Hail in Calmar

May 22, 2017

A few storms produced small hail with heavy rain Monday evening. Here is a photo and video of hail in Calmar.

 

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Wet Start to the Work Week

May 22, 2017

A cold front approaching from the west will bring clouds and a chance for showers and storms today. The severe weather risk is low for eastern Iowa but hail and strong winds are possible.

It will also be warmer ahead of the front, with winds from the southwest pulling in mild air. We warm to near normal for today in the upper 60s to low 70s across the board. Lows tonight: upper 40s to low 50s.

Another chance of showers/storms continues through the day Tuesday. It does look like Tuesday is a mainly rain event with isolated storms.

Temperatures drop again behind the front for Tuesday, only reaching near 60°. Rain finally tracks out early Wednesday morning. By mid-week, up to an inch of rain is possible, though most areas will probably see about a half of an inch.

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This post was written by Rachael Peart
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24 Hour Rain Totals from Saturday

May 21, 2017

Here are your 24 hour rain totals as of Sunday morning, May 21, 2017 for eastern Iowa:

Waterloo 0.40
Dubuque 0.34
Cedar Rapids 0.24
Iowa City 0.31
Ainsworth 7.4 N 0.27
Amana 4.7 W 0.26
Anamosa 3SSW, IA 0.29
Asbury 1.0 WNW 0.36
BELLE PLAINE, IA 0.12
Bellevue LD 12, IA 0.40
CASCADE, IA 0.24
Cedar Falls 1.4 SSE 0.11
Cedar Rapids 2.7 NE 0.58
Cedar Rapids 3.4 NW 0.27
Center Point 0.6 NNW 0.29
Central City 6.7 W 0.42
CHARLES CITY, IA 0.38
Decorah 4.9SE 0.61
Decorah 7.9 ENE 0.53
Dubuque #3, IA 0.38
Dubuque 1.4 WSW 0.39
Dubuque L&D 11, IA 0.37
Dysart 3.1 N 0.14
ELKADER 6SSW, IA 0.46
Ely 0.5 SE 0.62
Fairfax 4.0 NW 0.23
FAYETTE, IA 0.44
Fort Atkinson 0.2 SE 0.45
FULTON, IA 0.18
Gilbertville 1.0 NW 0.22
GRUNDY CENTER, IA 0.15
GUTTENBERG L & D 10, IA 0.75
HAMPTON, IA 0.33
IONIA 2W, IA 0.33
Iowa City 1.4 W 0.18
IOWA CITY, IA 0.28
IOWA FALLS, IA 0.23
Kalona 7.3 NNW 0.12
Latimer 1.9 NE 0.16
LOGAN, IA 0.40
LOWDEN, IA 0.26
MAQUOKETA 4 W, IA 0.33
Marion 1.2 NE 0.32
Marion 1.7 NNW 0.37
Marion 2.3 ENE 0.17
Monona WWTP, IA 0.64
Mount Auburn 2.2 NNW 0.41
NASHUA 2SW, IA 0.26
New Hampton 0.3 NNW 0.60
New Hampton 0.4 SW 0.54
Nora Springs 2.4 SSE 0.39
Oelwein 0.8 WNW Trace
Parnell 0.1 SSW 0.25
Peosta 2.9 E 0.40
Sigourney 1.1 W 0.12
Sigourney, IA 0.30
ST ANSGAR, IA 0.56
STANLEY 4 W, IA 0.39
STRAWBERRY POINT, IA 0.57
TOLEDO 3 N, IA 0.11
TRIPOLI, IA 0.55
VOLGA 1NE, IA 0.52
WASHINGTON, IA 0.11
Waterloo 1.0 SW 0.27
Waterloo 1.4 ESE 0.29
Waterloo 1.8 SSE 0.12
Wellman 4.0 E 0.27
WILLIAMSBURG 3 SE, IA 0.25
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24 Hour Rain Totals

May 20, 2017

Here are the 24 hour rain totals across eastern Iowa as of Saturday morning May 20, 2017:

