Tornado Wednesday Evening Near Carroll

April 20, 2017

Here are some radar products showing when the tornado was southwest of Carroll.

 

The map below shows some more details about the tornado reports.

 

The National Weather Service in Des Moines did the storm survey and rated the tornado an EF-0.

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EF-0 Tornado Near Carroll Wednesday Evening

April 20, 2017
PRELIMINARY NWS DAMAGE SURVEY FOR APRIL 19TH TORNADO EVENT...

.CARROLL IOWA TORNADO...

RATING: EF-0
  ESTIMATED PEAK WIND: 70 MPH
 PATH LENGTH /STATUTE/: 0.25 MILES
 PATH WIDTH /MAXIMUM/: 50 YARDS
 FATALITIES: 0
 INJURIES: 0

START DATE: APRIL 19 2017
 START TIME: 8:04 PM CDT
 START LOCATION: 2 MILES SOUTHEAST OF CARROLL
 START LAT/LON: 42.0492

END DATE: APRIL 19 2017
 END TIME: 8:05 PM CDT
 END LOCATION: 2 MILES SOUTHEAST OF CARROLL
 END_LAT/LON: 42.0513

NWS STORM SURVEY CONFIRMED A BRIEF TORNADO TOUCHDOWN OCCURRED ABOUT 2 MILES
 SOUTHEAST OF CARROLL...WITH THE TORNADO ON THE GROUND A VERY SHORT DISTANCE.
 PRIMARY DAMAGE WAS TO A MACHINE SHED WHERE A SIGNIFICANT PORTION OF THE SHEET
 METAL ROOF WAS REMOVED. THIS IS CONSISTENT WITH WINDS AROUND 70 MPH...OR
 EF-0 DAMAGE.

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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Rainfall- 24-Hour Totals Through 7 AM Thursday

April 20, 2017

TOWN 24 HR RAIN TOTAL Wed AM-Thu AM
   
Waterloo (Airport) 0.53
Dubuque (Airport) 0.01
Cedar Rapids (Airport) 0.01
Iowa City (Airport) Trace
 
Ainsworth 7.4 mi N 0.30
Amana 4.7 mi W 0.03
Cedar Falls 0.6 N 0.57
Cedar Falls 1.4 mi SSE 0.54
Cedar Rapids 2.0 mi ENE Trace
Central City 6.7 mi W 0.01
Clarksville 0.2 mi NW 0.54
Clayton Center 0.78
Decorah 4.9 SE 1.22
Decorah 7.9 mi ENE 1.27
Dubuque 1.4 WSW 0.34
Dysart 0.04
Edgewood 0.91
Elgin 1.36
Ely 0.02
Fayette 1.50
Fort Atkinson 1.20
Gilbertville 1.0 NW 0.53
Harpers Ferry 1.10
Hopkinton 5.4 WSW 0.12
Independence 0.89
Ionia 1.43
Kalona 7.3 mi NNW 0.03
Latimer 1.9 mi NE 0.54
Marion 1.2 mi NE Trace
Mt Auburn 0.08
New Hampton 0.3 mi NNW 1.34
New Hampton 0.4 mi SW 1.20
Nora Springs 1.10
Oelwein 0.8 mi WNW 1.01
Osage 1.10
Parnell 0.1 WNW 0.03
Quasqueton 0.4 WSW 0.29
Solon 0.3 mi ESE Trace
St. Ansgar 1.16
Waterloo 1.0 mi SW 0.80
Waterloo 3 mi NNW 0.48
Waukon 1.20
Wellman 0.16
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Severe Weather Potential Update at 2:30 PM

April 19, 2017

Rain continues to move northeast across northeast Iowa early this afternoon. There is a risk for storms later today with the best chance between 6-11 pm. If any of those storms develop a few of them could become severe. The primary threat is large hail and damaging winds. There is a low threat of tornadoes and flash flooding.

 

Once the storms track out of the area the wind increases from south and southwest overnight with gusts to 30 mph. It remains windy all day Thursday with the wind diminishing Thursday night. Thursday morning starts out with a mostly cloudy and by the afternoon it is mostly sunny. High temperatures are in the low 50s north and low 60s south

The next few days are quiet with a mostly sunny to partly cloudy sky each day. Highs are in the upper 50s and low 60s through Saturday and then jump into the mid 60s Sunday into early next week.

The next chance of rain is Tuesday with a few storms possible Wednesday.

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Severe Weather Outlook Update at Noon

April 19, 2017

A few showers and isolated storms through early this afternoon. Another around of storms this evening into the overnight. The time is after 5 pm to about midnight. This line of storms has the potential for severe weather.

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Enhanced Risk for Eastern Iowa Wednesday

April 19, 2017

The entire KWWL viewing area is at risk for severe weather this afternoon and evening. Far northern counties are under a “slight” risk but most of the area is under an “enhanced” risk. Those under the enhanced risk have a greater chance of seeing the severe weather later today.

We’ll have all the ingredients in place for severe weather today. The biggest concern with severe weather today is large hail, followed by damaging winds and then tornadoes.

Storms will be out of eastern Iowa by midnight. A few lingering showers continue early Thursday morning.

Behind tonight’s system, clouds clear through the day tomorrow. Winds strengthen tomorrow, as well. Temperatures fail to reach our normal highs Thursday through Saturday and only warm to the upper 50s/low 60s. Our weather stays quiet and pretty mild through Monday. Windy conditions return Monday ahead of our next system Tuesday.

