Confirmed Tornadoes from Tuesday

Several tornadoes touched down across Iowa on Tuesday as a strong cold front tracked through a warm and very humid airmass.

 

Four were confirmed in the KWWL viewing area…. near Tama, Clutier, Blairstown and southeast of Janesville.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Posted under Severe Weather

This post was written by Eileen Loan on October 10, 2018

EF-0 Tornado and Record Rain

A brief tornado touched down south of town (Mechanicsville) Tuesday afternoon. Two grain bins were damaged and some corn.

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

You are probably are not going to be surprised to read this, but it has been the wettest month on record. Not just for the September, but for any month on record in Waterloo. The 1.14″ of rain that fell today pushed us from 4th place to the #1 spot.

Here is the break down through the 25th on how much rain fell on what day at Waterloo.

Here are other monthly totals:
Cedar Rapids 6.36″
Dubuque 8.22″
Iowa City 6.85″

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Posted under Precipitation Totals, Records, Severe Weather

This post was written by Schnack on September 25, 2018

Cedar Rapids Tornado Update

NW SIDE OF CEDAR RAPIDS, IA...

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  2.2 MILES
PATH WIDTH /MAXIMUM/:   30 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             908 PM CDT
START LOCATION:         NW SIDE OF CEDAR RAPIDS / LINN COUNTY / IA
START LAT/LON:          41.9709 N / -91.7393 W

END DATE:               SEP 03 2018
END TIME:               914 PM CDT
END LOCATION:           NW SIDE OF CEDAR RAPIDS / LINN COUNTY / IA
END LAT/LON:            41.9934 N / -91.7096 W

SURVEY SUMMARY: A TORNADO TOUCHED DOWN NEAR THE INTERSECTION OF
SKYLINE DR. NW AND MEADOWLARK LANE NW NORTHWEST PORTION OF CEDAR 
RAPIDS, AROUND 908 PM MONDAY EVENING. THE TORNADO MOVED NORTHEAST
THROUGH RESIDENTIAL NEIGHBORHOODS. THE TORNADO DESTROYED A 
GARAGE, UPROOTED AND SNAPPED LARGE TREES AND POWER POLES, AND 
CAUSED MINOR DAMAGE TO ROOFS. THE TORNADO LIFTED NEAR THE 
INTERSECTION OF 29TH ST. NW AND Q AVE. NW AROUND 914 PM. THE 
STORM ALSO CAUSED STRAIGHT LINE WIND DAMAGE AT A BUSINESS NEAR THE
INTERSECTION OF COLLINS ROAD NE AND I-380. WINDS ESTIMATED AROUND
80 MPH CAUSED A PARTIAL COLLAPSE OF A METAL POLE BARN.

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 September 7, 2018

2018 Iowa Tornadoes (Through September 7)

It has been an active year for tornadoes across the state of Iowa.  Through September 7, 2018, National Weather Service in Des Moines reports 47 tornadoes touching down across the state.

But how does this compare to average?  We are a little ahead.  Take a look at the graphic below, it shows the number of confirmed tornadoes from 1980 through 2017 (a 28 year period, including 1980).  If you average the number of tornadoes (1,772) out, we get an average of 47 per year.  So, we are ahead in the number of tornadoes for the year.

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Posted under Climate, Severe Weather

This post was written by Kyle Kiel on September 7, 2018

4 Tornadoes Monday


.TORNADO #1 - WEST SIDE OF CEDAR RAPIDS, IA...

