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.

 

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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.

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Posted under Severe Weather

This post was written by Schnack on May 28, 2015

Lake City Tornado EF-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.
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Posted under Severe Weather

This post was written by Schnack on May 10, 2015

Mother’s Day Severe Weather Update

Threat TrackerDay 1 SPC

The warm front that was suppose to track through most of the area overnight stalled south of the viewing area. This limited development of storms overnight. The low also tracked farther west. The risk for severe weather has been downgraded for eastern Iowa but there is still a slight risk for severe storms.
FT 1
Sunshine is started to show up in eastern Nebraska and western Iowa. This will be the area of main concern for severe storm development this afternoon. Storms could develop around the noon hour and later in western Iowa. Our severe weather threat will be dependent on what happens in south central Iowa and northern Missouri. Below are the current timing of storms through FutureTrack.

FT 2FT 3

Our best chance of severe storms will be after 4 PM and most of them should track through after 6 PM if they can develop. The main threats will be large hail, damaging winds and heavy rain in our viewing area. The tornado threat will be highest in western Iowa. Be sure to stay with KWWL throughout the day and tonight for the latest severe weather information.

 

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Posted under Forecast Discussion, Severe Weather

This post was written by Denice Pelster on May 10, 2015

Severe Weather Forecast for Mother’s Day

Threat Tracker

A low pressure system will be tracking into the upper Midwest today. It will bring along a warm front that will track into the area tonight. A few showers/storms are possible late tonight, especially after 3 AM.

FT 1

These storms are not expected to be severe but an isolated severe storm producing large hail and damaging winds cannot be ruled out. Rainfall totals with this first round will be around a tenth of an inch to maybe an inch.

The second round of storms will hold the greatest threat for severe weather. Current thinking is that sunshine will allow storms to pop up around 2 PM in central Iowa. These storms will then track into our viewing area around 4 PM into the evening.

FT 2FT 3

The main threats with any severe storms will be heavy rain, large hail and damaging winds. A tornado threat is also possible with any individual cells. The Storm Prediction Center in Oklahoma has put most of the viewing area in an Enhanced Risk for severe weather. Areas outside of the Enhanced Risk, like Dubuque & Decorah, still have a risk for severe weather. The threat for tornadoes will be lower in the slight risk.

Day 2 SPC

 

The severe weather threat will diminish after midnight with just a few showers or storms tracking through Monday. Rainfall totals by Monday morning could be over an inch in many locations.

FT 4

Note: there are still a lot of factors to consider with the severe weather outlook. If the rain Sunday morning stays longer than predicted, the severe weather threat will be much lower. Timing will also depend on how fast the low tracks northeast and what time we start to see sunny skies. Be sure to stay up to date on the forecast throughout the rest of the weekend and into Mother’s Day.

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Posted under Forecast Discussion, Severe Weather

This post was written by Denice Pelster on May 9, 2015

April 9, 2015 Northern Illinois Tornado Track

This is the path of the tornado from north east of Fairdale, IL to 1 mile north east of Franklin Grove

NWS METEOROLOGISTS HAVE CONDUCTED A GROUND SURVEY COVERING THE MOST   
HEAVILY DAMAGED LOCATIONS. BASED ON EARLY FINDINGS THE TORNADO THAT   
TRACKED FROM NEAR ROCHELLE TO NEAR BELVIDERE...AND IMPACTED THE   
COMMUNITY OF FAIRDALE...APPEARS TO HAVE BEEN A SINGLE LONG TRACK   
TORNADO. PRELIMINARY SURVEY ASSESSMENT INDICATES THIS TORNADO   
WAS AN EF-4. AN AERIAL SURVEY WILL BE CONDUCTED  
TOMORROW...WEATHER PERMITTING...TO CONFIRM A FINAL RATING.   
  
AT LEAST ONE SATELLITE TORNADO ASSOCIATED WITH THIS LARGER TORNADO  
WAS FOUND THUS FAR AND THERE MAY HAVE BEEN OTHERS.  AN AERIAL   
SURVEY WILL HELP US ASCERTAIN WHETHER THERE WERE ANY ADDITIONAL   
TORNADOES ON THIS DAY.  
   
RATING:                 EF-4 (PRELIMINARY)  
ESTIMATED PEAK WIND:    180-200 MPH  
PATH LENGTH /STATUTE/:  TBD  
PATH WIDTH /MAXIMUM/:   0.5 MILE (PRELIMINARY)  
FATALITIES:             2  
INJURIES:               22  
  
START DATE:APRIL 09 2015  
START TIME:TBD  
START LOCATION:TBD  
  
END DATE:APRIL 09 2015  
END TIME:TBD  
END LOCATION:TBD  

All of the images below were taken northeast of Rochelle and into the town of Fairdale, IL.

All photos below were taken by Victor Gensini. You can follow him on Twitter.

 

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Posted under Severe Weather

This post was written by Schnack on April 10, 2015

DAMAGE SURVEY RESULTS FOR 04/09/15 TORNADOES

TORNADO #1

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  22 MILES
PATH WIDTH /MAXIMUM/:   100 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             04/09/2015 
START TIME:             5:04 PM CDT
START LOCATION:         8 MILES WEST OF MAYSVILLE IOWA 
START LAT/LON:          41.6510/-90.8766

END DATE:               04/09/2015
END TIME:               5:30 PM CDT
END LOCATION:           2 MILES SOUTH OF DEWITT IOWA
END LAT/LON:            41.7966/-90.5384

STORM SURVEY REVEALED DAMAGE PRIMARILY TO FARM OUTBUILDINGS AND TREES.

TORNADO #2

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  13 MILES
PATH WIDTH /MAXIMUM/:   75 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             04/09/2015 
START TIME:             5:40 PM CDT
START LOCATION:         1 MILE SOUTHEAST OF CLINTON AIRPORT
START LAT/LON:          41.8152/-90.0644

END DATE:               04/09/2015
END TIME:               6:00 PM CDT
END LOCATION:           5 MILES NORTHEAST OF FULTON IL
END LAT/LON:            41.9154/-90.0644

STORM SURVEY REVEALED DAMAGE PRIMARILY TO FARM OUTBUILDINGS AND TREES.

Click here for the National Weather Service summary.

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Posted under Severe Weather

This post was written by Schnack on April 10, 2015

Tornadoes in January…in Iowa

From the NWS:

On This Day in Iowa Weather History

January 24

1967: An unprecedented January tornado outbreak struck eastern and southeastern Iowa and portions of Missouri, Illinois, and Wisconsin. There were at least 13 tornadoes in Iowa with many of these producing significant F2 or F3 damage. Two tornadoes struck Lee County resulting in 10 injuries, and one of those tornadoes produced F3 damage and killed a young child just west of Fort Madison. Another tornado produced F4 damage just across the border in northeastern Missouri before entering Davis County. A cold front moved through the state later that night and on the 26th snow fell across about the southern half of Iowa with snowfall amounts ranging up to 13.5 inches at Burlington, less than two days after tornadoes had touched down in the same area. To put the extremely unusual nature of this outbreak into perspective, this is the only date in January on which a tornado has ever been recorded in Iowa and only one has ever been recorded in February.

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Posted under Severe Weather, Weather History

This post was written by Schnack on January 24, 2015