Alert archive / Wisconsin / Flash Flood Warnings in 2015
Flash Flood Warning 4, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood warning at Sep 17, 2015, 9:11 PM CDT for Jefferson County, Wisconsin. It was in force for 3 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
- Sep 17, 2015, 9:11 PM CDT (02:11 UTC)
- Expired
- Sep 18, 2015, 12:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Flood severity
- None
County Jefferson County, WI
The radar
The Milwaukee radar (KMKX), 18 km from the middle of the area, began a volume at 02:13 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 |
|---|---|---|---|
| Sep 17, 9:20 PM CDT | FLASH FLOOD | Jefferson, WI | MAIN STREET AND COLLINS ROAD. WATER UP TO THE BUMPER ON SOME CARS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.2 hours before the alert went out and 172 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
- 626 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 884 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
683
WGUS53 KMKX 180211
FFWMKX
WIC055-180515-
/O.NEW.KMKX.FF.W.0004.150918T0211Z-150918T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
911 PM CDT THU SEP 17 2015
THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL JEFFERSON COUNTY IN SOUTHEASTERN WISCONSIN...
* UNTIL 1215 AM CDT
* AT 910 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAIN
HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FORT ATKINSON...JEFFERSON...LAKE MILLS...JOHNSON CREEK...PALMYRA...
LAKE RIPLEY...LAKE KOSHKONONG...ROME...MILFORD...HEBRON...
BUSSEYVILLE AND HELENVILLE.
ADDITIONAL RAINFALL AMOUNTS OF AROUND 1 INCH ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4310 8865 4286 8856 4287 8899 4311 8900
$$
DAVIS2 follow-up statements
997 WGUS73 KMKX 180333 FFSMKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1033 PM CDT THU SEP 17 2015 WIC055-180515- /O.CON.KMKX.FF.W.0004.000000T0000Z-150918T0515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JEFFERSON WI- 1033 PM CDT THU SEP 17 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR CENTRAL JEFFERSON COUNTY... AT 1030 PM CDT...DOPPLER RADAR SHOWS THUNDERSTORMS HAVE WEAKENED ACROSS THE AREA...BUT MORE ARE STILL OFF TO THE WEST AND SHOULD MOVE THROUGH BEFORE MIDNIGHT. TOTAL RAINFALL ESTIMATES ARE UP TO AROUND 3 INCHES WITH ANOTHER 1/2 INCH POSSIBLE BEFORE ALL THE STORMS WEAKEN AFTER MIDNIGHT. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... FORT ATKINSON...JEFFERSON...LAKE MILLS...JOHNSON CREEK...PALMYRA... LAKE RIPLEY...LAKE KOSHKONONG...ROME...MILFORD...HEBRON...BUSSEYVILLE AND HELENVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. && LAT...LON 4310 8865 4286 8856 4287 8899 4311 8900 $$ DAVIS
210 WGUS73 KMKX 180438 FFSMKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1138 PM CDT THU SEP 17 2015 WIC055-180515- /O.CON.KMKX.FF.W.0004.000000T0000Z-150918T0515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ JEFFERSON WI- 1138 PM CDT THU SEP 17 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR CENTRAL JEFFERSON COUNTY... AT 1136 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE AND ONE HALF INCHES OF RAIN HAVE ALREADY FALLEN...WITH AN ADDITIONAL ONE HALF TO ONE INCH FROM ADDITIONAL THUNDERSTORMS MOVING THROUGH THE AREA. FLASH FLOODING IS EXPECTED. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... FORT ATKINSON...JEFFERSON...LAKE MILLS...JOHNSON CREEK...PALMYRA... LAKE RIPLEY...LAKE KOSHKONONG...ROME...MILFORD...HEBRON...BUSSEYVILLE AND HELENVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4310 8865 4286 8856 4287 8899 4311 8900 $$ WOOD
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 7:45 PM CDT | Tornado Warning | MKX | Lafayette | 15 min |
| Sep 17, 7:48 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 27 min |
| Sep 17, 7:51 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Rock, Walworth | 24 min |
| Sep 17, 7:57 PM CDT | Tornado Warning | MKX | Green, Lafayette | 33 min |
| Sep 17, 8:20 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Lafayette | 25 min |
| Sep 17, 8:40 PM CDT | Severe Thunderstorm Warning | MKX | Green | 35 min |
| Sep 17, 8:49 PM CDT | Areal Flood Advisory | MKX | Dane, Jefferson | 3 hr |
| Sep 17, 9:15 PM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 45 min |
| Sep 17, 10:01 PM CDT | Flash Flood Warning | MKX | Jefferson, Kenosha, Racine, Walworth, Waukesha | 3 hr |
| Sep 17, 10:49 PM CDT | Flash Flood Warning | MKX | Kenosha | 3 hr |
| Sep 17, 11:34 PM CDT | Areal Flood Advisory | MKX | Green, Rock | 116 min |
| Sep 17, 11:41 PM CDT | Special Marine Warning | MKX | 94 min | |
| Sep 18, 3:51 AM CDT | Flash Flood Watch | MKX | Dane, Green, Jefferson, Kenosha, Lafayette, Milwaukee and 4 more | 23 hr |
| Sep 18, 5:15 AM CDT | Small Craft Advisory | MKX | 35 hr |
Nearby
Flash Flood Warnings in Wisconsin, 2015Every flash flood warning in 2015
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.