Kansas, 2020Flash 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.
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
- 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.
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
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
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.
- 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.
- Tornadoes and Damaging Wind in Minnesota, July 8, 20201 death · 2 injured · $1.9 million · EF4 · 5 events
- Heat in Arizona, July 8, 20202 deaths · 2 events
- Tornadoes and Damaging Winds in Minnesota, July 8, 2020$2.4 million · EF2 · 23 events
- Lightning Strike in Indiana, July 8, 20201 death · 1 event
- Tornado and Hail in Nebraska, July 8 to 9, 2020$295,000 · EF0 · 61 events
- Hail and Damaging Winds in Vermont, July 8, 2020$275,000 · 1.5 in hail · 20 events
- Damaging Winds in New York, July 8, 2020$61,000 · 50 kt wind · 7 events
- Flash Flooding and Damaging Winds in Pennsylvania, July 8, 2020$40,000 · 61 kt wind · 15 events
- Damaging Winds in Nebraska, July 8 to 9, 202070 kt wind · 37 events
- Damaging Wind in Minnesota, July 8, 2020$50,000 · 56 kt wind · 1 event
- Tornado and Flood in Minnesota, July 8 to 9, 2020$10,000 · EF0 · 33 events
- Hail and Damaging Winds in South Dakota, July 8, 2020$36,000 · 59 kt wind · 5 events
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.