Funnel Cloud

Early this afternoon, around 2 pm, we started getting reports of a funnel cloud and photos followed shortly after. The location was near La Porte City. The atmosphere was not favorable for a tornado to form where reports of the funnel cloud were. The image below shows a few rain showers near Grundy Center and any storms were well southwest of that. The funnel cloud was not associated with a thunderstorm. A few have asked why the warning sirens were not sounded.  The reason is because there was no threat of this becoming a tornado.

State Satellite Radar

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Posted under Severe Weather

This post was written by Schnack on July 27, 2015

Minnesota Tornado Friday Night

UPDATE

NWS DAMAGE SURVEY FOR 07/17/2015 TORNADO EVENT...

EF-1 TORNADO OCCURRED WEST OF WATERTOWN IN CARVER COUNTY
MINNESOTA...

A LINE OF SEVERE THUNDERSTORMS TRACKED EAST ACROSS MOST OF CENTRAL
MINNESOTA DURING THE LATE EVENING OF JULY 17TH. A TORNADO
DEVELOPED ON THE LEADING EDGE OF THIS LINE AND IMPACTED PORTIONS
OF NORTHERN CARVER COUNTY. NWS DUAL POL RADAR OBSERVED TORNADIC
DEBRIS...AND A DAMAGE SURVEY CONFIRMED A 4.3 MILE LONG TORNADO. 

RATING: EF-1
ESTIMATED PEAK WIND: 105 MPH 
PATH LENGTH /STATUTE/: 4.3 MILES
PATH WIDTH /MAXIMUM/: 500 YARDS 
FATALITIES: 0 
INJURIES: 0

START DATE: JULY 17 2015
START TIME: 1158 PM CDT
START LOCATION: HIGHWAY 33 AND 30TH STREET... 3N HOLLYWOOD
START LAT/LON: 44.9488/-93.9715

END DATE: JULY 18 2015
END TIME: 1202 AM CDT
END LOCATION: NORTH OF ROSE AVENUE AND COUNTY 122... 2WSW
WATERTOWN
END_LAT/LON: 44.9532/-93.8846

SURVEY_SUMMARY: TORNADO SPUN UP 3 MILES NORTH OF HOLLYWOOD AND
CONTINUED EAST NORTHEAST TO 2 MILES WEST SOUTHWEST OF WATERTOWN.
THE MOST DAMAGE OCCURRED AS THE TORNADO CROSSED VEGA AVENUE WHERE
NUMEROUS TREES WERE SNAPPED AND SOME MINOR STRUCTURAL DAMAGE WAS
FOUND. THERE...A HOME WEATHER STATION RECORDED A 99 MPH WIND
BEFORE IT BLEW OFF THE HOUSE. THE WEATHER STATION REPORT...IN
ADDITION TO THE DEGREE OF TREE DAMAGE...SUPPORTS AN ESTIMATED
MAXIMUM WIND SPEED OF 105 MPH.

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*

There are reports of cars flipped, structural damage, and large trees down about 4 miles west southwest of Watertown in Carver County, MN. Radar observed a tornado in this area for 2 to 3 minutes around midnight. Looking at different modes of the radar data can tell us many things about what is happening. The image below is a good example of that.
1

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Posted under Educational, Severe Weather

This post was written by Schnack on July 18, 2015

More Confirmed Tornadoes

...NWS DAMAGE SURVEY FOR 07/16/15 TORNADO EVENT - UPDATE #2...


.TORNADO 1 ...SWEDESBURG...IA...

RATING:                 EF-0
ESTIMATED PEAK WIND:    75 MPH
PATH LENGTH /STATUTE/:  1.9 MILES
PATH WIDTH /MAXIMUM/:   25 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUL 16 2015
START TIME:             507 PM CDT
START LOCATION:         2.8 MILES E TRENTON / HENRY / IA
START LAT/LON:          41.0649 / -91.5842

END DATE:               JUL 16 2015
END TIME:               512 PM CDT
END LOCATION:           2.1 MILES S SWEDESBURG / HENRY / IA
END LAT/LON:            41.0736 / -91.5507


.TORNADO 2 ...PORT BYRON...IL...

RATING:                 EF-1
ESTIMATED PEAK WIND:    105 MPH
PATH LENGTH /STATUTE/:  1.2 MILES
PATH WIDTH /MAXIMUM/:   200 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JULY 16 2015
START TIME:             700 PM CDT
START LOCATION:         0.8 NE PORT BYRON / ROCK ISLAND / IL
START LAT/LON:          41.6150 / -90.3226

END DATE:               JULY 16 2015
END TIME:               710 PM CDT
END LOCATION:           2 NE PORT BYRON / ROCK ISLAND / IL
END LAT/LON:            41.6252 /-90.3061

DAMAGE PRIMARLIY TO LARGE TREES THAT WERE UPROOTED OR HAD SNAPPED
TRUNKS. SEVERAL HOUSES WERE DAMAGED WITH PORTIONS OF THEIR ROOF
TORN OFF AND DAMAGE TO SIDING.


.TORNADO 3 ...CAMERON...IL...

