Alert archive / Minnesota / Flash Flood Warnings in 2018
Flash Flood Warning 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 12, 2018, 5:35 PM CDT for 4 counties in Minnesota. It was in force for 3 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
- Jul 12, 2018, 5:35 PM CDT (22:35 UTC)
- Expired
- Jul 12, 2018, 8:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lincoln County, MN, Lyon County, MN, Murray County, MN, Pipestone County, MN
The radar
The Sioux Falls radar (KFSD), 99 km from the middle of the area, began a volume at 22:39 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
Minneapolis, MN (KMPX), launched 12:00Z, 10.6 hours before the alert went out and 191 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
- 745 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 387 m²/s²
- 0-3 km storm-relative helicity
- 437 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.3
The text
As transmitted.
927 WGUS53 KFSD 122235 FFWFSD MNC081-083-101-117-130130- /O.NEW.KFSD.FF.W.0021.180712T2235Z-180713T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Sioux Falls SD 535 PM CDT THU JUL 12 2018 The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southern Lyon County in southwestern Minnesota... Southeastern Lincoln County in southwestern Minnesota... Northeastern Pipestone County in southwestern Minnesota... Northwestern Murray County in southwestern Minnesota... * Until 830 PM CDT. * At 534 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. 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. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 4414 9559 4405 9622 4431 9623 4443 9559 $$ Gillispie
2 follow-up statements
969 WGUS73 KFSD 130009 FFSFSD Flash Flood Statement National Weather Service Sioux Falls SD 709 PM CDT THU JUL 12 2018 MNC081-083-101-117-130130- /O.CON.KFSD.FF.W.0021.000000T0000Z-180713T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lyon MN-Lincoln MN-Pipestone MN-Murray MN- 709 PM CDT THU JUL 12 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR SOUTHERN LYON...SOUTHEASTERN LINCOLN...NORTHEASTERN PIPESTONE AND NORTHWESTERN MURRAY COUNTIES... At 707 PM CDT, Doppler radar indicated that the heavy rain had moved out of the warned area. However, runoff from the earlier storms will continue for some time, and additional scattered showers and thunderstorms could redevelop through this evening. Up to three inches of rain have already fallen. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 4414 9559 4405 9622 4431 9623 4443 9559 $$ Gillispie
945 WGUS73 KFSD 130130 FFSFSD Flash Flood Statement National Weather Service Sioux Falls SD 830 PM CDT THU JUL 12 2018 MNC081-083-101-117-130140- /O.EXP.KFSD.FF.W.0021.000000T0000Z-180713T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lyon MN-Lincoln MN-Pipestone MN-Murray MN- 830 PM CDT THU JUL 12 2018 ...THE FLASH FLOOD WARNING FOR SOUTHERN LYON...SOUTHEASTERN LINCOLN...NORTHEASTERN PIPESTONE AND NORTHWESTERN MURRAY COUNTIES HAS EXPIRED... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4414 9559 4405 9622 4431 9623 4443 9559 $$ Hanko
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 4:47 AM CDT | Flash Flood Watch | FSD | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more | 26 hr |
| Jul 12, 5:08 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone, Rock | 52 min |
| Jul 12, 5:42 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Pipestone | 33 min |
Nearby
Flash Flood Warnings in Minnesota, 2018Every flash flood warning in 2018
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.