Alert archive / Kansas / Flash Flood Warnings in 2012
Flash Flood Warning 6, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at May 6, 2012, 8:18 PM CDT for Johnson County, Kansas; Jackson County, Missouri. It was in force for 6 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
- May 6, 2012, 8:18 PM CDT (01:18 UTC)
- Expired
- May 7, 2012, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Johnson County, KS, Jackson County, MO
The radar
The Pleasant Hill radar (KEAX), 31 km from the middle of the area, began a volume at 01:21 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 00:00Z, 1.3 hours before the alert went out and 91 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
- 2839 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.0
The text
As transmitted, in the capitals the NWS used until 2016.
620 WGUS53 KEAX 070118 FFWEAX KSC091-MOC095-070700- /O.NEW.KEAX.FF.W.0006.120507T0118Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 818 PM CDT SUN MAY 6 2012 THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS... SOUTHWESTERN JACKSON COUNTY IN WEST CENTRAL MISSOURI... * UNTIL 200 AM CDT * AT 808 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RAINFALL AMOUNTS SO FAR IN THIS REGION HAVE RANGED FROM 2 TO 4 INCHES...WITH AN ADDITIONAL 1 TO 2 INCHES POSSIBLE THIS EVENING. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... LEAWOOD...OVERLAND PARK...AND GRANDVIEW. THIS WILL IMPACT I-435 LOOP FROM MILE MARKERS 69 TO 76. TOMAHAWK CREEK IN JOHNSON COUNTY KANSAS. INDIAN CREEK DOWNSTREAM OF THE CONFLUENCE WITH TOMAHAWK CREEK. SMALL CREEKS ACROSS SOUTHWEST JACKSON COUNTY MISSOURI. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3898 9454 3891 9445 3881 9471 3888 9475 $$ SAW
2 follow-up statements
749 WGUS73 KEAX 070236 FFSEAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 936 PM CDT SUN MAY 6 2012 KSC091-MOC095-070700- /O.CON.KEAX.FF.W.0006.000000T0000Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JOHNSON KS-JACKSON MO- 936 PM CDT SUN MAY 6 2012 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EAST CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS...AND SOUTHWESTERN JACKSON COUNTY IN WEST CENTRAL MISSOURI UNTIL 200 AM CDT... AT 927 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS HAD PUSHED SOUTH OF THE WARNED AREA. RAINFALL AMOUNTS FROM EARLIER RAINFALL GENERALLY RANGED FROM 2...TO 4 INCHES. ADDITIONAL SCATTERED THUNDERSTORMS ARE LIKELY DURING THE OVERNIGHT HOURS. RAINFALL AMOUNTS WITH THESE STORMS ARE EXPECTED TO BE AROUND A QUARTER OF AN INCH. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...OVERLAND PARK...LEAWOOD...AND GRANDVIEW. STREAM BASINS WHICH WILL EXPERIENCE FLOODING INCLUDE TOMAHAWK AND INDIAN CREEKS. IN ADDITION...SMALL CREEKS ACROSS SOUTHWEST JACKSON COUNTY WILL CONTINUE TO EXPERIENCE FLOODING FOR THE NEXT FEW HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3898 9454 3891 9445 3881 9471 3888 9475 $$ SAW
454 WGUS73 KEAX 070655 RRA FFSEAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 155 AM CDT MON MAY 7 2012 KSC091-MOC095-070710- /O.EXP.KEAX.FF.W.0006.000000T0000Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JOHNSON KS-JACKSON MO- 155 AM CDT MON MAY 7 2012 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EAST CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS...AND SOUTHWESTERN JACKSON COUNTY IN WEST CENTRAL MISSOURI WILL BE ALLOWED TO EXPIRE AT 200 AM CDT... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 3898 9454 3891 9445 3881 9471 3888 9475 $$ ACH
The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:04 PM CDT | Flash Flood Warning | EAX | Johnson | 7 hr |
| May 6, 7:08 PM CDT | Severe Thunderstorm Warning | EAX | Johnson | 37 min |
| May 6, 7:23 PM CDT | Severe Thunderstorm Warning | EAX | Johnson, Miami | 24 min |
| May 6, 8:06 PM CDT | Special Weather Statement | EAX | Johnson | 9 min |
| May 6, 8:08 PM CDT | Special Weather Statement | EAX | Miami | 37 min |
| May 6, 8:39 PM CDT | Special Weather Statement | EAX | Miami | 21 min |
| May 6, 8:44 PM CDT | River Flood Warning | EAX | Johnson | 3 hr |
| May 6, 9:07 PM CDT | Severe Thunderstorm Warning | EAX | Miami | 23 min |
| May 6, 7:14 PM CDT | Special Weather Statement | EAX | Pettis | 46 min |
| May 6, 7:28 PM CDT | Areal Flood Advisory | EAX | Caldwell, Clinton | 4 hr |
| May 6, 7:59 PM CDT | Special Weather Statement | EAX | Saline | 46 min |
| May 6, 8:20 PM CDT | Special Weather Statement | EAX | Ray | 10 min |
| May 6, 8:21 PM CDT | Special Weather Statement | EAX | Pettis | 24 min |
| May 6, 8:23 PM CDT | Special Weather Statement | EAX | Chariton, Howard | 37 min |
| May 6, 8:46 PM CDT | River Flood Warning | EAX | Ray | 40 hr |
| May 6, 9:55 PM CDT | Special Weather Statement | EAX | Cooper | 50 min |
| May 6, 10:39 PM CDT | River Flood Warning | EAX | Cass, Henry, Johnson | 26 hr |
| May 6, 10:39 PM CDT | River Flood Warning | EAX | Bates, Cass, Henry | 11 hr |
| May 6, 11:30 PM CDT | Areal Flood Warning | EAX | Cass, Jackson | 11 hr |
| May 7, 12:22 AM CDT | Special Weather Statement | EAX | Johnson | 23 min |
Nearby
Flash Flood Warnings in Kansas, 2012Flash Flood Warnings in Missouri, 2012Every flash flood warning in 2012
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.