Busy Tornado Season so far

A busy tornado season in the US so far…since 2005. The 3rd most tornadoes through March 23 (371). Most was in 2008 with 491.

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Posted under Severe Weather

This post was written by Schnack on March 24, 2017

Large Hail Thursday

Storms moves east across Iowa Thursday afternoon with large hail. There were many reports around golf ball size and larger. Here is a map where the large hail fell.

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Posted under Photo, Severe Weather

This post was written by Schnack on March 23, 2017

13 Tornadoes Monday Evening

 

The above tornado records are from 1980-2015.

 

 

Muscatine
RATING: EF-2
ESTIMATED PEAK WIND: 115 MPH
PATH LENGTH: 1.8 MILES
PATH WIDTH /MAXIMUM: 200 YARDS
FATALITIES: 0
INJURIES: 3

 

Seymour
RATING: EF-2
ESTIMATED PEAK WIND: 115-125 MPH
PATH LENGTH: 12.6 MILES
PATH WIDTH /MAXIMUM: 200 YARDS
FATALITIES: 0
INJURIES: 3

 

South of Harcourt
RATING: EF-0
ESTIMATED PEAK WIND: 70 MPH
PATH LENGTH: 2.3 MILES
PATH WIDTH /MAXIMUM/: 30 YARDS
FATALITIES: 0
INJURIES: 0

 

North of Dayton
RATING: EF-0
ESTIMATED PEAK WIND: 70 MPH
PATH LENGTH: 1.4 MILES
PATH WIDTH /MAXIMUM/: 30 YARDS
FATALITIES: 0
INJURIES: 0

 

West of Knoxville
RATING: EF-1
ESTIMATED PEAK WIND: 90 to 100 MPH
PATH LENGTH: 0.9 MILES
PATH WIDTH /MAXIMUM/: 100 YARDS
FATALITIES: 0
INJURIES: 0

 

North of Knoxville
RATING: EF-1
ESTIMATED PEAK WIND: 85 to 95 MPH
PATH LENGTH: 1.5 MILES
PATH WIDTH /MAXIMUM/: 80 YARDS
FATALITIES: 0
INJURIES: 0

 

Centerville
RATING: EF-2
ESTIMATED PEAK WIND: 115-125 MPH
PATH LENGTH: 8.1 MILES
PATH WIDTH /MAXIMUM/: 200 YARDS
FATALITIES: 0
INJURIES: 0

 

Blue Grass/NW Davenport/Eldridge Iowa…
RATING: EF-2
ESTIMATED PEAK WIND: 120 MPH
PATH LENGTH: 25.3 MILES
PATH WIDTH /MAXIMUM/: 1,000 YARDS
FATALITIES: 0
INJURIES: 0

 

Bernard
RATING: EF-0
ESTIMATED PEAK WIND: 95 MPH
PATH LENGTH: 5.7 MILES
PATH WIDTH /MAXIMUM/: 25 YARDS
FATALITIES: 0
INJURIES: 0

 

Bennett
RATING: EF-1
ESTIMATED PEAK WIND: 110 MPH
PATH LENGTH: 16.8 MILES
PATH WIDTH /MAXIMUM/: 100 YARDS
FATALITIES: 0
INJURIES: 0

 

Low Moor
RATING: EF-1
ESTIMATED PEAK WIND: 110 MPH
PATH LENGTH: 4.36 MILES
PATH WIDTH /MAXIMUM/: 50 YARDS
FATALITIES: 0
INJURIES: 0

 

Walcott
RATING: EF-2
ESTIMATED PEAK WIND: 115 MPH
PATH LENGTH: 34.7 MILES
PATH WIDTH /MAXIMUM/: 200 YARDS
FATALITIES: 0
INJURIES: 0

 

Grandview
RATING: EF-2
ESTIMATED PEAK WIND: 115 MPH
PATH LENGTH: 0.3 MILES
PATH WIDTH /MAXIMUM/: 150 YARDS
FATALITIES: 0
INJURIES: 0

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Posted under NOAA, Severe Weather

This post was written by Schnack on March 7, 2017

TRACKING: Warm and Windy Monday with a Slight Risk for Severe Weather

Monday starts off cloudy with a few light rain showers.  It will be windy with south/southwest winds 15-30 mph, gusting as high as 40+ mph.

A cold front tracks in by late afternoon and will spark off a line of rain and thunderstorms.

There is a slight risk of severe weather, with damaging wind gusts and hail the main threats.  The threat for a tornado is low, but something we will certainly keep an eye on.  Rainfall amounts will generally be between a tenth and half inch.

 

We clear our sky out Monday night, but the wind will continue to be a big weather story as we head into Tuesday.  Gusts could once again be 40-50+ mph.

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Posted under Forecast Discussion, Severe Weather

This post was written by Kyle Kiel on March 5, 2017

Even Warmer Sunday, Breezy Again

Clouds increase today from west to east. A few areas of spotty drizzle are possible at best. A breezy south wind pulls in warmer air again today…and that continues into Monday, as well. Highs today reach the low 50s to low 60s from north to south. Overnight, a slightly better chance of scattered drizzle or light rain is possible. Mostly cloudy skies keep temperatures warm for an early March night. Overnight lows cool to between 46-50°.

A cold front tracks in from the west Monday. Showers and storms fire up ahead of it. Some of those storms could be strong… possibly severe storms. The biggest threats with any severe storms Monday afternoon would be damaging winds and hail. A tornado isn’t out of the question but is not as likely. Strong winds are possible before storms track through but they may become even stronger as the cold front gets closer. Monday will be the warmest day of the week, with highs running 20+° degrees above average for the date.

