Alert archive / Minnesota / Flash Flood Warnings in 2018
Flash Flood Warning 14, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 3, 2018, 2:20 AM CDT for Lyon County, Minnesota. It was in force for 11 hr. 2 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 3, 2018, 2:20 AM CDT (07:20 UTC)
- Expired
- Jul 3, 2018, 1:15 PM CDT
- In force
- 11 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
County Lyon County, MN
The radar
The Sioux Falls radar (KFSD), 112 km from the middle of the area, began a volume at 07:21 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 3, 8:28 AM CDT | FLASH FLOOD | Tracy, MN | MNDOT REPORTS HIGHWAY 14 CLOSED DUE TO FLOODING BETWEEN TRACY AND WALNUT GROVE. |
| Jul 3, 9:00 AM CDT | FLASH FLOOD | Tracy, MN | WATER OVER ROADS AND IN YARDS. VIA SOCIAL MEDIA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 7.3 hours before the alert went out and 178 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
- 654 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1535 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.0
The text
As transmitted.
442 WGUS53 KFSD 030720 FFWFSD MNC083-031315- /O.NEW.KFSD.FF.W.0014.180703T0720Z-180703T1315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Sioux Falls SD 220 AM CDT TUE JUL 3 2018 The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southeastern Lyon County in southwestern Minnesota... * Until 815 AM CDT. * At 220 AM 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... Tracy, Balaton and Garvin. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 4419 9560 4420 9589 4432 9578 4441 9560 $$ BT
3 follow-up statements
328 WGUS73 KFSD 030943 FFSFSD Flash Flood Statement National Weather Service Sioux Falls SD 443 AM CDT TUE JUL 3 2018 MNC083-031315- /O.CON.KFSD.FF.W.0014.000000T0000Z-180703T1315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lyon MN- 443 AM CDT TUE JUL 3 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR SOUTHEASTERN LYON COUNTY... At 442 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to six inches of rain have already fallen. Flash flooding is expected with additional rainfall across the area. Some locations that will experience flooding include... Tracy, Balaton and Garvin. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 4419 9560 4420 9589 4432 9578 4441 9560 $$ BT
778 WGUS73 KFSD 031122 FFSFSD Flash Flood Statement National Weather Service Sioux Falls SD 622 AM CDT TUE JUL 3 2018 MNC083-031315- /O.CON.KFSD.FF.W.0014.000000T0000Z-180703T1315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lyon MN- 622 AM CDT TUE JUL 3 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR SOUTHEASTERN LYON COUNTY... At 619 AM CDT, local law enforcement reported water over highway 14 between Tracy and Walnut Grove. Four to seven inches of rain have fallen. Flash flooding is occurring! Some locations that will experience flooding include... Tracy, Balaton and Garvin. Additional rainfall is expected in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4419 9560 4420 9589 4432 9578 4441 9560 $$ BT
271 WGUS53 KFSD 031237 FFWFSD MNC083-031815- /O.EXT.KFSD.FF.W.0014.000000T0000Z-180703T1815Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Sioux Falls SD 737 AM CDT TUE JUL 3 2018 The National Weather Service in Sioux Falls has extended the * Flash Flood Warning for... Southeastern Lyon County in southwestern Minnesota... * Until 115 PM CDT. * At 736 AM CDT, Doppler radar indicated heavy rain across the warned area. Six to eight inches of rain have fallen. Flash flooding is already occurring. Additional rainfall amounts of around an inch are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 4419 9560 4420 9589 4432 9578 4441 9560 $$ Gillispie
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 4:39 AM CDT | Flash Flood Warning | FSD | Lyon | 9 hr |
| Jul 3, 5:36 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray, Pipestone | 13 min |
| Jul 3, 6:37 AM CDT | Flash Flood Warning | FSD | Murray | 7 hr |
| Jul 3, 7:11 AM CDT | Flash Flood Warning | FSD | Cottonwood | 6 hr |
| Jul 3, 7:24 AM CDT | Flash Flood Warning | FSD | Pipestone | 6 hr |
| Jul 3, 7:50 AM CDT | Flash Flood Warning | FSD | Murray, Nobles, Pipestone, Rock | 5 hr |
| Jul 3, 8:28 AM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles | 47 min |
| Jul 3, 8:31 AM CDT | Flash Flood Warning | FSD | Murray, Nobles | 5 hr |
| Jul 3, 9:52 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 38 min |
| Jul 3, 10:05 AM CDT | River Flood Warning | FSD | Lyon | 4 days |
| Jul 3, 10:11 AM CDT | River Flood Warning | FSD | Rock | 53 hr |
| Jul 3, 11:42 AM CDT | River Flood Warning | FSD | Pipestone | 24 hr |
| Jul 3, 1:09 PM CDT | Areal Flood Warning | FSD | Cottonwood, Lyon, Murray, Pipestone | 24 hr |
| Jul 3, 6:37 PM CDT | River Flood Warning | FSD | Pipestone | 38 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.