Kansas, 2020

Flash Flood and Damaging Winds in Kansas, July 8 to 9, 2020

July 8 to 9, 2020 · NWS TOP · 15 events in 10 counties and zones

A bowing QLCS moved through the area on the night of 7/8 into 7/9, causing widespread wind damage.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
15

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS TOP wrote it up.

A bowing QLCS moved through the area on the night of 7/8 into 7/9, causing widespread wind damage.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before the first event at Jul 8, 10:15 PM CST, 1 hour 25 minutes earlier.

Area forecast discussion, Jul 8, 10:15 PM CST, 1 hour 25 minutes before
Area Forecast Discussion
National Weather Service Topeka KS
1115 PM CDT Wed Jul 8 2020

...Update to aviation forecast discussion...

.SHORT TERM...(This evening through Thursday)
Issued at 251 PM CDT Wed Jul 8 2020

Focus is on evolution of convection across Nebraska and
progression southeast into KS overnight. Water vapor showed main
upper wave across MT with weaker subtle waves across south central
NE and northeast OK. Westerly 500mb flow is finally beginning to
re-establish itself across the region however you have to go up to
MT/WY and the Dakotas to see flow AOA 30kts at 500mb. At the
sfc...cold front was draped from eastern SD through western NE
into northeast CO.

For tonight...expect t-storms to develop in the vicinity of the
front across central NE after 00z and given weak mid lvl flow
storms should congeal into a cluster and form a cold pool rather
quickly. After 00z 850mb LLJ of 30-40kts will nose up toward the
NE/KS state line and should support any ongoing convection diving
southeast into KS. All CAM models suggest a complex sweeping
southeast through the CWA after midnight with damaging winds
being the primary hazard overnight along with 1-2 inches of rain
especially along the western flank of the complex where
some backbuilding/training may take place.

The evolution of the cold pool and resulting placement of the
outflow boundary will determine where the better chcs for any
severe risk develops later tomorrow. At this point it appears that
the better chcs will be across southern KS closer to OK while our
area may see some lingering elevated convection through midday.

.LONG TERM...(Thursday night through Wednesday)
Issued at 251 PM CDT Wed Jul 8 2020

The region will remain in northwest flow aloft however weak
ridging from the sfc to 805mb will attempt to nose into the area
tomorrow night. This would keep any organized LLJ focused
southeast of the area. Upslope flow should allow another cluster
of storms to form across northeast CO/southwest NE however
confidence in how far east this cluster can get without better
850mb flow remains in question. At this point have left in slight
chcs after 6z but this scenario is something that will need to be
watched.

The risk for storms will persist through Friday night into
Saturday as the area remains on the periphery of the cap and
overnight clusters of storms attempt to dive south southeast. It
appears that sfc ridging and a sharpening upper trough to our east
may finally put an end to the storm chcs by Saturday night and
Sunday. Thereafter it looks to turn hotter and mainly dry with
very warm mid level temps forecast by mid week which may keep
conds dry despite a frontal boundary forecast to sag south into
the area by mid week.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1109 PM CDT Wed Jul 8 2020

Severe thunderstorms have developed late this evening in NE and
are moving toward northeastern KS. I slowed down timing of storm
arrival slightly in updated TAFs, but generally expecting strong
to severe storms containing heavy rain, damaging wind gusts and
reduced visibilities to arrive at KMHK a little after 07Z and
closer to 09Z at KTOP/KFOE. Rain will linger for a few hours and
should clear terminals by late Thursday morning.

&&

.TOP WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...Omitt
LONG TERM...Omitt
AVIATION...Teefey
Hazardous weather outlook, Jul 8, 2:29 PM CST, 9 hours 11 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Topeka KS
329 PM CDT Wed Jul 8 2020

KSZ008>012-020>024-026-034>040-054>056-058-059-092030-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
329 PM CDT Wed Jul 8 2020

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...This Afternoon and tonight.

A complex of thunderstorms will move southeast across the area
late tonight. Damaging winds and heavy rains will the primary
hazard with the storms overnight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible late Thursday night and again
Friday night into midday Saturday across the area. Some of those
storms may also be severe but confidence in timing and location
remains low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late tonight. Spotters are
encouraged to report wind estimates or wind measurements
including any damage to NWS Topeka.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

The radar

The Grand Island radar (KUEX), 110 km away, was scanning. The volume nearest the first event began at 05:41 UTC.

Open the radar archive at this moment

Event by event

14 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Thunderstorm Wind, Cloud

When
July 8, 11:40 PM CST to 11:41 PM CST
Where
Cloud County, 2.14 mi SSW of Macyville
Measured
56 kt (64 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.450, -97.830

Wind estimated at 65 mph. Tree damage also reported, but the extent of damage is unknown.

