ICYMI Sept 19…Antisolar Rays & Belt of Venus /90° Days/Baseball Sized Hail

Severe storms were in the forecast for this afternoon and evening, but little to nothing materialized. The reason for that is because of what is called a CAP. This is small layer of the atmosphere that is warmer and it prevented the air from rising quickly.

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The high temperature today was 89 degrees in Cedar Rapids. I went back and looked to see how often does a high temperature of 90 degrees get reached in September at Cedar Rapids. Well, on this date is has done eight times. The chart below shows the calendar day at the bottom and temperature on the left. Each bar shows the number of days the temperature reached 90 or higher on that particular day. So again, on the 19th it was 90 or warmer 8 times on that day. Notice how fast the frequency drops off toward the end of the month…not very often.
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Here is a look at how much rain has fallen so far this month across Iowa.
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There is a great web page very interesting photos and descriptions of why things look the way they do. Les Cowley puts off of this information on the web page. There is a section called Optics Picture of the Day. I learn something new every time I go the web page. The photo is just one example of some great photos on there. Here is the link.
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On September 18, 2002 a storm producing baseball size hail with wind gusts to 70-80 mph in Jackson County. Click here for more details on this event.
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Posted under Optics, Precipitation Totals, Severe Weather, Temperatures

This post was written by Schnack on September 19, 2016

ICYMI- Sept 16….Comet Breaks Up/Tropics/Lightning Strikes

It’s not you, it’s me.  The breakup of a comet

hubblecometvideogifv1635a332p160831-1041

Over a three day period in January of this year, Hubble Space Telescope took pictures of a comet breaking up a mere 67 million miles from Earth.  There is still plenty of material for the comet to last another few trips around the sun, but these images are giving insight to the violent forces that can tear comets apart as they approach the sun.  One of the paragraphs from the main article (which you can read by clicking here):

The observations suggest that the roughly 4.5-billion-year-old comet, named 332P/Ikeya-Murakami, or Comet 332P, may be spinning so fast that material is ejected from its surface. The resulting debris is now scattered along a 3,000-mile-long trail, larger than the width of the continental U.S.

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Another tropical storm has formed in the Atlantic. This one is named Karl and is forecast to become a category 1 hurricane by Wednesday. The good news is that models are keeping Karl away from the US coast.

145138W5_NL_sm

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A group of experts from the World Meteorological Association released two new world records regarding lightning.  One is the longest reported distance for a single flash of lightning, and the other is for the longest duration for a single flash of lightning.  As you can see, the longest duration happened in France, and the longest distance happened in Oklahoma.

lightning

“Dramatic improvements in lightning remote sensing techniques have allowed the detection of previous unobserved extremes in lightning occurrence and so enabled the WMO committee to conduct a critical evaluation.”  View the entire article by clicking here.

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Speaking of lightning, The Des Moines Register reports a bolt of lightning struck the clock on top of the Polk County Courthouse in Des Moines around 3:50 AM Wednesday.

polk

The clock is expected to be fixed “very soon.”

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Posted under Astronomy, Severe Weather, Tropics

This post was written by Eileen Loan on September 16, 2016

Tornado Near Cresco Tuesday Evening

A strong storm was producing 40-45 mph winds in Howard County Tuesday evening. The video below also shows a short lived weak tornado.


Here is the velocity image from the radar this evening where the tornado might have been. The red area is moving away from the radar and the green is moving toward the radar. This image would indicate the tornado between Lime Springs and Cresco in the outline circle.
KWWL 2015 MAX Storm EDa

Here is a tweet from the National Weather Service in LaCrosse, WI.
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Posted under Severe Weather

This post was written by Schnack on September 6, 2016

Funnel Cloud in Waterloo

There was a funnel cloud in Waterloo this afternoon with many photos taken and this video. These type of funnel clouds typically don’t reach the ground and only drop a few hundred feet from the base of the cloud, They usually don’t last very long. This one lasted about 15-20 min.

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Posted under Severe Weather

This post was written by Schnack on August 29, 2016

Brief Tornado in Linn County Sunday

Just after 4:30 PM Sunday afternoon, there was a storm spotter report of a tornado touch down near Troy Mills in northern Linn County.  No damage was reported.  The environment was not favorable for severe weather, so the tornado did not last long, nor did it cause damage.  It developed quickly, as an isolated shower with heavy rain developed just minutes before the tornado was reported.

