Alert archive / Missouri / Flash Flood Watches in 2017
Flash Flood Watch 6, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood watch at Aug 20, 2017, 2:36 PM CDT for 23 counties in Missouri; 7 counties in Kansas. It took effect at Aug 21, 2017, 10:00 PM CDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2017, 2:36 PM CDT (19:36 UTC)
- In effect from
- Aug 21, 2017, 10:00 PM CDT
- Expired
- Aug 22, 2017, 10:00 AM CDT
- In force
- 12 hr
- Issued by
- NWS Kansas City, MO
- Flood severity
- None
All 30 counties
Atchison County, KS, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Wyandotte County, KS, Andrew County, MO, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Grundy County, MO, Henry County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Pettis County, MO, Platte County, MO, Ray County, MO, Saline County, MO, Sullivan County, MO
The radar
The Pleasant Hill radar (KEAX), 55 km from the middle of the area, began a volume at 19:37 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Topeka, KS (KFOE), launched 12:00Z, 7.6 hours before the alert went out and 131 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 415 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 1090 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- -54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.2
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Kansas City, MO wrote its last area forecast discussion before this flash flood watch went out at Aug 20, 1:03 PM CDT, 1 hour 33 minutes earlier.
Area forecast discussion, Aug 20, 1:03 PM CDT, 1 hour 33 minutes before
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</html>Hazardous weather outlook, Aug 20, 5:39 AM CDT, 8 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Kansas City/Pleasant Hill MO 539 AM CDT Sun Aug 20 2017 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-211045- Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS- Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler- Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton- Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton- Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis- Cooper-Bates-Henry- 539 AM CDT Sun Aug 20 2017 This hazardous weather outlook is for northwest...north central and west central Missouri...as well as extreme eastern Kansas. .DAY ONE...Today and Tonight Storms this morning will produce 40-50 mph winds across the Kansas City metro and points southeastward. Heat indices are expected to reach the 100 to 105 degree mark this afternoon area-wide. More detailed information can be accessed at... https://www.weather.gov/eax/hwo .DAYS TWO THROUGH SEVEN...Monday through Saturday Additional storms are possible early Monday morning, and are likely Monday night through Tuesday morning. A few storms could become strong to severe, particularly Monday night. In addition, heavy rain could lead to localized flooding. More detailed information can be accessed at... https://www.weather.gov/eax/hwo
In the hours before
Special weather statement, Aug 20, 10:13 AM CDT, 4 hours 23 minutes before
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</html>Local storm report, Aug 20, 10:17 AM CDT, 4 hours 19 minutes before
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</html>Local storm report, Aug 20, 11:20 AM CDT, 3 hours 16 minutes before
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</html>The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:55 AM CDT | Special Weather Statement | EAX | Andrew, Holt, Nodaway, Worth | 50 min |
| Aug 20, 3:39 AM CDT | Special Weather Statement | EAX | Andrew, Buchanan, DeKalb, Gentry, Worth | 51 min |
| Aug 20, 8:23 AM CDT | Special Weather Statement | EAX | Clinton | 52 min |
| Aug 20, 5:52 PM CDT | Special Weather Statement | EAX | Henry | 23 min |
Nearby
Flash Flood Watches in Missouri, 2017Flash Flood Watches in Kansas, 2017Every flash flood watch in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.