Alert archive / Wisconsin / Flash Flood Warnings in 2017
Flash Flood Warning 7, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood warning at Jul 21, 2017, 10:54 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 11 hr. 9 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, 10:54 PM CDT (03:54 UTC)
- Expired
- Jul 22, 2017, 10:00 AM CDT
- In force
- 11 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 03:57 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, 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. |
| Jul 22, 12:30 AM CDT | HEAVY RAIN 5.02 | 4 S Benton, WI | UPDATED RAIN TOTAL. MESONET STATION BUNW3, 2 NW COUNCIL HILL. |
| Jul 22, 4:30 AM CDT | HEAVY RAIN 5.16 | 4 S Benton, WI | UPDATED STORM TOTAL. MESONET STATION BUNW3, 2 NW COUNCIL HILL. |
| Jul 22, 5:45 AM CDT | FLOOD | Darlington, WI | MAIN STREET CLOSED IN DARLINGTON DUE TO FLOODING. |
| Jul 22, 7:00 AM CDT | HEAVY RAIN 2.45 | 2 Ne Darlington, WI | |
| Jul 22, 7:00 AM CDT | HEAVY RAIN 4.84 | Benton, WI | |
| Jul 22, 9:14 AM CDT | HEAVY RAIN 3.35 | 4 Sw South Wayne, WI | |
| Jul 22, 9:15 AM CDT | HEAVY RAIN 5.18 | 4 S Benton, WI | MEASURED VIA THE GALENA RIVER DCP. |
| Jul 22, 9:31 AM CDT | FLASH FLOOD | Darlington, WI | THE BRIDGE IN DARLINGTON ON HWY 23 WAS CLOSED DUE TO FLOODING. THAT AREA RECEIVED ABOUT 2 TO 3 INCHES OF RAIN OVERNIGHT. |
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, 3.9 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.
485 WGUS53 KMKX 220354 FFWMKX WIC049-065-221000- /O.NEW.KMKX.FF.W.0007.170722T0354Z-170722T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Milwaukee/Sullivan WI 1054 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 500 AM CDT Saturday * At 1053 PM CDT, Doppler radar indicated more thunderstorms producing heavy rain headed for the warned area. Up to 4 inches of rain have already fallen. 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 1 to 3 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 9042 4293 8984 4251 8984 4251 9043 $$ HENTZ
4 follow-up statements
144 WGUS73 KMKX 220522 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 1222 AM CDT SAT JUL 22 2017 WIC049-065-221000- /O.CON.KMKX.FF.W.0007.000000T0000Z-170722T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI-Iowa WI- 1222 AM CDT SAT JUL 22 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR LAFAYETTE AND SOUTHERN IOWA COUNTIES... At 1218 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area has once again pushed off to the south. Up to 6 inches of rain has fallen over southwest Lafayette county with around 3 inches in far southwest Iowa county. Flash flooding is expected to continue, especially in southwest Lafayette county. Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. Additional rainfall amounts of 1 to 2 inches are possible in the warned area as more thunderstorms were occuring over northeast Iowa and were pushing to the east. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 4295 9042 4293 8984 4251 8984 4251 9043 $$ HENTZ
261 WGUS73 KMKX 220710 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 210 AM CDT SAT JUL 22 2017 WIC049-065-221000- /O.CON.KMKX.FF.W.0007.000000T0000Z-170722T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI-Iowa WI- 210 AM CDT SAT JUL 22 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR LAFAYETTE AND SOUTHERN IOWA COUNTIES... At 207 AM CDT, Doppler radar and automated rain gauges indicated that heavy rain of 3 to 6 inches has fallen over the area. Up to an additional one half inch of rain is possible over the next hour. Flash flooding is already occurring. 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. 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. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. && LAT...LON 4295 9042 4293 8984 4251 8984 4251 9043 $$ SPM
963 WGUS53 KMKX 220953 FFWMKX WIC049-065-221500- /O.EXT.KMKX.FF.W.0007.000000T0000Z-170722T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Milwaukee/Sullivan WI 453 AM CDT SAT JUL 22 2017 The National Weather Service in Milwaukee/Sullivan has extended the * Flash Flood Warning for... Lafayette County in south central Wisconsin... Southern Iowa County in south central Wisconsin... * Until 1000 AM CDT * At 447 AM CDT, Doppler radar and automated rain gauges indicated that heavy rain of 3 to 6 inches has fallen over the area. Additional rainfall of up to an inch is possible this morning. Flash flooding is ongoing in the warned area. * Some locations that will experience flooding include... Mineral Point, Darlington, Shullsburg, Belmont, Benton, Argyle, Blanchardville, Somers, Wiota, Linden, New Diggings, South Wayne, Lamont, Rewey, Hollandale, Gratiot, Yellowstone Lake St Park, Platte Mounds, Lead Mine and London. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. && LAT...LON 4295 9042 4293 8984 4251 8984 4251 9043 $$ SPM
193 WGUS73 KMKX 221430 FFSMKX Flash Flood Statement National Weather Service Milwaukee/Sullivan WI 930 AM CDT SAT JUL 22 2017 WIC049-221439- /O.CAN.KMKX.FF.W.0007.000000T0000Z-170722T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Iowa WI- 930 AM CDT SAT JUL 22 2017 ...THE FLASH FLOOD WARNING FOR SOUTHERN IOWA COUNTY IS CANCELLED... Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4278 9042 4273 8984 4251 8984 4251 9043 $$ WIC065-221500- /O.CON.KMKX.FF.W.0007.000000T0000Z-170722T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lafayette WI- 930 AM CDT SAT JUL 22 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT FOR LAFAYETTE COUNTY... At 929 AM CDT, The rain has ended but some flooding continues, so we'll allow this warning to continue until it expires at 10 am. Rainfall amounts ranged from about 1 1/2 inches in southern Iowa and northern Lafayette counties to 4 to 6 inches in southwest Lafayette county. County law enforcement reported that the bridge in Darlington on highway 23 was closed due to flooding. Some locations that will experience flooding include... Darlington, Shullsburg, Belmont, Benton, Argyle, Somers, Wiota, New Diggings, South Wayne, Lamont, Gratiot, Platte Mounds, Lead Mine, Leslie and Woodford. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 4278 9042 4273 8984 4251 8984 4251 9043 $$ DAVIS
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:02 PM CDT | Flash Flood Warning | MKX | Iowa, Lafayette | 5 hr |
| 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, 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.