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  1.4 MILES
PATH WIDTH /MAXIMUM/:   30 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             907 PM CDT
START LOCATION:         WEST SIDE OF CEDAR RAPIDS / LINN COUNTY / IA
START LAT/LON:          41.9787 N / -91.7281 W

END DATE:               SEP 03 2018
END TIME:               910 PM CDT
END LOCATION:           WEST SIDE OF CEDAR RAPIDS / LINN COUNTY / IA
END LAT/LON:            41.9934 N / -91.7096 W

SURVEY SUMMARY: A TORNADO TOUCHED DOWN NEAR E AVE. NW IN THE 
NORTHWEST PORTION OF CEDAR RAPIDS, AROUND 907 PM MONDAY EVENING. 
THE TORNADO MOVED NORTHEAST THROUGH RESIDENTIAL NEIGHBORHOODS. 
THE TORNADO DESTROYED A GARAGE, UPROOTED AND SNAPPED LARGE TREES 
AND POWER POLES, AND CAUSED MINOR DAMAGE TO ROOFS. THE TORNADO 
LIFTED NEAR THE INTERSECTION OF 29TH ST. NW AND Q AVE. NW AROUND 
910 PM. THE STORM ALSO CAUSED STRAIGHT LINE WIND DAMAGE AT A 
BUSINESS NEAR THE INTERSECTION OF COLLINS ROAD NE AND I-380. 
WINDS ESTIMATED AROUND 80 MPH CAUSED A PARTIAL COLLAPSE OF A 
METAL POLE BARN.


.TORNADO #2 - 2 NW ALBURNETT, IA...

RATING:                 EF-1
ESTIMATED PEAK WIND:    110 MPH
PATH LENGTH /STATUTE/:  2.5 MILES
PATH WIDTH /MAXIMUM/:   100 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             529 PM CDT
START LOCATION:         2.6 WNW ALBURNETT / LINN COUNTY / IA
START LAT/LON:          42.1721 N / -91.6619 W

END DATE:               SEP 03 2018
END TIME:               536 PM CDT
END LOCATION:           1.2 NNE ALBURNETT / LINN COUNTY / IA
END LAT/LON:            42.1716 N / -91.6132 W

SURVEY SUMMARY: AN EF1 TORNADO TOUCHED DOWN NORTH OF ALBURNETT, IA
DAMAGING MOSTLY TREES, CROPS, AND SOME SIDING ON ONE HOUSE.


.TORNADO #3 - 4 SSW VINTON, IA...

RATING:                 EF-0
ESTIMATED PEAK WIND:    80 MPH
PATH LENGTH /STATUTE/:  0.01 MILES
PATH WIDTH /MAXIMUM/:   20 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             440 PM CDT
START LOCATION:         4 SSW VINTON / BENTON COUNTY / IA
START LAT/LON:          42.0913 N / -92.0572 W

END DATE:               SEP 03 2018
END TIME:               440 PM CDT
END LOCATION:           4 SSW VINTON / BENTON COUNTY / IA
END LAT/LON:            42.0913 N / -92.0572 W

SURVEY SUMMARY: AN EF0 TORNADO WAS OBSERVED BY A STORM SPOTTER 
ABOUT 4 MILES SOUTH SOUTHWEST OF VINTON. THE TORNADO BRIEFLY 
TOUCHED DOWN WITH NO VISIBLE DAMAGE.


.TORNADO #4 - 4 SSE VINTON, IA...

RATING:                 EF-0
ESTIMATED PEAK WIND:    80 MPH
PATH LENGTH /STATUTE/:  0.01 MILES
PATH WIDTH /MAXIMUM/:   20 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             446 PM CDT
START LOCATION:         4 SSE VINTON / BENTON COUNTY / IA
START LAT/LON:          42.1087 N / -92.0093 W

END DATE:               SEP 03 2018
END TIME:               446 PM CDT 
END LOCATION:           4 SSE VINTON / BENTON COUNTY / IA 
END LAT/LON:            42.1087 N / -92.0093 W

SURVEY SUMMARY: AN EF0 TORNADO WAS OBSERVED BY EMERGENCY MANAGEMENT
NEAR THE INTERSECTION OF 63RD STREET AND 25TH AVE SOUTH OF VINTON. 
THE TORNADO BRIEFLY TOUCHED DOWN WITH NO VISIBLE DAMAGE.


EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE
FOLLOWING CATEGORIES BASED ON THE DAMAGE THEY CAUSE.

