Dubuque Storm from a Distance

The photos below were taken of the storm south of Dubuque that produced 1-2.5″ diameter size hail this evening.

Taken from Vinton by Jason Hicok

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Taken from Independence by Sandy Martin
DBQ Sandy Martin

Taken by Becky Meisgeier

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Taken 3 miles NE of Hazleton by Danny Murphy

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This post was written by Schnack on April 29, 2013

Hail Photos

Here are some photos of the hail from the storms this morning.

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Posted under Photo, Severe Weather

This post was written by Schnack on April 29, 2013

Weather Hot Shot on Mon. April 29

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 April 29, 2013

A Wet Week Ahead…Colder By Thursday


UPDATED at 4:20 PM

Tonight: Partly cloudy with a 30% chance of showers/storms. Low: 57-61. Wind: S 10-20 mph.

Tuesday: Partly cloudy with a 30% chance of showers/storms. High: 76-84. Wind: SW 10-20 mph.

Tuesday Night: Mostly cloudy with a 60% chance of showers/storms. Low: 46-56.

Wednesday: Cloudy with a 60% chance of showers and isolated storms. High: low 50s to upper 60s.

Thursday: Cloudy with a 60% chance of showers. High: mid 40s.

Friday: Cloudy with a 50% chance of showers. High: mid 40s.

Saturday: Cloudy with 40% chance of showers. High: mid 50s.

Sunday: Cloudy with 30% chance of showers. High: near 60.

Monday: Mostly cloudy. High: mid 60s.

A cluster of storms producing hail this morning tracked east along and mainly north of Highway 20. Hail was as large as 1.5” in diameter. By the time the storm arrived to the Mississippi River most of the hail reports were less than 0.5” in diameter. Here is just one of many photos of the hail. It was taken in Cedar Falls.

Apr 29 Hail
The map below shows the rain estimate from the radar. It also shows the a rough idea of the path the core of the hail fell (red line).

Apr 29 Hail Path

There is chance of showers and storm to develop somewhere in SW Iowa tonight and track northeast. Isolated severe storms are possible with the main threat being hail and wind. A cold front is forecast to cross eastern Iowa Tuesday evening. Along the front there is another chance of isolated severe storms again. Hail and wind the primary threat. Here are the SPC severe weather outlooks for tonight and Tuesday.

Apr 29 Svr Wx Outlook
Here is the WPC forecast position of the cold front Tuesday evening.

Apr 29 Tue Eve Sfc Map
An area of low pressure will develop in the upper levels of the atmosphere and be cut off from the main air flow (typically west to east). Since it does not fall in the main air flow the low will not move very much for a few days. This is very typical of cut off lows. Under and around the low it is cloudy and cool with scattered showers. That is exactly what we should expect Wednesday through Sunday. The map below shows the upper level low over Kansas and Oklahoma Friday morning.

Apr 29 Upper Level Low
The coldest days, through Monday will be Thursday and Friday with high temperatures in the low to mid 40s.

The persistent rain expected each day will add up after awhile. Rain amounts could range from 2-4” across parts of Iowa. Here is the rain forecast from Monday evening to Saturday evening.

Apr 29 QPF
Finally by the time Monday rolls around the low will slowly move east and dry weather will be back as well as warmer temperatures.

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Posted under Forecast Discussion

This post was written by Schnack on April 29, 2013

April 29

TodayinWeatherHistoryFrom NWS
1984
: A late season snowfall occurred across portions of northwestern Iowa where reported amounts included 5.8 inches at Le Mars, 6.0 inches at Pocahontas, Sioux Center, and Storm Lake, 7.0 inches at Emmetsburg, Galva, and Lake Park, and 8.0 inches at Holstein.

1956: A late season winter storm produced heavy snow over northwestern Iowa with an amazing 11.0 inches reported at Lake Park, making this the latest date of the year on which more than 10 inches of snow has fallen anywhere in Iowa. Other snowfall amounts included 8.6 inches at Sheldon, 8.0 inches at Rock Rapids, 7.0 inches at Sibley, 6.0 inches at Emmetsburg, and 5.0 inches at Hawarden and Spencer.

1907: A very warm March was followed by an exceptionally cold and snowy late spring with Des Moines experiencing its coldest April and coldest May on record and statewide snowfalls occurring well into May. This sudden shift was likely caused by the powerful eruption of the volcano Ksudach in eastern Russia in late March of 1907, which threw ash high into the atmosphere partially blocking incoming sunlight for several months. Temperatures plunged during the first week of April and the month ended with a winter storm on the 28th-30th. The storm began late on the 28th with freezing rain and sleet in the north and rain elsewhere, then the precipitation gradually changed over through freezing rain and sleet to snow across southern and eastern Iowa late on the 29th with the snow ending early on the morning of the 30th. The warm weather earlier in the spring had resulted in an early growth of crops and vegetation, maximizing damage from the cold temperatures and ice at the end of April. At Des Moines an amazing 8.0 inches of snow fell in less than 24 hours on the 29th-30th. At Mount Ayr freezing rain produced a sheet of ice a quarter of an inch thick on all surfaces which was then covered with 5.0 inches of snow. At Leon an inch of snow fell with substantial damage to fruit trees under a thick glaze of ice. At Olin 5 or 6 inches of snow fell and snow banks were still observed on the north sides of buildings at sunset on May 3rd. To put into perspective the extreme nature of this event, the storm total snowfall of 8.0 inches at Des Moines is by far the highest on record for that location so late in the spring, with the next-highest amounts being 1.2 inches which fell just a few days later in 1907, and 1.0 inches which fell on April 30th, 1960. In fact, only once has a higher snowfall amount ever been recorded anywhere in the state on a later date, and that was the unbelievable storm of May 28, 1947 (highest amount 10.0 inches at Le Mars).

This Day in National/World Weather History …
 29 April 1909 → A huge tornado outbreak with many powerful storms (including four F4 tornadoes) struck from Illinois to Alabama. One tornado family was on the ground for much of its 125 mile long path from DeSoto County, MS to Decatur County, TN and produced F4 damage. Near Bolivar, TN a man fled to his brother’s house for safety. The man’s own house was untouched but his brother’s home was destroyed, killing the man. Northeast of Scotts Hill, TN a smokehouse was destroyed with the meat later found two miles away.
 29 April 1912 → The Philippines’ hottest temperature was attained at Tuguegarao with 108 degrees.
 29 April 1942 → Three entire families were killed near Oberlin, KS by an F5 tornado. Several inches of top soil were swept away from the farms. The death total was 15 and 25 were injured. The tornado dissipated near Cedar Bluff, KS.
 29 April 1995 → Severe thunderstorms moved across Tarrant County in Texas. Hail up to 3.5 inches in diameter did an enormous amount of damage. 100 aircraft were damaged at DFW airport. Damages in the county totaled $220 million. This was the second major hailstorm to hit the area in a month.
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Posted under Weather History

This post was written by Schnack on April 29, 2013