July Rain…So Far

July 19, 2016

Here is a look at the rain totals for July through the 19th.
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Excessive Heat Watch and 100° Heat

July 19, 2016

The National Weather Service has issued an excessive heat watch for most of the area. Heat indices (the combination of the air temperature and the dew point) are expected to exceed 100°, and could be as high as 110°. The watch begins for some western counties on Wednesday and the rest of the area on Thursday. The entire watch will end on Saturday.

Excessive Heat Watch MW

 

Actual air temperatures will top out in the mid 90s, which isn’t too far off from what we’ve seen in the past couple of years. However, the National Weather Service hasn’t issued an excessive heat watch since July 2011.

warmesthighs1216

Though it will feel like 100+° during the afternoon on Thursday, Friday and Saturday, air temperatures have not been that warm since 2013. The chart below shows the last time the temperature was 100° or warmer:

City Date Temperature
Waterloo 7/25/12 104°
Dubuque 8/30/13 100°
Cedar Rapids 7/25/12 101°
Iowa City 9/8/13 105°

Cooler air (with highs in the 80s) is expected to track in on Sunday.

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Dangerous Heat Thursday and Friday

July 18, 2016

An excessive heat watch goes into effect on Thursday and extends into Saturday. The heat index could be as high as 110°.
Excessive Heat Watch
Heat can kill. If you look at the 30 year averages when it comes to weather related fatalities…heat is #1 by a lot.
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Thursday and Friday will the hottest two days in this heat wave. There will be some relief from the heat by Sunday.

PM Data Driven Line Graph-Highs

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4 Tornadoes in Iowa Sunday Morning

July 18, 2016

 

Confirmed Tornadoes on Map
NWS Damage Survey Information for July 17, 2016 Tornadoes

Tornado #1 Andrew, IA

Rating:                 EF-1
Estimated peak wind:    100 mph
Path length /Statute/:  1.0 mile
Path width /Maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start date:             July 17, 2016 
Start time:             603 AM CDT
Start location:         0.6 SW of Andrew / Jackson / IA
Start Lat/Lon:          42.1471 / -90.6023

End date:               July 17, 2016
End time:               605 AM CDT
End location:           0.4 E of Andrew / Jackson / IA
End_lat/lon:            42.1541 / -90.5853

Tornado crossed the southern parts of the town of Andrew.  
A building at the ag coop was destroyed and numerous trees 
were snapped.

Tornado #2 Park View, IA

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  1.0 mile
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             July 17, 2016 
Start time:             625 AM CDT
Start location:         1.7 SSW Parkview / Scott / IA
Start Lat/Lon:          41.6739 / -90.5489

End date:               July 17, 2016
End time:               626 AM CDT
End location:           2.0 SSE Parkview / Scott / IA
End_lat/lon:            41.6700 / -90.5295

Limbs were snapped from a tree and corn crops were damaged.

Tornado #3 Vinton, IA

Rating:                 EF-2
Estimated peak wind:    135 mph
Path length /Statute/:  1.62 mile
Path width /Maximum/:   100 yards
Fatalities:             0
Injuries:               5

Start date:             July 17, 2016 
Start time:             501 AM CDT
Start location:         South side of Vinton / Benton / IA
Start Lat/Lon:          42.1531 / -92.0327

End date:               July 17, 2016
End time:               503 AM CDT
End location:           Southeast side Vinton / Benton / IA
End_lat/lon:            42.1587 / -92.0025

Tornado tracked across the southern parts of Vinton, damaging
buildings, trees, power poles, and other structures. The tornado
first damaged trees, then hit the ball field where it destroyed
fencing, the score board and a large light pole. It then tracked
across several multi-family housing buildings, where it mainly
removed the roof structures. From there the tornado intensifed
as it struck a brick apartment building, when was unroofed and
had parts of the walls blown out. The tornado then felled a cell
phone tower and apparently began to weaken as it continued across
a large field. The roofs of another eight homes were damaged as
the tornado finally exited Vinton and continued into farmland
where it dissipated.



TORNADO # 4 Walford, IA

Rating:                EF-2
Estimated peak wind:   115 MPH 
Path length /Statute/: 4 miles 
Path width /Maximum/:  75 yards
Fatalities:            0 
Injuries:              4

Start date:            July 17, 2016
Start time:            515 AM CDT 
Start location:        1.5 miles SE Norway 
Start Lat/Lon: 40.8912/-91.8966

End date:              July 17, 2016
End time:              5:21 AM CDT
End location:          0.7 miles SE Walford
End_lat/lon:           41.8767/-91.8215

A tornado touched down southeast of Norway and tracked southeast
to Walford. It damaged two farmsteads before reaching Walford.
In Walford, it damaged the roofs of several homes. One home was 
completely destroyed when it collapsed on itself, apparently aided 
by wind-blown debris. 

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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Sunday Severe Weather

July 17, 2016

Eastern Iowa saw a very active period of weather during the overnight hours Saturday into Sunday morning.  At least 21 reports of damage were reported to the National Weather Service.

storm report

Just outside our viewing area in Hardin County, an 88 mph wind gust was reported in Steamboat Rock just after 4 O’Clock in the morning.