Waterloo 0.35
Dubuque 0.22
Cedar Rapids 0.34
Iowa City 0.23
Ainsworth 7.4 N 0.30
Amana 4.7 W 0.50
Anamosa 3SSW, IA 0.40
Asbury 1.0 WNW 0.33
Bellevue LD 12, IA 0.37
CASCADE, IA 0.28
Cedar Falls 0.4 WNW 0.49
Cedar Rapids 2.2 WSW 0.25
Cedar Rapids 2.7 NE 0.32
Cedar Rapids 3.4 NW 0.29
Center Point 0.6 NNW 0.22
Central City 6.7 W 0.22
CHARLES CITY, IA 0.70
CLUTIER, IA 0.35
COGGON, IA 0.37
CRESCO 1NE, IA 0.44
Decorah 4.9SE 0.29
Decorah 7.9 ENE 0.17
Dubuque #3, IA 0.28
Dubuque 1.4 WSW 0.22
Dubuque L&D 11, IA 0.25
Dysart 3.1 N 0.38
EDGEWOOD, IA 0.10
Eldora 1.2 ENE 0.43
ELKADER 6SSW, IA 0.22
Ely 0.5 SE 0.30
Fairfax 4.0 NW 0.34
FAYETTE, IA 0.33
Fort Atkinson 0.2 SE 0.44
GRUNDY CENTER, IA 0.55
HAMPTON, IA 0.66
IONIA 2W, IA 0.93
Iowa City 1.4 W 0.31
Iowa City 4.5 N 0.23
IOWA FALLS, IA 0.44
Kalona 7.3 NNW 0.44
Latimer 1.9 NE 0.10
LOWDEN, IA 0.28
MAQUOKETA 4 W, IA 0.32
Marion 1.2 NE 0.33
Marion 1.7 NNW 0.29
Marion 2.3 ENE 0.30
Monona WWTP, IA 0.33
Monticello, IA 0.28
Mount Auburn 2.2 NNW 0.27
NASHUA 2SW, IA 0.08
New Hampton 0.3 NNW 0.96
New Hampton 0.4 SW 1.00
Nora Springs 2.4 SSE 0.62
NORTH ENGLISH, IA 0.19
Oelwein 0.8 WNW 0.62
Parnell 0.1 SSW 0.43
Peosta 2.9 E 0.24
Quasqueton 1.8 S 0.45
Sigourney 1.1 W 0.24
Sigourney, IA 0.15
Solon 0.3 ESE 0.30
STANLEY 4 W, IA 0.34
STRAWBERRY POINT, IA 0.27
TOLEDO 3 N, IA 0.44
TRAER, IA 0.30
TRIPOLI, IA 0.37
Urbana 1.6 W 0.57
VOLGA 1NE, IA 0.41
WASHINGTON, IA 0.47
Wellman 4.0 E 0.50
WILLIAMSBURG 3 SE, IA 0.34

Rain continues Saturday before ending late Saturday night.

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Wet Start to the Weekend

May 20, 2017

If you are looking for sunshine and warmth, this probably won’t be your favorite weekend. We’ll have cloud cover and below average highs both Saturday and Sunday. Buckle up for the temperature roller coaster coming to the area over the next 7 days. Saturday starts off wet.

A system to our south will track nearly overhead today, bringing shower and isolated storm chances to eastern Iowa.

The better chance for any rain will be earlier in the day and we slowly begin to dry during the afternoon.

Keep the umbrella handy through the day to be on the safe side. It won’t be as cool today as Friday was. Highs Saturday: 54-66.

Breezy winds today continue tonight and into Sunday as well. Lows tonight: 45-50. Sunday is dry with mostly cloudy skies. Highs Sunday: 54-62. Things return to near normal (temperature-wise) Monday with highs in the low 70s. There is slight chance for storms Monday and Tuesday.

