Alert archive / Wisconsin / Flash Flood Warnings in 2023

Flash Flood Warning 2, NWS Twin Cities, MN

July 3, 2023Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jul 3, 2023, 7:34 PM CDT for Saint Croix County, Wisconsin. It was in force for 101 min. 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 3, 2023, 7:34 PM CDT (00:34 UTC)
Expired: Jul 3, 2023, 9:15 PM CDT
In force: 101 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

County Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 106 km from the middle of the area, began a volume at 00:35 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, 0.6 hours before the alert went out and 109 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3291 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1395 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

646 
WGUS53 KMPX 040034
FFWMPX
WIC109-040230-
/O.NEW.KMPX.FF.W.0002.230704T0034Z-230704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
734 PM CDT Mon Jul 3 2023

The National Weather Service in the Twin Cities has issued a

* Flash Flood Warning for...
  Central St. Croix County in west central Wisconsin...

* Until 930 PM CDT.

* At 734 PM CDT, trained weather spotters reported thunderstorms 
  producing heavy rain across the warned area. Between 2 and 3 
  inches of rain have fallen. Additional rainfall amounts of 1 to 3 
  inches are possible in the warned area. Flash flooding is ongoing 
  or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Trained spotters reported over 2 inches of rainfall in
           Hammond.

  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...
  Baldwin, Hammond, Roberts, Woodville, Glenwood City, Emerald, 
  Wilson, Hersey, Houlton and Boardman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4493 9214 4494 9261 4509 9261 4508 9214
      4507 9214 4506 9214 4505 9214 4500 9214
      4495 9214

FLASH FLOOD...OBSERVED

$$

CTG

1 follow-up statement

644 
WGUS73 KMPX 040215
FFSMPX

Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
915 PM CDT Mon Jul 3 2023

WIC109-040225-
/O.CAN.KMPX.FF.W.0002.000000T0000Z-230704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Croix WI-
915 PM CDT Mon Jul 3 2023

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL ST. CROIX COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4493 9214 4494 9261 4509 9261 4508 9214
      4507 9214 4506 9214 4505 9214 4500 9214
      4495 9214

$$

CTG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:14 PM CDT	Severe Thunderstorm Warning	MPX	Pierce	46 min
Jul 4, 10:57 AM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	33 min
Jul 4, 11:43 AM CDT	Special Weather Statement	MPX	Saint Croix	32 min
Jul 4, 12:08 PM CDT	Special Weather Statement	MPX	Barron	37 min
Jul 4, 6:28 PM CDT	Tornado Warning	MPX	Pepin, Pierce	32 min

Nearby

Flash Flood Warnings in Wisconsin, 2023 Every flash flood warning in 2023

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.