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

...NWS DAMAGE SURVEY FOR 09/03/18 TORNADO EVENTS...  .TORNADO #1 - WEST SIDE OF CEDAR RAPIDS, IA... RATING: EF-1 ESTIMATED PEAK WIND: 100 MPH PATH LENGTH /STATUTE/: 1.4 MILES PATH WIDTH /MAXIMUM/: 30 YARDS FATALITIES: 0 INJURIES: 0 START DATE: SEP 03 2018 START TIME: 907 PM CDT START LOCATION: WEST SIDE OF CEDAR RAPIDS / LINN COUNTY / IA START LAT/LON: 41.9787 N / -91.7281 W END DATE: SEP 03 2018 END TIME: 910 PM CDT END LOCATION: WEST SIDE OF CEDAR RAPIDS / LINN COUNTY / IA END LAT/LON: 41.9934 N / -91.7096 W SURVEY SUMMARY: A TORNADO TOUCHED DOWN NEAR E AVE. NW IN THE NORTHWEST PORTION OF CEDAR RAPIDS, AROUND 907 PM MONDAY EVENING. THE TORNADO MOVED NORTHEAST THROUGH RESIDENTIAL NEIGHBORHOODS. THE TORNADO DESTROYED A GARAGE, UPROOTED AND SNAPPED LARGE TREES AND POWER POLES, AND CAUSED MINOR DAMAGE TO ROOFS. THE TORNADO LIFTED NEAR THE INTERSECTION OF 29TH ST. NW AND Q AVE. NW AROUND 910 PM. THE STORM ALSO CAUSED STRAIGHT LINE WIND DAMAGE AT A BUSINESS NEAR THE INTERSECTION OF COLLINS ROAD NE AND I-380. WINDS ESTIMATED AROUND 80 MPH CAUSED A PARTIAL COLLAPSE OF A METAL POLE BARN.  .TORNADO #2 was 2 MI NW ALBURNETT, IA... RATING: EF-1 ESTIMATED PEAK WIND: 110 MPH PATH LENGTH /STATUTE/: 2.5 MILES PATH WIDTH /MAXIMUM/: 100 YARDS FATALITIES: 0 INJURIES: 0 START DATE: SEP 03 2018 START TIME: 529 PM CDT START LOCATION: 2.6 WNW ALBURNETT / LINN COUNTY / IA START LAT/LON: 42.1721 N / -91.6619 W END DATE: SEP 03 2018 END TIME: 536 PM CDT END LOCATION: 1.2 NNE ALBURNETT / LINN COUNTY / IA END LAT/LON: 42.1716 N / -91.6132 W SURVEY SUMMARY: AN EF1 TORNADO TOUCHED DOWN NORTH OF ALBURNETT, IA DAMAGING MOSTLY TREES, CROPS, AND SOME SIDING ON ONE HOUSE.  .TORNADO #3 - 4 MI SSE VINTON, IA... RATING: EF-0 ESTIMATED PEAK WIND: 80 MPH PATH LENGTH /STATUTE/: 0.01 MILES PATH WIDTH /MAXIMUM/: 20 YARDS FATALITIES: 0 INJURIES: 0 START DATE: SEP 03 2018 START TIME: 440 PM CDT START LOCATION: 4 SSE VINTON / BENTON COUNTY / IA START LAT/LON: 42.1087 N / -92.0093 W END DATE: SEP 03 2018 END TIME: 440 PM CDT END LOCATION: 4 SSE VINTON / BENTON COUNTY / IA END LAT/LON: 42.1087 N / -92.0093 W SURVEY SUMMARY: AN EF0 TORNADO WAS OBSERVED BY EMERGENCY MANAGEMENT NEAR THE INTERSECTION OF 63RD STREET AND 25TH AVE SOUTH OF VINTON. THE TORNADO BRIEFLY TOUCHED DOWN WITH NO VISIBLE DAMAGE.

TORNADO #4 - 4 SSE VINTON, IA...