Showers and storms track out by early Tuesday morning. Windy conditions, however, linger through Tuesday. “Cooler” air also filters in for the rest of the week. What that really means is that we won’t have any more 60s, but highs remain in the upper 40s to low 50s through next weekend. Normal highs this time of year are in the low 40s.

We are watching a system that could bring another blast of winter weather back to eastern Iowa for next weekend. Don’t forget, we spring forward next Sunday morning and begin Daylight Saving Time.

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Posted under Forecast Discussion, Severe Weather, Windy

This post was written by Rachael Peart on March 5, 2017

Iowa Tornado on Last Day of February

The only known time Iowa had a tornado in February was on Feb. 23, 1977.

From NWS:  A very rare February tornado touched down briefly in Mason City inflicting F1
damage on a home and injuring one person inside. This is the only known
February tornado on record in Iowa.



TORNADO in ...FOLLETS  
  
RATING:                 EF-0  
ESTIMATED PEAK WIND:    70 MPH  
PATH LENGTH /STATUTE/:  0.04 MILES  
PATH WIDTH /MAXIMUM/:   25 YARDS  
FATALITIES:             0  
INJURIES:               0  
  
START DATE:             02/28/2017  
START TIME:             453 PM CST  
START LOCATION:         FOLLETS / CLINTON / IOWA  
START LAT/LON:          41.7558 / -90.3602  
  
END DATE:               02/28/2017  
END TIME:               453 PM CST  
END LOCATION:           0.25 NW FOLLETS / CLINTON / IOWA  
END LAT/LON:            41.756 / -90.3594  
  
CLINTON COUNTY EMERGENCY MANAGEMENT OBSERVED A BRIEF TOUCHDOWN IN A   
FIELD, WITH DUST DEBRIS NOTED. NO DAMAGE WAS OBSERVED.

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Posted under Severe Weather

This post was written by Schnack on March 1, 2017

March Tornadoes

A new month and we are closer to spring…typically a busy time year for tornadoes.

Here is a look at the monthly breakdown of how many tornadoes there have been in Iowa from 1980-2015.

The chart below shows eastern Iowa tornadoes in March from 1950-2015.

The map below shows the average number of tornadoes per month per state. Iowa has an average of two.

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Posted under Severe Weather

This post was written by Schnack on March 1, 2017

Spotter Training Schedule

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Posted under NOAA, Severe Weather

This post was written by Schnack on February 21, 2017

SPC issues “High” Severe Weather Risk

highrisk

January 22, 2017 Severe Weather Categorical Outlook

For the first time since 2014, the Storm Prediction Center has issued a “high” risk for severe weather. Areas affected include southern Georgia and northern Florida. A significant tornado outbreak is expected in those areas today after multiple tornado reports overnight Saturday into Sunday morning.

The last high risk day was on June 3, 2014 and included parts of southern Iowa – including Des Moines.  On that date, 16 tornadoes (but no casualties) were reported.

day1otlk_20140603_2000_prt

June 3, 2014 Severe Weather Categorical Outlook

The full outlook for June 3, 2014 can be found here.

This is an uncommon time of the year to have such strong storms. In fact, a high risk has not been issued in January since January 21, 1999…almost 18 years to the date. Arkansas, Mississippi and Louisiana were included in that high risk zone. That is also the earliest calendar date that a high risk has ever been issued. Reports of 99 tornadoes came during the outbreak of January 21-23, 1999. Most of those tornadoes touched down in the southern United States.

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Posted under Forecast Discussion, Severe Weather, Weather History

This post was written by Rachael Peart on January 22, 2017

4 Tornadoes Confirmed From Monday

There were multiple reports of tornadoes on Monday afternoon in eastern Iowa. A few tornadic storms formed ahead of a cold front. As of late Tuesday morning, the National Weather Service has one completed damage survey:

RADCLIFFE TORNADO (Hardin County)

RATING:                 EF-0
ESTIMATED PEAK WIND:    70-75 MPH
PATH LENGTH /STATUTE/:  1.1 MILES
PATH WIDTH /MAXIMUM/:   10 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             NOV 28 2016
START TIME:             1244 PM CST
START LOCATION:         RADCLIFFE

END DATE:               NOV 28 2016
END TIME:               1248 PM CST
END LOCATION:           1 MILE NW OF RADCLIFFE

The twister flipped a vehicle, threw a shed about 30 feet, downed trees and left a lot of roof damage.


GRUNDY CENTER TORNADO (Grundy County)

RATING:                 EF-0
ESTIMATED PEAK WIND:    70-75 MPH
PATH LENGTH /STATUTE/:  .20 MILES
PATH WIDTH /MAXIMUM/:   10 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             NOV 28 2016
START TIME:             345 PM CST
START LOCATION:         1 MILE WEST OF GRUNDY CENTER

END DATE:               NOV 28 2016
END TIME:               346 PM CST
END LOCATION:           1 MILE WEST OF GRUNDY CENTER


PARKERSBURG TORNADO (Butler County)

RATING:                 EF-0
ESTIMATED PEAK WIND:    70-75 MPH
PATH LENGTH /STATUTE/:  1.6 MILES
PATH WIDTH /MAXIMUM/:   10 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             NOV 28 2016
START TIME:             345 PM CST
START LOCATION:         1 MILE SE PARKERSBURG

END DATE:               NOV 28 2016
END TIME:               347 PM CST


TORNADO NEAR MONTEZUMA

RATING:                 EF-0
ESTIMATED PEAK WIND:    70-75 MPH
PATH LENGTH /STATUTE/:  1.5 MILES
PATH WIDTH /MAXIMUM/:   10 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             NOV 28 2016
START TIME:             414 PM CST
START LOCATION:         4 MILES NW OF NEW SHARON

END DATE:               NOV 28 2016
END TIME:               421 PM CST
END LOCATION:           5.5 MILES SW OF MONTEZUMA


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 November 29, 2016