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Two EF-1 Tornadoes Wednesday

May 18, 2017

Lake Darling State Park Iowa…

RATING:                 EF-1
ESTIMATED PEAK WIND:    110 MPH
PATH LENGTH /STATUTE/:  3.27 MILES
PATH WIDTH /MAXIMUM/:   25 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             05/17/2017
START TIME:             416 PM CDT
START LOCATION:         3.85 Miles W Pleasant Plain/ Jefferson County/ Ia
START LAT/LON:          41.1453 N/ -91.9313 W

END DATE:               05/17/2017
END TIME:               420 PM CDT
END LOCATION:           1.39 Miles W lake Darling State Park/ Washington County/ Ia
END LAT/LON:            41.1924 N/ -91.9241

A rapidly moving EF-1 tornado moved almost due north damaging farm
outbuildings and trees.

Riverside…

RATING:                 EF-1
ESTIMATED PEAK WIND:    110 MPH
PATH LENGTH /STATUTE/:  5.95 MILES
PATH WIDTH /MAXIMUM/:   40 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             05/17/2017
START TIME:             636 PM CDT
START LOCATION:         7.31 Miles NE Washington/ Washington County/ Ia
START LAT/LON:          41.3838 N/-91.6021 W

END DATE:               05/17/2017
END TIME:               642 PM CDT
END LOCATION:           3.75 Miles SE Riverside/ Washington County/ Ia
END LAT/LON:            41.4455 N/-91.5219 W

An EF-1 tornado spun up and tracked rapidly to the northeast. The tornado
damaged numerous farm outbuildings, power lines, and trees along the path.

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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Rivaling Record Highs and Severe Storms Possible

May 16, 2017

After storms Monday evening, most of Tuesday will be pretty quiet. Partly to mostly cloudy conditions cover our skies. A front to our west will track very slowly to our area and that is why we keep cloud cover around. However, with us on the west side of the front, we’ll see strong southerly winds. Winds pull in more warm air and temperatures soar into the 80s and possibly low 90s (mainly along/south of I-80). Humid conditions will make it feel even warmer (hello heat index!).

Overnight, as the front tracks closer, we have the chance for showers and storms. Storms track through between 10pm and 2am Wednesday morning. Damaging straight line winds are the greatest threat, followed by hail and isolated tornadoes.

Scattered storms continue on Wednesday, some of which could be strong or severe. SPC issued a slight risk for all of eastern Iowa on Wednesday.

Check back for updates.

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EF-0 Tornado Monday evening

May 16, 2017

Widespread wind damage occurred across
northeast Iowa late on Monday May 15, 2017. West of
Calmar, Iowa damage to trees indicated the
likelihood of a very weak tornado versus straight-line
wind damage. The damage was seen along a broken path
running southeast from 265th Avenue to the southern
shore area of Lake Meyer.

THE LAKE MEYER TORNADO…

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  A broken, 1 mile path
Path width /Maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start date:             May 15 2017
Start time:             6:45 pm
Start location:         2 miles SE Spillville, Iowa

End date:               May 15 2017
End time:               6:47 pm
End location:           2 miles SSW Calmar, Iowa

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

Here is a look at the radar from Monday evening.

Another radar image from NWS in La Crosse.

More details to come.

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Risk of Severe Weather Monday

May 15, 2017

Parts of northeast Iowa are under an “enhanced” risk for severe weather today. That area of greatest concern extends south to near highway 20.  South of highway 20 to highway 30 is under a “slight” risk. All forms of severe weather are on the table today. Storms fire up along a warm front to our north through the day and into the evening, as well. Increased humidity today gives fuel to storms that move through.

With any passing storms, wind would be the biggest threat, followed by hail and isolated tornadoes. We’re not expecting much rain from storms today so flash flooding is not a concern.

Highs Monday and Tuesday warm to the 80s before we cool back into the 70s midweek.

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Sunday Photos

May 14, 2017

Here are some viewer photos of the sky Sunday evening.  As always, if you have any pictures you’d like to share, you can send them to KWWL Storm Track 7 on Facebook and Twitter, or e-mail weather@kwwl.com

 

Sarah Bhatia – Cedar Falls

 

Julie Leavens – Greene

 

Deb Schulte – Manchester

 

Laura Hammersley – Black Hawk County

 

 

 

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This post was written by Kyle Kiel
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