RATING:                 EF-0
ESTIMATED PEAK WIND:    80 MPH
PATH LENGTH /STATUTE/:  0.01 MILES
PATH WIDTH /MAXIMUM/:   20 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             SEP 03 2018
START TIME:             446 PM CDT
START LOCATION:         4 SSE VINTON / BENTON COUNTY / IA
START LAT/LON:          42.1087 N / -92.0093 W

END DATE:               SEP 03 2018
END TIME:               446 PM CDT 
END LOCATION:           4 SSE VINTON / BENTON COUNTY / IA 
END LAT/LON:            42.1087 N / -92.0093 W

SURVEY SUMMARY: AN EF0 TORNADO WAS OBSERVED BY EMERGENCY MANAGEMENT
NEAR THE INTERSECTION OF 63RD STREET AND 25TH AVE SOUTH OF VINTON. 
THE TORNADO BRIEFLY TOUCHED DOWN WITH NO VISIBLE DAMAGE.
EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES BASED ON THE DAMAGE THEY CAUSE. 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 September 4, 2018

Stormy Tuesday

Here are some of the wind reports across southeast Iowa during the evening.

Storms Tuesday morning produced very large hail across northern Iowa. This is hail from just west of Eldorado. It happened just before 10:30. (Credit: Shannon Langreck)

 

Heavy rain in a short time flooded part of Kinnick Stadium in Iowa City Tuesday evening. (Credit: @letsgohawks12)

After the storm.

Credit: Steve Kofron

Lightning near Springville at 7pm (Credit: Emma Fuller)

Cedar Falls (Credit: Samajda Hasic‎)

Shelf cloud northeast side of Iowa City as the storm approached. (Credit: Scott Steele)

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Posted under Severe Weather

This post was written by Schnack on August 28, 2018

EF-0 Tornado Monday Afternoon.

The National Weather Service has confirmed that an EF-0 touched down two miles east of Delmar Monday afternoon. The tornado touched down at 3:49 PM and stayed on the ground for two minutes. The path was a half mile long and 15 yards wide.  Peak winds were estimated to be 65 mph and damage was mainly to soybeans and trees.

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Posted under NOAA, Severe Weather

This post was written by Schnack on August 21, 2018

Tornado Confirmed in Eastern Iowa Thursday Evening

The National Weather Service in the Quad Cities confirms at least one tornado touched down in eastern Iowa Thursday evening.

Six firefighters in Oxford Junction saw the tornado touch down on the west side of town.  There was damage to pipe and shingles on a structure.

A Tornado Warning was issued by the National Weather Service at 6:07 PM, with the touchdown being seen in Oxford Junction at 6:08 PM.

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Posted under Severe Weather

This post was written by Kyle Kiel on August 16, 2018

F4 Tornadoes in Eastern Iowa – 8/12/1974

Two damaging tornadoes tracked through eastern Iowa on August 12, 1974 casing major damage and several injuries.

The first tornado moved through the southern end of Ryan in Delaware County.  The tornado was an F4, damaging or destroying several dozen homes.  Two business were also hit hard, along with a school and Saint Patrick’s Church in town.  According to the National Weather Service Des Moines, the church and 20 other businesses were destroyed.  There were 12 injuries in Ryan.

 

Another tornado touched down in Iowa County, near Ladora.  Two people were injured, and the tornado swept away a farm house.  The Ladora tornado was also an F4.

The Fujita Scale (F-Scale) was retired in 2007, and replaced by the Enhanced Fujita Scale.  The F-Scale was based on the damage from the tornado.  Enhance Fujita Scale also takes into account the damage, but the ratings are put in line with coinciding wind speeds with the damage.  All based on estimates.

Below is the surface and upper air map from that day at 6 AM Iowa time.  You can see a cold front approaching from the northwest, and a dip in the 500 mb jet stream.

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Posted under Severe Weather, Weather History

This post was written by Kyle Kiel on August 12, 2018

July 19 Tornado Outbreak

The National Weather Service has now confirmed 15 tornadoes have occurred on July 19, 2018 in Iowa. Here is a break down on the ratings.

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

Below is the official path the Marshalltown tornado took according the the National Weather Service:

 

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Posted under Severe Weather

This post was written by Schnack on August 2, 2018