Alert archive / Minnesota / Flash Flood Warnings in 2025

Flash Flood Warning 10, NWS Duluth, MN

July 23, 2025Lake County, Saint Louis County, Minnesota

NWS Duluth, MN issued this flash flood warning at Jul 23, 2025, 10:42 AM CDT for Lake County, Saint Louis County, Minnesota. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 23, 2025, 10:42 AM CDT (15:42 UTC)
Expired
Jul 23, 2025, 12:55 PM CDT
In force
2 hr
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Flood severity
None

Counties Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 15:46 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, 3.7 hours before the alert went out and 327 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2025-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1331 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2025-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1331 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
670 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

Open this sounding in Storm Lab

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 3:05 AM CDTAreal Flood AdvisoryDLHCook3 hr
Jul 23, 5:05 AM CDTAreal Flood AdvisoryDLHItasca, Saint Louis5 hr
Jul 23, 7:15 AM CDTSevere Thunderstorm WarningDLHCass39 min
Jul 23, 8:19 AM CDTAreal Flood AdvisoryDLHCass, Itasca4 hr
Jul 23, 8:37 AM CDTSevere Thunderstorm WarningDLHItasca, Saint Louis38 min
Jul 23, 9:48 AM CDTAreal Flood AdvisoryDLHLake, Saint Louis5 hr
Jul 23, 10:29 AM CDTAreal Flood WarningDLHItasca, Saint Louis2 hr
Jul 23, 11:51 AM CDTAreal Flood AdvisoryDLHPine5 hr
Jul 23, 12:38 PM CDTAreal Flood AdvisoryDLHCarlton, Pine6 hr
Jul 23, 12:52 PM CDTAreal Flood AdvisoryDLHItasca, Saint Louis83 min
Jul 23, 12:55 PM CDTAreal Flood AdvisoryDLHLake, Saint Louis37 min
Jul 23, 1:29 PM CDTAreal Flood AdvisoryDLHCook4 hr

Nearby

Flash Flood Warnings in Minnesota, 2025Every flash flood warning in 2025

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.