Alert archive / Wisconsin / Flash Flood Warnings in 2017
Flash Flood Warning 6, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood warning at Jul 21, 2017, 7:02 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 5 hr. 3 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
- Jul 21, 2017, 7:02 PM CDT (00:02 UTC)
- Expired
- Jul 22, 2017, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Iowa County, WI, Lafayette County, WI
The radar
The Quad Cities radar (KDVN), 133 km from the middle of the area, began a volume at 00:06 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 |
|---|---|---|---|
| Jul 21, 8:15 PM CDT | HEAVY RAIN 2.2 | 3 S South Wayne, WI | 0.5 FROM 1-6PM, 0.5 FROM 6-7PM, 1.2 FROM 7-815PM. |
| Jul 21, 10:31 PM CDT | HEAVY RAIN 3 | Darlington, WI | MULTIPLE ROADS HAVE A FEW INCHES OF STANDING WATER ON THEM. MORE SO IN THE SOUTH AND WEST PORTIONS OF THE COUNTY. NO ADDITIONAL INFORMATION AT THIS TIME. |
| Jul 21, 11:54 PM CDT | HEAVY RAIN 3.79 | 4 S Benton, WI | TOTAL SO FAR SINCE 2 PM CDT TODAY. MESONET STATION BUNW3, 2 NW COUNCIL HILL, RIVER GAUGE. |
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, 0.0 hours before the alert went out and 254 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1887 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
815 WGUS53 KMKX 220002 FFWMKX WIC049-065-220500- /O.NEW.KMKX.FF.W.0006.170722T0002Z-170722T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Milwaukee/Sullivan WI 702 PM CDT FRI JUL 21 2017 The National Weather Service in Milwaukee/Sullivan has issued a * Flash Flood Warning for... Lafayette County in south central Wisconsin... Southern Iowa County in south central Wisconsin... * Until midnight CDT * At 701 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to two inches of rain have already fallen. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 4295 9043 4293 8984 4251 8984 4251 9043 $$ DAVIS
3 follow-up statements
753 WGUS73 KMKX 220055 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 755 PM CDT FRI JUL 21 2017 WIC049-065-220500- /O.CON.KMKX.FF.W.0006.000000T0000Z-170722T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI-Iowa WI- 755 PM CDT FRI JUL 21 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR LAFAYETTE AND SOUTHERN IOWA COUNTIES... At 754 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to three inches of rain have already fallen. Flash flooding is expected to begin shortly. Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. Additional rainfall amounts of 2 inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 4295 9043 4293 8984 4251 8984 4251 9043 $$ HENTZ
679 WGUS73 KMKX 220146 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 846 PM CDT FRI JUL 21 2017 WIC049-065-220500- /O.CON.KMKX.FF.W.0006.000000T0000Z-170722T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI-Iowa WI- 846 PM CDT FRI JUL 21 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR LAFAYETTE AND SOUTHERN IOWA COUNTIES... At 842 PM CDT, Doppler radar indicated the thunderstorms producing heavy rain across the warned area were moving off. Up to 3.5 inches of rain has already fallen over much of far southwest Iowa, western and portions of southern Lafayette county. Flash flooding is expected. Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. Additional rainfall amounts of less than an inch is expected through 11 pm. However runoff from the heavy rain will continue. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 4295 9043 4293 8984 4251 8984 4251 9043 $$ HENTZ
700 WGUS73 KMKX 220250 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 950 PM CDT FRI JUL 21 2017 WIC049-065-220500- /O.CON.KMKX.FF.W.0006.000000T0000Z-170722T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI-Iowa WI- 950 PM CDT FRI JUL 21 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR LAFAYETTE AND SOUTHERN IOWA COUNTIES... At 947 PM CDT, Doppler radar indicated thunderstorms developing just west and southwest of the warned area. Up to 3.5 inches of rain has already fallen over much of far southwest Iowa, western and portions of southern Lafayette county. Flash flooding is expected. Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. Additional rainfall amounts of around an inch are possible in the warned area by midnight. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 4295 9043 4293 8984 4251 8984 4251 9043 $$ HENTZ
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:08 PM CDT | Special Weather Statement | MKX | Green | 37 min |
| Jul 21, 7:12 PM CDT | Special Weather Statement | MKX | Walworth | 33 min |
| Jul 21, 7:50 PM CDT | Special Weather Statement | MKX | Dane | 25 min |
| Jul 21, 8:15 PM CDT | Special Weather Statement | MKX | Dane | 30 min |
| Jul 21, 8:41 PM CDT | Special Weather Statement | MKX | Jefferson, Rock | 34 min |
| Jul 21, 9:07 PM CDT | River Flood Warning | MKX | Lafayette | 65 hr |
| Jul 21, 9:07 PM CDT | River Flood Warning | MKX | Rock | 54 hr |
| Jul 21, 9:07 PM CDT | River Flood Warning | MKX | Rock | 70 hr |
| Jul 21, 9:34 PM CDT | River Flood Warning | MKX | Racine | 63 hr |
| Jul 21, 10:54 PM CDT | Flash Flood Warning | MKX | Iowa, Lafayette | 11 hr |
| Jul 21, 11:34 PM CDT | Special Weather Statement | MKX | Lafayette | 26 min |
| Jul 22, 10:08 AM CDT | Areal Flood Warning | MKX | Lafayette | 6 hr |
| Jul 22, 10:57 AM CDT | River Flood Watch | MKX | Green | 38 hr |
| Jul 22, 3:43 PM CDT | Areal Flood Warning | MKX | Lafayette | 18 hr |
| Jul 22, 6:39 PM CDT | River Flood Warning | MKX | Green | 30 hr |
Nearby
Flash Flood Warnings in Wisconsin, 2017Every flash flood warning in 2017
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.