Alert archive / Kansas / Flash Flood Warnings in 2021
Flash Flood Warning 7, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at May 27, 2021, 5:55 PM CDT for Johnson County, Leavenworth County, Wyandotte County, Kansas; Clay County, Jackson County, Platte County, Missouri. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 27, 2021, 5:55 PM CDT (22:55 UTC)
- Expired
- May 27, 2021, 9:00 PM CDT
- In force
- 3 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
The radar
The Pleasant Hill radar (KEAX), 68 km from the middle of the area, began a volume at 22:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 6:21 PM CDT | FLASH FLOOD | 5 Wnw Bonner Springs, KS | 8 TO 12 INCHES OF WATER OVER ROADWAY SOUTH OF THE 166TH ST AND METRO AVE INTERSECTION. |
| May 27, 6:55 PM CDT | FLASH FLOOD | 3 N De Soto, KS | 12 INCHES OF WATER OVER ROADWAYS, 6 CARS CURRENTLY STALLED OUT IN WATER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 10.9 hours before the alert went out and 55 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
- 3 J/kg
- Mixed-layer CIN
- -459 J/kg
- Mixed-layer LCL
- 1511 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 343 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
403
WGUS53 KEAX 272255
FFWEAX
KSC091-103-209-MOC047-095-165-280200-
/O.NEW.KEAX.FF.W.0007.210527T2255Z-210528T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
555 PM CDT Thu May 27 2021
The National Weather Service in Pleasant Hill MO has issued a
* Flash Flood Warning for...
Northwestern Johnson KS County in east central Kansas...
Southern Leavenworth County in northeastern Kansas...
Wyandotte County in northeastern Kansas...
Southwestern Clay County in west central Missouri...
Northwestern Jackson County in west central Missouri...
Southeastern Platte County in west central Missouri...
* Until 900 PM CDT.
* At 555 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 3 inches of rain have fallen. Additional rainfall amounts
of 0.5 to 1 inch are possible in the warned area. Flash flooding
is already occurring.
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, Lenexa,
Liberty, Gladstone, Merriam, Mission, Smithville, Bonner Springs,
De Soto, Parkville, Tonganoxie, Basehor, Edwardsville, North
Kansas City, Sugar Creek and Riverside.
This includes the following highways...
Kansas Turnpike between mile markers 206 and 226.
Interstate 435 between mile markers 6 and 24...and
between mile markers 38 and 57.
Interstate 35 in Kansas between mile markers 230 and 235.
Interstate 635 between mile markers 0 and 12.
Interstate 29 between mile markers 0 and 11.
Interstate 35 in Missouri between mile markers 0 and 16.
Interstate 70 in Kansas between mile markers 410 and 423.
Interstate 70 in Missouri between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3908 9519 3935 9453 3917 9440 3905 9460
3898 9487 3895 9506 3898 9506 3899 9507
3898 9508 3898 9509 3896 9508 3895 9509
3896 9510 3897 9511 3897 9513 3898 9516
3897 9517 3896 9519
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
PP1 follow-up statement
679
WGUS73 KEAX 280158
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
858 PM CDT Thu May 27 2021
KSC091-103-209-MOC047-095-165-280208-
/O.EXP.KEAX.FF.W.0007.000000T0000Z-210528T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnson KS KS-Leavenworth KS-Wyandotte KS-Clay MO-Jackson MO-
Platte MO-
858 PM CDT Thu May 27 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR
NORTHWESTERN JOHNSON KS, SOUTHERN LEAVENWORTH, WYANDOTTE,