KWWL 2015 MAX Storm ED troy mills

The Storm Track 7 Forecast called for isolated storms to pop-up in the afternoon.  These showers and storms were what we call “pulse” showers and storms, where they build themselves up and drop heavy rain, then dissipate, then pop-up again.

Several viewers caught photos of the funnel cloud associated with this tornado.

Viewer Photo Basic 1 Vertical

Storm Pics2

eric walker

Storm Pics

Here was the view of the storm from Urbana, along I-380

Liz urbana

And, another view of the isolated storm from Walker.

Barb walker

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Posted under Photo, Severe Weather

This post was written by Kyle Kiel on August 28, 2016

August Tornadoes

Now that we changed the calendar to a new month, I thought I would show you what the average number of tornadoes is for each state in August.

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Posted under Severe Weather

This post was written by Schnack on August 3, 2016

2 Tornadoes Saturday

NWS Damage Survey Information for July 23, 2016 Tornadoes

Tornado #1 Delhi, IA

Rating:                 EF-1
Estimated peak wind:    90 mph
Path length /Statute/:  0.25 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             July 23, 2016 
Start time:             418 PM CDT
Start location:         3.5 SW Delhi / Delaware County / IA
Start Lat/Lon:          42.4108 / -91.3930

End date:               July 23, 2016
End time:               419 PM CDT
End location:           3.5 SW Delhi / Delaware County / IA
End_lat/lon:            42.4084 / -91.3908

A tornado moved across the southwest portion of Lake Delhi
resulting in downed trees along the shoreline.

Tornado #2 Worthington, IA

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  0.8 mile
Path width /Maximum/:   25 yards
Fatalities:             0
Injuries:               0

Start date:             July 23, 2016 
Start time:             443 PM
CDT Start location:     1.9 NNW Worthington / Dubuque County / IA
IA Start Lat/Lon:       42.4235 / -91.1265

End date:               July 23, 2016
End time:               445 PM
End location:           2 N Worthington / Dubuque County / IA
End_lat/lon:            42.4234 / -91.1112

A tornado damaged crops and blew off the roofing material
of several farm outbuildings.

EF Scale: The Enhanced Fujita Scale Classifies
Tornadoes into the following categories.

EF0...Weak......65 to 85 mph
EF1...Weak......86 to 110 mph
EF2...Strong....111 to 135 mph
EF3...Strong....136 to 165 mph
EF4...Violent...166 To 200 mph
EF5...Violent...>200 mph
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Posted under NOAA, Severe Weather

This post was written by Schnack on July 25, 2016

Saturday Severe Weather

It was quite a busy afternoon across eastern Iowa, mainly north of Highway 30 where we had multiple Severe Thunderstorm, Tornado, and Flash Flood Warnings Saturday afternoon.  In fact, as of Saturday night, more than 40 reports have come in to the National Weather Service.  A few reports of wind gusts estimted between 50 and 80 miles per hour in parts of Buchanan County near Independence.

KWWL 2015 MAX Storm ED

At least two tornadoes were reported, one near Worthington and one near Farley in Dubuque County.  We should get more detailed information on these reports from the National Weather Service in the next day or two.

KWWL 2015 MAX Storm ED2

Here are just a small portion of the many photos viewers sent into us today. As always, we appreciate them.

Storm Pics3

 

Viewer Photo Basic 2

Viewer Photo Basic 1

Storm Pics

Storm Pics2

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Posted under Severe Weather

This post was written by Kyle Kiel on July 23, 2016

4 Tornadoes in Iowa Sunday Morning

 

Confirmed Tornadoes on Map
NWS Damage Survey Information for July 17, 2016 Tornadoes

Tornado #1 Andrew, IA

Rating:                 EF-1
Estimated peak wind:    100 mph
Path length /Statute/:  1.0 mile
Path width /Maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start date:             July 17, 2016 
Start time:             603 AM CDT
Start location:         0.6 SW of Andrew / Jackson / IA
Start Lat/Lon:          42.1471 / -90.6023

End date:               July 17, 2016
End time:               605 AM CDT
End location:           0.4 E of Andrew / Jackson / IA
End_lat/lon:            42.1541 / -90.5853

Tornado crossed the southern parts of the town of Andrew.  
A building at the ag coop was destroyed and numerous trees 
were snapped.