88

Here are a few satellite and radar images as the storms tracked through eastern Iowa.

storm 1 storm 2 storm 3

The bowing segment is indicative of some very strong winds, and that was realized in many areas as the storm tracked through.

As of Sunday night, two tornadoes were confirmed in extreme eastern Iowa; Jackson County and Scott County early Sunday morning. (Click the link for details on the two tornadoes).

Confirmed Tornadoes on Map

Two areas in the KWWL viewing area that were especially hard hit are Vinton and Walford.  The National Weather Service in the Quad Cities will be sending out a team to survey those areas in Benton and Linn counties to determine whether the damage was caused by straight-line winds or a tornado.  Expect that report out sometime on Monday.

Several photos came in from KWWL viewers.  Here is a slideshow of some of those photos.

Storm damage in Vinton

   Storm damage in Vinton

grundy center evansdale

Storm damage between Raymond & Gilbertville

Storm damage between Raymond & Gilbertville

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This post was written by Kyle Kiel
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Heat Wave Ahead

July 15, 2016

It is July after all and the weather typically is hot. Well today was not that way. Even with no rain high temperatures were only in the 70s. Usually to have highs held down in the 70s in July it would have rained for some of the afternoon.

DMA High Today3D

This time next week the weather will be much different. The hottest air of the season is on the way next week. High temperatures will be near or into the 90s starting Wednesday and remain there into the weekend of July 23-24.

Here is a look at potentially the highest heat index on Thursday. It could be as high as 105° in eastern Iowa. Heat Advisory or Heat Warning is possible later next week.
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Normal high temperatures this time of year are in the mid 80s. Above normal temperatures are likely from Wednesday through almost the end of July. That means there might be a lot of days near 90° or above in our future.

5

This is the time of year when high temperatures reach 90°. Here is a look at the last ten years at Waterloo showing how many days during each month the high temperature was 90° or warmer. Not too many in the last couple of years. In 2012, there were a lot of days with temperatures of 90° or warmer.
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24 Hour Rain Totals

July 14, 2016

Here are the latest rainfall totals across eastern Iowa.

KWWL 2015 MAX Storm ED

City Total
Waterloo 0.00
Dubuque 0.02
Cedar Rapids 0.01
Iowa City 0.43
 
Clarksville 0.2 NW 0.35
Center Junction 2.6 W 0.12
Gilbertville 1.0 NW 0.01
Swisher 0.4 NNE 0.05
Cedar Falls 1.4 SSE Trace
Waucoma 3.2 S 0.04
Cedar Rapids 3.4 NW Trace
Marengo 2.6 SSW 0.07
Coralville 1.8 NW 0.31
Kalona 7.3 NNW 0.96
Eldora 1.2 ENE 0.03
Ainsworth 7.4 N 1.06
Marion 1.2 NE 0.01
Waterloo 1.8 SSE Trace
Bellevue 0.3 SSW 0.07
Hopkinton 5.4 WSW 0.03
Marion 1.7 NNW 0.01
Central City 6.7 W 0.01
Quasqueton 1.8 S Trace
Ely 0.5 SE 0.05
Parnell 0.1 SSW 1.85
Grundy Center Trace
Maquoketa 4 W 0.07
Williamsburg 3 SE 0.68
Iowa Falls 0.01
Cascade 0.05
Tripoli Trace
Lowden 0.07
Monticello 0.06
Stanley 4 W Trace
Washington 0.28
Charles City 0.04
Manchester No. 3 Trace
Osage Trace
Conrad 0.05
Cresco 1 NE Trace
North English 1.39
Marengo 0.02
Belle Plaine Trace
Sigrouney 0.69
Strawberry Point Trace
Iowa City 0.37
Kesley 3 NNE 0.06
St. Ansgar Trace
Coggon 0.02
Bellevue 0.50
Anamosa 3 SSW 0.08
Volga 1 NE 0.01
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Latest Drought Conditions

July 14, 2016

The latest U.S. Drought Monitor was released Thursday morning, and parts of Iowa are experiencing an Abnormally Dry to Moderate Drought.  Most of the KWWL viewing area, especially across the north, have had plenty of rainfall in recent weeks.

Drought Monitor

This taken into account the precipitation that feel between July 5th and July 12th.  Fortunately, some of those areas in southern Iowa have received at least a little bit of rain from the storms that tracked through Wednesday afternoon.

KWWL 2015 MAX Storm ED

Next week, a ridge builds across the center of the country, and that brings in hot weather.  Several days are expected in the 90s, and aside from a chance for rain Saturday night and Sunday, we are looking at a mainly dry weather patter.

814temp.new     814prcp.new

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This post was written by Kyle Kiel
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Wednesday Afternoon Storm Reports

July 13, 2016

A few strong/severe storms moved across our southern Iowa, (south of I-80) Thursday afternoon. Heavy rain and strong winds caused some tree damage. Here are some of the reports…so far. I will update this link as the reports come in.
KWWL 2015 MAX Storm ED

South English: power was knocked out
Sigourney: 3 trees down
Washington: 62 mph wind gust with trees down
Iowa City: 50 mph wind gust

 

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Shelf Cloud

July 12, 2016

Sunday morning a line of storms was moving southeast. It produced a photogenic shelf cloud across much of eastern Iowa. Here are just some of the photos submitted.

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