and stalled over Iowa on the 16th drawing unseasonably cool air into the state. As a result rain fell all day on the 15th then began to mix with snow at times across about the northwestern two thirds of Iowa on the morning of September 16th. At Sibley and Sac City the snow did not accumulate but observers indicated that “snow fell all day” and at Algona an estimated 4 inches of snow fell between about 8 and 11 am with another observer there noting that tree branches were broken by the weight of the snow, which all melted by noon. At Des Moines the Weather Bureau observer noted “few flakes of snow was observed 1.15 pm.” Snow was also reported at Sibley and Smithland in northwestern Iowa, at McGregor in the northeast, and in the south and southwest was observed as “quite heavy” at Creston while several inches of snowfall were noted between Des Moines and Atlantic and 4 to 6 inches were estimated between Stuart and Avoca in Pottawattamie County. This incredible storm marks the earliest date of the fall on which any snow has ever been reliably recorded in Iowa.

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Posted under Weather History

This post was written by Schnack on September 16, 2013

Weather Hot Shots on Mon. September 16

Submit your weather Hot Shot by clicking here.
One photo is shown on the 5 pm newscast and one on the 10 pm newscast.

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Posted under Hot Shots, Photo

This post was written by Schnack on September 16, 2013

Beneficial Rain Ahead

Forecast Bar

UPDATED at 4:30 PM

Tonight: Mostly clear and cool. Low: 42-46. Wind: SE 5-10 mph.

Tuesday: Mostly cloudy with a 20% chance of showers. High: 68-73. Wind: SE 5-10 mph.

Tuesday Night: Cloudy with a 60% chance of showers/storms. Low: 57-61. Wind: SE 5-10 mph.

Wednesday: Mostly cloudy with a 50% chance of showers/storms. High: low 80s.

Thursday: Mostly cloudy with a 50% chance of showers/storms. High: low 80s.

Friday: Mostly sunny. High: low-mid 70s.

Saturday: Mostly sunny. High: low 70s.

Sunday: Mostly sunny. High: low-mid 70s.

Monday: Partly cloudy. High: low-mid 70s.

Weather Extra Bar

Clouds have slowly been clearing from east to west this afternoon across eastern Iowa. We are positioned south of the large high pressure system putting us in a position to receive cool and dry air from the east.

Sep 16 Current Map

The sky will remain clear most of the night. Clouds will slowly start to move back well after midnight. Patchy fog will be possible early Tuesday morning. Tuesday will be mostly cloudy, but rain chances will be low. The development of any rain will be pushing up against very dry air. So any rain that falls will be light and isolated until Tuesday night. There will be two periods of time where the rain chances will be the best. No severe weather is expected at this time.
#1 Tuesday night and Wednesday morning
#2 Thursday

If you combine the rain forecast from these two time periods…rain amounts will add up to more than 1” in many locations and possibly close to 2” in isolated areas. The map below is the rain potential from Monday evening to Thursday evening.

Sep 16 Rain Forecast

High pressure will keep our weather dry Friday through early next week. The 8-14 day outlook (Sep 24-30) from the Climate Prediction Center keeps our temperatures above normal with above normal precipitation.

Sep 16 8 to 14 day Outlook

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Posted under Forecast Discussion

This post was written by Schnack on September 16, 2013