Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 27, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at Jun 30, 2021, 8:38 AM CDT for 4 counties in Missouri; Johnson County, Leavenworth County, Wyandotte County, Kansas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 30, 2021, 8:38 AM CDT (13:38 UTC)
- Expired
- Jun 30, 2021, 12:22 PM CDT
- In force
- 4 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Clay County, MO, Jackson County, MO, Platte County, MO, Ray County, MO
The radar
The Pleasant Hill radar (KEAX), 37 km from the middle of the area, began a volume at 13:40 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 (KTOP), launched 12:00Z, 1.6 hours before the alert went out and 110 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
- 247 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
367
WGUS53 KEAX 301338
FFWEAX
KSC091-103-209-MOC047-095-165-177-301730-
/O.NEW.KEAX.FF.W.0027.210630T1338Z-210630T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
838 AM CDT Wed Jun 30 2021
The National Weather Service in Pleasant Hill MO has issued a
* Flash Flood Warning for...
Johnson KS County in east central Kansas...
Southern Leavenworth County in northeastern Kansas...
Wyandotte County in northeastern Kansas...
Clay County in west central Missouri...
Northern Jackson County in west central Missouri...
Southeastern Platte County in west central Missouri...
Ray County in west central Missouri...
* Until 1230 PM CDT.
* At 838 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 2 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Kansas City, Overland Park, Olathe, Independence, Shawnee, Blue
Springs, Lenexa, Leawood, Raytown, Liberty, Gladstone, Prairie
Village, Gardner, Lansing, Excelsior Springs, Merriam, Mission,
Smithville, Kearney and Bonner Springs.
This includes the following highways...
Kansas Turnpike between mile markers 206 and 226.
Interstate 435 between mile markers 0 and 26...and
between mile markers 35 and 67...and
between mile markers 77 and 83.
Interstate 35 in Kansas between mile markers 214 and 235.
Interstate 635 between mile markers 0 and 12.
Interstate 29 between mile markers 0 and 13.
Interstate 35 in Missouri between mile markers 0 and 31.
Interstate 70 in Kansas between mile markers 410 and 423.
Interstate 70 in Missouri between mile markers 0 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3905 9519 3918 9501 3942 9442 3952 9387
3925 9376 3921 9376 3921 9386 3914 9396
3914 9397 3915 9399 3920 9397 3919 9403
3915 9402 3914 9410 3910 9411 3902 9443
3875 9506 3898 9506 3895 9509 3896 9519
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
PP1 follow-up statement
063
WGUS73 KEAX 301722
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
1222 PM CDT Wed Jun 30 2021
KSC091-103-209-MOC047-095-165-177-301732-
/O.CAN.KEAX.FF.W.0027.000000T0000Z-210630T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnson KS KS-Leavenworth KS-Wyandotte KS-Clay MO-Jackson MO-
Platte MO-Ray MO-
1222 PM CDT Wed Jun 30 2021
...FLASH FLOOD WARNING FOR SOUTHERN LEAVENWORTH, WYANDOTTE, CLAY,
NORTHERN JACKSON, SOUTHEASTERN PLATTE AND RAY COUNTIES HAS BEEN
REPLACED WITH A FLOOD WARNING...
LAT...LON 3905 9519 3918 9501 3942 9442 3952 9387
3925 9376 3921 9376 3921 9386 3914 9396
3914 9397 3915 9399 3920 9397 3919 9403
3915 9402 3914 9410 3910 9411 3902 9443
3875 9506 3898 9506 3895 9509 3896 9519
$$
PPThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 9:06 AM CDT | River Flood Warning | EAX | Bates | 59 hr |
| Jun 30, 10:28 AM CDT | River Flood Warning | EAX | Carroll, Lafayette, Saline | 40 hr |
| Jun 30, 11:06 AM CDT | River Flood Warning | EAX | Jackson | 3 hr |
| Jun 30, 11:06 AM CDT | River Flood Warning | EAX | Clay, Ray | 9 hr |
| Jun 30, 12:04 PM CDT | Flash Flood Warning | EAX | Cass, Jackson, Johnson, Lafayette | 4 hr |
| Jun 30, 12:22 PM CDT | Areal Flood Warning | EAX | Clay, Jackson, Platte | 18 hr |
| Jun 30, 12:50 PM CDT | River Flood Warning | EAX | Linn, Livingston | 34 hr |
| Jun 30, 2:12 PM CDT | River Flood Warning | EAX | Jackson | 6 hr |
| Jun 30, 2:33 PM CDT | Flash Flood Warning | EAX | Bates, Cass, Henry, Johnson, Pettis | 4 hr |
| Jun 30, 2:56 PM CDT | Special Weather Statement | EAX | Bates | 49 min |
| Jun 30, 3:54 PM CDT | Areal Flood Warning | EAX | Cass, Jackson, Johnson, Lafayette | 14 hr |
| Jun 30, 4:15 PM CDT | River Flood Warning | EAX | Jackson, Lafayette, Ray | 49 hr |
| Jun 30, 4:50 PM CDT | Flash Flood Warning | EAX | Andrew, Daviess, DeKalb, Gentry, Grundy, Harrison and 5 more | 4 hr |
| Jun 30, 9:06 AM CDT | River Flood Warning | EAX | Miami | 3 days |
| Jun 30, 9:06 AM CDT | River Flood Warning | EAX | Linn | 4 days |
Nearby
Flash Flood Warnings in Missouri, 2021Flash Flood Warnings in Kansas, 2021Every flash flood warning in 2021
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.