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Severe Weather Potential Wednesday

April 18, 2017

The sky is mostly cloudy tonight with a few showers possible. Lows tonight hover around 50 degrees. Showers and storms will come in two waves. The first round of showers/storms will come around mid morning. Non-severe storms are expected with those. The second round of showers/storms will be during the evening. This is where we have the best chance of any severe weather. Severe threat with any of the storms would be large hail, damaging winds, heavy rain and isolated tornado. The storms end before midnight followed by the wind increasing. The wind remains strong as it turns to the northwest Thursday. Clouds clear throughout the day as cooler air moves into the area. Friday through Tuesday is dry with varying cloud cover. High temperatures will be near or below normal for this time of year with highs in mid 50s to low 60s.

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Photos on Evening Newscasts

April 17, 2017

Taken April 1, 2017

Taken April 17, 2017

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EF-1 Tornado in Jones County Saturday evening

April 17, 2017

 



NWS DAMAGE SURVEY FOR 04/15/17 TORNADO EVENT…

OVERVIEW…Several severe thunderstorms developed across eastern Iowa
during the evening of April 15th. While hail and heavy rainfall were primarily
produced, one storm produced a weak tornado across western Jones County.

Additional information may be added to the bottom of this statement as it
becomes available.

TORNADO…NE Anamosa/SE Langworthy Iowa…

RATING: EF-1
ESTIMATED PEAK WIND: 100 MPH
PATH LENGTH /STATUTE/: 3.22 MILES
PATH WIDTH /MAXIMUM/: 25 YARDS
FATALITIES: 0
INJURIES: 0

START DATE: 04/15/17
START TIME: 850 PM CDT
START LOCATION: 4 NE Anamosa / Jones / Iowa
START LAT/LON: 42.1417 / -91.2288

END DATE: 04/15/17
END TIME: 855 PM CDT
END LOCATION: 4 SE Langworthy / Jones / Iowa
END LAT/LON: 42.1469 / -91.1678

EF-1 TORNADO BEGAN AROUND 850 PM CDT SATURDAY EVENING…4
MILES NORTHEAST OF ANAMOSA. THE TORNADO TRACKED AROUND 3
MILES TO THE EAST BEFORE LIFTING…WITH DAMAGE TO TREES
AND OUTBUILDINGS 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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Rainfall Totals- Saturday morning through Sunday morning

April 16, 2017

Quite a range in rainfall totals for April 15th.

Town Amount
Waterloo 0.18
Dubuque 2.25
Cedar Rapids 0.59
Iowa City 0.98
   
Ainsworth 7.4 N 0.28
Amana 4.7 W 0.61
Anamosa 2.65
Belle Plaine 1.9
Bellevue 0.3 SSW 1.24
Bellevue L&D 12 1.12
Cascade 1.59
Cedar Falls 0.4 WNW 0.22
Cedar Falls 0.6 N 0.27
Cedar Falls 1.4 SSE 0.3
Cedar Rapids 2.2 WSW 1.7
Cedar Rapids 3.4 NW 2.44
Center Point 0.6 NNW 2.44
Central City 6.7 W 2.4
Charles City 0.18
Clutier 1.58
Coggon 1.36
Cresco 1 NE 0.69
Decorah 0.33
Decorah 4.9SE 0.25
Decorah 7.9 ENE 0.33
Dubuque #4 2.17
Dubuque 1.4 WSW 0.86
Dubuque L&D 11 0.86
Dysart 3.1 N 1.28
Edgewood 0.29
Elkader 6 SSW 0.32
Elma 0.43
Ely 0.5 SE 0.64
Fairfax 0.0 NW 2.9
Fairfax 4.0 NW 1.86
Fayette 0.11
Fort Atkinson 0.2 SE 0.06
Fulton 1.79
Gilbertville 1.0 NW 0.82
Grundy Center 0.9
Guttenberg L&D 10 0.11
Hampton 0.36
Hopkinton 5.4 WSW 0.86
Ionia 0.08
Iowa City 1.04
Iowa City 1.4 W 0.88
Iowa City 4.5 N 0.75
Iowa Falls 0.55
Kalona 7.3 NNW 0.82
Kesley 3 NNE 0.38
Latimer 1.9 NE 0.24
Lowden 2.17
Manchester No. 2 0.42
Maquoketa 4 W 1.46
Marion 1.2 NE 2.77
Marion 1.7 NNW 2.11
Marquette 0.2 NNE 0.11
Mason City 3.1 ENE 0.19
Monona WWTP 0.11
Monticello 1.29
Mount Auburn 2.2 NNW 1.01
Nashua 3 SW 0.14
New Hampton 0.3 NNW 0.06
New Hampton 0.4 SW 0.07
Nora Springs 2.4 SSE 0.96
North English 0.6
Oelwein 0.8 WNW 0.29
Palo 4.4 SSW 2.71
Parkersburg 0.15
Parnell 0.1 SSW 0.58
Peosta 2.9 E 1.2
Robins 0.4 SSE 2.77
Sigourney 0.11
Sigourney 1.1 W 0.17
Solon 0.3 ESE 1.06
St. Ansgar 0.12
Stanley 4 W 0.12
Swisher 0.4 NNE 0.59
Toledo 3 N 1.01
Traer 1.35
Tripoli 0.1
Urbana 1.6 W 1.58
Vinton 2.05
Volga 1 NE 0.26
Washington 0.21
Waterloo 1.0 SW 0.46
Waterloo 1.4 ESE 0.68
Waterloo 1.8 SSE 0.49
Waucoma 0.1
Waucoma 3.2 S 0.04
Wellman 4.0 E 0.34
Williamsburg 3 SE 0.45
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