Alert archive / Kansas / Flash Flood Warnings in 2012
Flash Flood Warning 5, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at May 6, 2012, 7:04 PM CDT for Johnson County, Kansas. It was in force for 7 hr. 1 report 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 6, 2012, 7:04 PM CDT (00:04 UTC)
- Expired
- May 7, 2012, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Johnson County, KS
The radar
The Pleasant Hill radar (KEAX), 44 km from the middle of the area, began a volume at 00:05 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 6, 7:40 PM CDT | FLASH FLOOD | Olathe, KS | NUMEROUS STREETS FLOODED |
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 00:00Z, 0.1 hours before the alert went out and 78 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.
808 WGUS53 KEAX 070004 FFWEAX KSC091-070700- /O.NEW.KEAX.FF.W.0005.120507T0004Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 704 PM CDT SUN MAY 6 2012 THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS... * UNTIL 200 AM CDT MONDAY * AT 701 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. DOPPLER RADAR ESTIMATES RAINFALL RATES UP TO 2 INCHES PER HOUR WITH THESE STORMS. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... LENEXA AND OLATHE. THIS WILL IMPACT THE FOLLOWING INTERSTATES... I-35 BETWEEN MILE MARKERS 214 AND 226. I-435 LOOP FROM MILE MARKERS 0 TO 1...78 TO 83. PRECAUTIONARY/PREPAREDNESS ACTIONS... ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE THIS EVENING IN THE WARNED AREA. EARLIER THUNDERSTORMS THIS MORNING PRODUCED BETWEEN 1 AND 2 INCHES OF RAINFALL OVER PARTS OF THE WARNED AREA. ALL OF THIS RAINFALL WILL LIKELY RESULT IN FLASH FLOODING CONDITIONS THIS EVENING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 3900 9469 3890 9464 3882 9483 3889 9489 $$ MJ
2 follow-up statements
927 WGUS73 KEAX 070226 FFSEAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 926 PM CDT SUN MAY 6 2012 KSC091-070700- /O.CON.KEAX.FF.W.0005.000000T0000Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JOHNSON KS- 926 PM CDT SUN MAY 6 2012 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS UNTIL 200 AM CDT... AT 920 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS HAD PUSHED SOUTH OF THE WARNED AREA. RAINFALL AMOUNTS RANGING FROM 3...TO NEARLY 5 INCHES WERE COMMON FROM THE EARLIER THUNDERSTORMS. ADDITIONAL SCATTERED THUNDERSTORMS ARE LIKELY DURING THE OVERNIGHT HOURS. RAINFALL AMOUNTS FROM THESE STORMS IS EXPECTED TO BE AROUND A QUARTER OF AN INCH. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...LENEXA...OVERLAND PARK AND OLATHE. IN ADDITION...FLOODING IS EXPECTED WITHIN THE INDIAN CREEK BASIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 3900 9469 3890 9464 3882 9483 3889 9489 $$ SAW
823 WGUS73 KEAX 070655 FFSEAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 155 AM CDT MON MAY 7 2012 KSC091-070709- /O.EXP.KEAX.FF.W.0005.000000T0000Z-120507T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JOHNSON KS- 155 AM CDT MON MAY 7 2012 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS 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 3900 9469 3890 9464 3882 9483 3889 9489 $$ ACH
The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:08 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, 8:18 PM CDT | Flash Flood Warning | EAX | Johnson | 6 hr |
| 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 |
Nearby
Flash Flood Warnings in Kansas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.