Alert archive / Minnesota / Flash Flood Warnings in 2026
Flash Flood Warning 10, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Sep 18, 2026, 10:59 PM CDT for 5 counties in Minnesota. It was in force for 2 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
- Sep 18, 2026, 10:59 PM CDT (03:59 UTC)
- Expired
- Sep 19, 2026, 1:00 AM CDT
- In force
- 2 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Blue Earth County, MN, Faribault County, MN, Freeborn County, MN, Steele County, MN, Waseca County, MN
The radar
The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 04:02 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 |
|---|---|---|---|
| Sep 18, 11:15 PM CDT | FLASH FLOOD | 3 S Waldorf, MN | Water reported across road at the intersection of Highways 30 and 83. |
| Sep 18, 11:15 PM CDT | FLASH FLOOD | New Richland, MN | Water up to the bumpers of cars in intersections reported in New Richland. |
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, 4.0 hours before the alert went out and 113 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 470 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 447 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
547
WGUS53 KMPX 190359
FFWMPX
MNC013-043-047-147-161-190600-
/O.NEW.KMPX.FF.W.0010.260919T0359Z-260919T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
1059 PM CDT Fri Sep 18 2026
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
Southeastern Blue Earth County in south central Minnesota...
Northeastern Faribault County in south central Minnesota...
Northwestern Freeborn County in south central Minnesota...
Southwestern Steele County in south central Minnesota...
Southern Waseca County in south central Minnesota...
* Until 100 AM CDT.
* At 1059 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 5 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 0.5 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
* Some locations that will experience flash flooding include...
New Richland, Ellendale, Minnesota Lake, Geneva, Hartland and
Matawan.
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 4385 9406 4391 9355 4388 9319 4378 9325
4380 9365 4379 9404
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
NDC1 follow-up statement
372
WGUS73 KMPX 190426
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1126 PM CDT Fri Sep 18 2026
MNC013-043-047-147-161-190600-
/O.CON.KMPX.FF.W.0010.000000T0000Z-260919T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blue Earth MN-Faribault MN-Freeborn MN-Steele MN-Waseca MN-
1126 PM CDT Fri Sep 18 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM CDT SATURDAY FOR
SOUTHEASTERN BLUE EARTH, NORTHEASTERN FARIBAULT, NORTHWESTERN
FREEBORN, SOUTHWESTERN STEELE AND SOUTHERN WASECA COUNTIES...
At 1126 PM CDT, local law enforcement reported thunderstorms
producing heavy rain in southern Waseca county along MN Highway 30
and in New Richland. Between 2 and 5 inches of rain have fallen. The
expected rainfall rate is 1 to 2 inches in 1 hour. Additional
rainfall amounts of 0.5 to 2 inches are possible in the warned area.
Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
New Richland, Ellendale, Minnesota Lake, Geneva, Hartland and
Matawan.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4385 9406 4391 9355 4388 9319 4378 9325
4380 9365 4379 9404
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MPGThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 1:07 AM CDT | Flash Flood Warning | MPX | Faribault, Freeborn, Steele, Waseca | 4 hr |
| Sep 19, 10:17 AM CDT | Areal Flood Warning | MPX | Waseca | 5 hr |
Nearby
Flash Flood Warnings in Minnesota, 2026Every flash flood warning in 2026
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.