Alert archive / Minnesota / Flash Flood Warnings in 2020
Flash Flood Warning 11, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Jul 25, 2020, 8:54 PM CDT for 4 counties in Minnesota. It was in force for 8 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 25, 2020, 8:54 PM CDT (01:54 UTC)
- Expired
- Jul 26, 2020, 5:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Brown County, MN, Nicollet County, MN, Renville County, MN, Sibley County, MN
The radar
The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 01:56 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 00:00Z, 1.9 hours before the alert went out and 101 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
- 1584 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 935 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 363 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 12.8
The text
As transmitted.
491
WGUS53 KMPX 260154
FFWMPX
MNC015-103-129-143-260800-
/O.NEW.KMPX.FF.W.0011.200726T0154Z-200726T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
854 PM CDT Sat Jul 25 2020
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
Southeastern Renville County in central Minnesota...
Southwestern Sibley County in central Minnesota...
Northeastern Brown County in south central Minnesota...
Northwestern Nicollet County in south central Minnesota...
* Until 300 AM CDT Sunday.
* At 854 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Additional rainfall amounts of 1 to 3 inches are possible.
* Some locations that will experience flash flooding include...
Fairfax, Gibbon, Franklin and St George.
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 4450 9487 4451 9487 4451 9488 4452 9488
4451 9489 4452 9489 4452 9490 4462 9486
4460 9442 4437 9445 4436 9452 4442 9487
FLASH FLOOD...RADAR INDICATED
$$
CTG2 follow-up statements
606
WGUS53 KMPX 260733
FFWMPX
MNC015-103-129-143-261000-
/O.EXT.KMPX.FF.W.0011.000000T0000Z-200726T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
233 AM CDT Sun Jul 26 2020
The National Weather Service in the Twin Cities has extended the
* Flash Flood Warning for...
Southeastern Renville County in central Minnesota...
Southwestern Sibley County in central Minnesota...
Northeastern Brown County in south central Minnesota...
Northwestern Nicollet County in south central Minnesota...
* Until 500 AM CDT.
* At 233 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
3 and 7 inches of rain have fallen. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Additional rainfall amounts of 1 to 3 inches are possible.
* Some locations that will experience flash flooding include...
Fairfax, Gibbon, Franklin and St George.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
Please report flooding to your local law enforcement agency or the
National Weather Service in the Twin Cities when you can do so
safely.
&&
LAT...LON 4450 9487 4451 9487 4451 9488 4452 9488
4451 9489 4452 9489 4452 9490 4462 9486
4460 9442 4437 9445 4436 9452 4442 9487
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
TDH921
WGUS73 KMPX 260953
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
453 AM CDT Sun Jul 26 2020
MNC015-103-129-143-261003-
/O.EXP.KMPX.FF.W.0011.000000T0000Z-200726T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brown MN-Nicollet MN-Renville MN-Sibley MN-
453 AM CDT Sun Jul 26 2020
...FLASH FLOOD WARNING WILL EXPIRE AT 5 AM CDT EARLY THIS MORNING
FOR SOUTHEASTERN RENVILLE, SOUTHWESTERN SIBLEY, NORTHEASTERN BROWN
AND NORTHWESTERN NICOLLET COUNTIES...
Flooding continues to pose a threat and a new warning will be
issued. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 800 AM CDT for portions
of east central Minnesota...south central Minnesota and southeast
Minnesota.
LAT...LON 4450 9487 4451 9487 4451 9488 4452 9488
4451 9489 4452 9489 4452 9490 4462 9486
4460 9442 4437 9445 4436 9452 4442 9487
$$
TDHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:08 PM CDT | Special Weather Statement | MPX | Nicollet | 52 min |
| Jul 25, 7:20 PM CDT | Tornado Warning | MPX | Nicollet, Sibley | 25 min |
| Jul 25, 8:15 PM CDT | Special Weather Statement | MPX | Le Sueur, Nicollet, Sibley | 2 hr |
| Jul 25, 8:20 PM CDT | Flash Flood Warning | MPX | Le Sueur, Nicollet, Scott, Sibley | 6 hr |
| Jul 25, 9:18 PM CDT | Flash Flood Watch | MPX | Blue Earth, Brown, Dakota, Goodhue, Le Sueur, Nicollet and 5 more | 12 hr |
| Jul 25, 9:34 PM CDT | Flash Flood Warning | MPX | Blue Earth, Le Sueur, Nicollet, Rice | 6 hr |
| Jul 26, 2:22 AM CDT | Special Weather Statement | MPX | Renville | 38 min |
| Jul 26, 2:24 AM CDT | Flash Flood Warning | MPX | Le Sueur, Nicollet, Scott, Sibley | 5 hr |
| Jul 26, 2:26 AM CDT | Special Weather Statement | MPX | Douglas, Pope, Stevens | 34 min |
| Jul 26, 2:44 AM CDT | Special Weather Statement | MPX | Lac qui Parle, Swift | 31 min |
| Jul 26, 3:01 AM CDT | Special Weather Statement | MPX | Douglas, Pope, Todd | 44 min |
| Jul 26, 3:10 AM CDT | Flash Flood Warning | MPX | Blue Earth, Le Sueur, Nicollet, Rice, Waseca | 5 hr |
| Jul 26, 3:18 AM CDT | Special Weather Statement | MPX | Chippewa, Lac qui Parle, Swift | 27 min |
| Jul 26, 3:45 AM CDT | Special Weather Statement | MPX | Todd | 30 min |
| Jul 26, 4:30 AM CDT | Special Weather Statement | MPX | Benton, Stearns | 30 min |
| Jul 26, 4:57 AM CDT | Flash Flood Warning | MPX | Brown, Nicollet, Redwood, Renville, Sibley | 3 hr |
| Jul 26, 8:04 AM CDT | Areal Flood Warning | MPX | Blue Earth, Brown, Le Sueur, Nicollet, Redwood, Renville and 2 more | 9 hr |
Nearby
Flash Flood Warnings in Minnesota, 2020Every flash flood warning in 2020
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.