Thunderstorm Wind, Cloud

When
July 8, 11:45 PM CST to 11:46 PM CST
Where
Cloud County, 0.53 mi E of Concordia
Measured
56 kt (64 mph) estimated gust
Reported by
Public
Coordinates
39.570, -97.660

Large tree limb down, as reported on Facebook. Time estimated based on radar.

Thunderstorm Wind, Washington

When
July 9, 12:12 AM CST to 12:13 AM CST
Where
Washington County, 2.81 mi S of Washington
Measured
54 kt (62 mph) measured gust
Reported by
Mesonet
Coordinates
39.780, -97.060

Mesonet station measured 62 kt gust.

Thunderstorm Wind, Marshall

When
July 9, 12:35 AM CST to 12:36 AM CST
Where
Marshall County, 0.69 mi N of Marysville Arpt
Measured
60 kt (69 mph) measured gust
Reported by
AWOS
Coordinates
39.860, -96.630

Measurement from the Marysville airport.

Thunderstorm Wind, Dickinson

When
July 9, 12:50 AM CST to 12:51 AM CST
Where
Dickinson County, 4.95 mi NNE of Buckeye
Measured
56 kt (64 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.120, -97.150

Power out with numerous tree branches reported down. Time estimated from radar.

Thunderstorm Wind, Nemaha

When
July 9, 1:06 AM CST to 1:07 AM CST
Where
Nemaha County, 4.44 mi SSW of Baileyville
Measured
56 kt (64 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.790, -96.210

Power out at location. Very strong winds reported, speed estimated.

Thunderstorm Wind, Shawnee

When
July 9, 2:04 AM CST to 2:05 AM CST
Where
Shawnee County, 5.53 mi SSW of Menoken
Measured
61 kt (70 mph) estimated gust
Reported by
NWS Employee
Coordinates
39.010, -95.800

Tree 12 inches in diameter split in half at 29th and Romar. Time estimated from radar.

Thunderstorm Wind, Shawnee

When
July 9, 2:05 AM CST to 2:06 AM CST
Where
Shawnee County, 1.75 mi SE of Menoken
Measured
56 kt (64 mph) estimated gust
Reported by
NWS Employee
Coordinates
39.060, -95.730

Large tree limbs reported down in and around Gage Park. Time estimated from radar.

Thunderstorm Wind, Shawnee

When
July 9, 2:10 AM CST to 2:11 AM CST
Where
Shawnee County, 1.07 mi W of Berryton
Measured
56 kt (64 mph) measured gust
Reported by
ASOS
Coordinates
38.930, -95.650

Measured at Forbes in Topeka.

Thunderstorm Wind, Shawnee

When
July 9, 2:15 AM CST to 2:16 AM CST
Where
Shawnee County, 0.87 mi NW of (Top)billard Arpt to
Measured
50 kt (58 mph) measured gust
Reported by
ASOS
Coordinates
39.080, -95.630

Corrects previous report from 3 NE Topeka.

Thunderstorm Wind, Shawnee

When
July 9, 2:20 AM CST to 2:21 AM CST
Where
Shawnee County, 0.54 mi W of Tecumseh
Measured
52 kt (60 mph) estimated gust
Reported by
NWS Employee
Coordinates
39.050, -95.590

Tree limbs 2 to 4 inches in diameter down. Time estimated from radar.

Thunderstorm Wind, Jefferson

When
July 9, 2:22 AM CST to 2:23 AM CST
Where
Jefferson County, 3.5 mi S of Meriden
Measured
56 kt (64 mph) estimated gust
Reported by
Law Enforcement
Coordinates
39.130, -95.580

A tree and other branches reported down on the Muddy Creek bridge on K-4. The highway was closed for a brief time.

Thunderstorm Wind, Lyon

When
July 9, 2:45 AM CST to 2:46 AM CST
Where
Lyon County, 0.54 mi W of (Emp)emporia Muni Ar
Measured
50 kt (58 mph) measured gust
Reported by
ASOS
Coordinates
38.330, -96.190

Measured at kemp.

Flash Flood, Ottawa

When
July 9, 3:00 AM CST to 4:00 AM CST
Where
Ottawa County, 8.67 mi NW of Delphos to 5.24 mi NNE of Delphos
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
39.353, -97.902

Several feet of water flooding roads at Main and 7th, and over a section of 90th road. Water also reported to be entering homes on the northwest side of town.

Thunderstorm Wind, Franklin

When
July 9, 3:15 AM CST to 3:16 AM CST
Where
Franklin County, 3.32 mi ESE of Ottawa Muni Arpt
Measured
52 kt (60 mph) estimated gust
Reported by
COOP Observer
Coordinates
38.520, -95.190

Tree branches two inches in diameter blown down. Time estimated from radar.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Kansas in 2020Every state in 2020This day in weather historyWarnings in Kansas, July 2020

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 910437, 910438, 910439, 910441, 910442, 910443, 910445, 910446, 910447, 910449, 910452, 910455, 910456, 911921, 910458.