Tornado #2 Park View, IA

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  1.0 mile
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             July 17, 2016 
Start time:             625 AM CDT
Start location:         1.7 SSW Parkview / Scott / IA
Start Lat/Lon:          41.6739 / -90.5489

End date:               July 17, 2016
End time:               626 AM CDT
End location:           2.0 SSE Parkview / Scott / IA
End_lat/lon:            41.6700 / -90.5295

Limbs were snapped from a tree and corn crops were damaged.

Tornado #3 Vinton, IA

Rating:                 EF-2
Estimated peak wind:    135 mph
Path length /Statute/:  1.62 mile
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               5

Start date:             July 17, 2016 
Start time:             501 AM CDT
Start location:         South side of Vinton / Benton / IA
Start Lat/Lon:          42.1531 / -92.0327

End date:               July 17, 2016
End time:               503 AM CDT
End location:           Southeast side Vinton / Benton / IA
End_lat/lon:            42.1587 / -92.0025

Tornado tracked across the southern parts of Vinton, damaging
buildings, trees, power poles, and other structures. The tornado
first damaged trees, then hit the ball field where it destroyed
fencing, the score board and a large light pole. It then tracked
across several multi-family housing buildings, where it mainly
removed the roof structures. From there the tornado intensifed
as it struck a brick apartment building, when was unroofed and
had parts of the walls blown out. The tornado then felled a cell
phone tower and apparently began to weaken as it continued across
a large field. The roofs of another eight homes were damaged as
the tornado finally exited Vinton and continued into farmland
where it dissipated.



TORNADO # 4 Walford, IA

Rating:                EF-2
Estimated peak wind:   115 MPH 
Path length /Statute/: 4 miles 
Path width /Maximum/:  75 yards
Fatalities:            0 
Injuries:              4

Start date:            July 17, 2016
Start time:            515 AM CDT 
Start location:        1.5 miles SE Norway 
Start Lat/Lon: 40.8912/-91.8966

End date:              July 17, 2016
End time:              5:21 AM CDT
End location:          0.7 miles SE Walford
End_lat/lon:           41.8767/-91.8215

A tornado touched down southeast of Norway and tracked southeast
to Walford. It damaged two farmsteads before reaching Walford.
In Walford, it damaged the roofs of several homes. One home was 
completely destroyed when it collapsed on itself, apparently aided 
by wind-blown debris. 

EF Scale: The Enhanced Fujita Scale Classifies
Tornadoes into the following categories.

EF0...Weak......65 to 85 mph
EF1...Weak......86 to 110 mph
EF2...Strong....111 to 135 mph
EF3...Strong....136 to 165 mph
EF4...Violent...166 To 200 mph
EF5...Violent...>200 mph
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Posted under Severe Weather

This post was written by Schnack on July 18, 2016

Sunday Severe Weather

Eastern Iowa saw a very active period of weather during the overnight hours Saturday into Sunday morning.  At least 21 reports of damage were reported to the National Weather Service.

storm report

Just outside our viewing area in Hardin County, an 88 mph wind gust was reported in Steamboat Rock just after 4 O’Clock in the morning.

88

Here are a few satellite and radar images as the storms tracked through eastern Iowa.

storm 1 storm 2 storm 3

The bowing segment is indicative of some very strong winds, and that was realized in many areas as the storm tracked through.

As of Sunday night, two tornadoes were confirmed in extreme eastern Iowa; Jackson County and Scott County early Sunday morning. (Click the link for details on the two tornadoes).

Confirmed Tornadoes on Map

Two areas in the KWWL viewing area that were especially hard hit are Vinton and Walford.  The National Weather Service in the Quad Cities will be sending out a team to survey those areas in Benton and Linn counties to determine whether the damage was caused by straight-line winds or a tornado.  Expect that report out sometime on Monday.

Several photos came in from KWWL viewers.  Here is a slideshow of some of those photos.

Storm damage in Vinton

   Storm damage in Vinton

grundy center evansdale

Storm damage between Raymond & Gilbertville

Storm damage between Raymond & Gilbertville

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Posted under Photo, Severe Weather

This post was written by Kyle Kiel on July 17, 2016