RATING:                 EF-2
ESTIMATED PEAK WIND:    125 MPH 
PATH LENGTH /STATUTE/:  8.2 MILES 
PATH WIDTH /MAXIMUM/:   700 YARDS 
FATALITIES:             0 
INJURIES:               0

START DATE:             JULY 16 2015
START TIME:             713 PM CDT
START LOCATION:         1 MILE SE MONMOUTH / WARREN / IL
START LAT/LON:          40.8868 / -90.6320

END DATE:               JULY 16 2015
END TIME:               734 PM CDT
END LOCATION:           2.2 MILES E CAMERON / WARREN / IL
END LAT/LON:            40.8924 / -90.4747



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

NOTE:
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS
STORM DATA.
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Posted under Severe Weather

This post was written by Schnack on July 17, 2015

EF-0 Tornado Thursday Evening

NWS DAMAGE SURVEY FOR 07/16/15 TORNADO EVENT-UPDATE #1  
   
RURAL MITCHELL COUNTY TORNADO  
  
   
OVERVIEW  
A BRIEF TORNADO OCCURRED WITH A LINE OF THUNDERSTORMS  
THURSDAY EVENING SOUTHWEST OF OSAGE IA IN RURAL MITCHELL COUNTY.   
   
TORNADO #1  
  
RATING:                 EF-0  
ESTIMATED PEAK WIND:    83 MPH  
PATH LENGTH /STATUTE/:  2.1 MILES  
PATH WIDTH /MAXIMUM/:   40 YARDS  
FATALITIES:             0  
INJURIES:               0  
  
START DATE:             JUL 16 2015   
START TIME:             834 PM CDT  
START LOCATION:         OSAGE 6SW  
START LAT/LON:          43.2575 / -92.9408   
  
END DATE:               JUL 16 2015  
END TIME:               836 PM CDT  
END LOCATION:           OSAGE 4SW  
END LAT/LON:            43.2719 / -92.9047  
  
SURVEY SUMMARY: THREE FARMSTEADS WERE DAMAGED ALONG A 2.1 MILE PATH   
SOUTHWEST OF OSAGE IA. A GARAGE WAS FLIPPED AND DAMAGED. A BARN WAS  
DESTROYED AND SIDING ON A HOME WAS DAMAGED DUE TO FLYING DEBRIS.   
IN ADDITION...MULTIPLE TREES WERE UPROOTED OR SNAPPED AND SOME POWER  
LINES WERE DOWNED. CROP DAMAGE ALSO OCCURRED ALONG THE TORNADO PATH.  
STORM DAMAGE ASSESSMENT WAS PERFORMED BY MITCHELL COUNTY EMERGENCY   
MANAGER.     
  
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  
  
NOTE:  
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN  
NWS STORM DATA.   
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Posted under Severe Weather

This post was written by Schnack on July 17, 2015

Storms Were Close

Widespread storms  last night developed in Minnesota and moved southeast through Wisconsin to Indiana. A few isolated storms caught eastern Iowa. Here is the radar estimate on the rain total from those storms.

KWWL 2015 MAX Storm ED

In addition to that, here is a look at all of the storm reports. A majority of them were wind reports.

1

 

Click here for a detailed list of the reports.

Here was the upper level flow Sunday evening.
1

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Posted under Severe Weather

This post was written by Schnack on July 13, 2015

More Rain and Possible Severe Storms

We are tracking the potential for more severe storms tomorrow…particularly Wednesday night. A stray shower is possible this afternoon/evening otherwise a lot of sunshine continues.

There is a chance for a few showers/storms to move into eastern Iowa, south of Cedar Rapids, late tonight into early Wednesday morning. A few showers or a stray storm are possible in the afternoon. At this point, these storms don’t appear to be severe.

The best chance of storms and severe weather will be Wednesday night. Right now the timing for the severe storms would be between 7 pm and 3 AM. Large hail, damaging wind and heavy rain would be the primary threat. Isolated tornadoes are possible, but chances are low.

Here is the Storm Prediction Center Outlook for Wednesday/Wednesday night.
KWWL 2015 MAX Storm ED
As mentioned above, some of these storms will have the potential to drop some heavy rain in a short period of time. Here is the rain potential through Thursday evening.

 

4

Due to the heavy rain possible south of Highway 20 with these storms, there is a FLASH FLOOD WATCH in effect Wednesday afternoon into Thursday morning.
Flash Flood Watch

 

 

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Posted under Severe Weather, Update

This post was written by Schnack on June 23, 2015

1st Photographed Tornado in Iowa

On May 30, 1899  the first photographed tornado in Iowa taken.
May 30 1899 Tornado

Click here for a detailed account on what happened that day.

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Posted under Severe Weather, Weather History

This post was written by Schnack on May 31, 2015

Zwingle Tornado May 26

Upon more assessment of the radar data in Zwingle, the National Weather Service has said there was a tornado during the morning of May 26th. It has been rated and EF-1.

4

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Posted under Severe Weather

This post was written by Schnack on May 28, 2015

Lake City Tornado EF-1

1

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Posted under Severe Weather

This post was written by Schnack on May 11, 2015

Lake City Tornado (Sunday May 10, 2015)


Most of the day Iowa remained tornado free until Sunday evening when a tornado ripped through Lake City. Here is the velocity image, from radar, showing where the tornado was and some of the photos of the tornado.

1Viewer Photo 3

Viewer Photo 13

The town was hit by the tornado taking the roof off Southern Cal. High School and damaging other buildings.  Viewer Photo 2  Viewer Photo 4

Image below from Amber Osterkamp
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Approximately 0ne hour later, Lake City was hit with another storm producing baseball size hail.

The map below shows where the tornado reports were on Sunday across the nation.
KWWL 2015 MAX Storm ED

Here are the tornado reports from Iowa Sunday.
3

 

 

 

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Posted under Severe Weather

This post was written by Schnack on May 10, 2015