SOUTHWESTERN CLAY, NORTHWESTERN JACKSON AND SOUTHEASTERN PLATTE
COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3908 9519 3935 9453 3917 9440 3905 9460
3898 9487 3895 9506 3898 9506 3899 9507
3898 9508 3898 9509 3896 9508 3895 9509
3896 9510 3897 9511 3897 9513 3898 9516
3897 9517 3896 9519
$$
PPThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 1:20 AM CDT | River Flood Warning | EAX | Atchison, Leavenworth | 7 hr |
| May 27, 2:50 AM CDT | Special Weather Statement | EAX | Leavenworth, Wyandotte | 40 min |
| May 27, 6:19 AM CDT | Special Weather Statement | EAX | Johnson, Miami | 41 min |
| May 27, 6:28 AM CDT | Special Weather Statement | EAX | Leavenworth, Wyandotte | 32 min |
| May 27, 7:51 AM CDT | Areal Flood Advisory | EAX | Miami | 71 min |
| May 27, 9:02 AM CDT | Flash Flood Warning | EAX | Miami | 3 hr |
| May 27, 9:49 AM CDT | River Flood Warning | EAX | Miami | 3 days |
| May 27, 9:57 AM CDT | River Flood Warning | EAX | Linn | 4 days |
| May 27, 10:50 AM CDT | Flash Flood Watch | EAX | Linn, Miami | 8 hr |
| May 27, 11:23 AM CDT | River Flood Warning | EAX | Linn | 4 days |
| May 27, 11:46 AM CDT | Areal Flood Warning | EAX | Linn, Miami | 9 hr |
| May 27, 4:08 PM CDT | Special Weather Statement | EAX | Wyandotte | 37 min |
| May 27, 4:51 PM CDT | Areal Flood Advisory | EAX | Johnson, Leavenworth, Wyandotte | 3 hr |
| May 27, 5:14 PM CDT | Severe Thunderstorm Warning | EAX | Johnson, Leavenworth, Wyandotte | 31 min |
| May 27, 5:40 PM CDT | Severe Thunderstorm Warning | EAX | Leavenworth, Wyandotte | 35 min |
| May 27, 1:20 AM CDT | River Flood Warning | EAX | Carroll | 32 hr |
| May 27, 1:20 AM CDT | River Flood Warning | EAX | Cooper, Saline | 55 hr |
| May 27, 1:20 AM CDT | River Flood Warning | EAX | Cass, Henry, Johnson | 4 days |
| May 27, 1:20 AM CDT | River Flood Warning | EAX | Johnson, Pettis | 39 hr |
| May 27, 3:15 AM CDT | Special Weather Statement | EAX | Andrew | 45 min |
| May 27, 3:51 AM CDT | Special Weather Statement | EAX | Clay, Clinton | 39 min |
| May 27, 4:05 AM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Clinton, Daviess, DeKalb | 40 min |
| May 27, 4:26 AM CDT | Special Weather Statement | EAX | Caldwell, Carroll | 49 min |
| May 27, 4:50 AM CDT | Special Weather Statement | EAX | Henry | 40 min |
| May 27, 5:27 AM CDT | Special Weather Statement | EAX | Chariton, Linn, Macon, Sullivan | 48 min |
| May 27, 5:37 AM CDT | Special Weather Statement | EAX | Pettis | 38 min |
| May 27, 6:22 AM CDT | River Flood Warning | EAX | Clay, Ray | 27 hr |
| May 27, 6:51 AM CDT | Special Weather Statement | EAX | Jackson | 39 min |
| May 27, 8:31 AM CDT | Areal Flood Advisory | EAX | Henry, Johnson, Pettis | 31 min |
| May 27, 9:02 AM CDT | Flash Flood Warning | EAX | Henry, Johnson, Pettis | 3 hr |
| May 27, 9:35 AM CDT | River Flood Warning | EAX | Bates, Cass, Henry | 56 hr |
| May 27, 11:46 AM CDT | Areal Flood Warning | EAX | Henry, Johnson, Pettis | 9 hr |
| May 27, 12:25 PM CDT | River Flood Warning | EAX | Howard | 8 hr |
| May 27, 12:25 PM CDT | River Flood Warning | EAX | Cooper | 19 hr |
| May 27, 4:50 PM CDT | Special Weather Statement | EAX | Clay | 40 min |
| May 27, 5:05 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Ray | 25 min |
| May 27, 5:58 PM CDT | Flash Flood Warning | EAX | Clay, Ray | 3 hr |
| May 27, 6:11 PM CDT | Special Weather Statement | EAX | Clay | 34 min |
Nearby
Flash Flood Warnings in Kansas, 2021Flash Flood Warnings in Missouri, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.