Alert archive / Wisconsin / Flash Flood Warnings in 2020

Flash Flood Warning 3, NWS Twin Cities, MN

June 29, 20204 counties in Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jun 29, 2020, 2:04 AM CDT for 4 counties in Wisconsin. It was in force for 5 hr. 13 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: Jun 29, 2020, 2:04 AM CDT (07:04 UTC)
Expired: Jun 29, 2020, 7:00 AM CDT
In force: 5 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Barron County, WI, Dunn County, WI, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 101 km from the middle of the area, began a volume at 07:03 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
Jun 29, 2:33 AM CDT	FLASH FLOOD	Baldwin, WI	NUMEROUS ROADS FLOODED, ONE WASHED OUT.
Jun 29, 5:00 AM CDT	HEAVY RAIN 6.95	River Falls, WI	CO-OP OBSERVER STATION RVFW3 RIVER FALLS.
Jun 29, 5:15 AM CDT	FLASH FLOOD	Baldwin, WI	WATER RESCUES AND EVACUATION IN THE BALDWIN/HAMMOND/WOODVILLE AREA.
Jun 29, 5:31 AM CDT	HEAVY RAIN 6.04	1 Sw River Falls, WI
Jun 29, 6:00 AM CDT	FLASH FLOOD	Baldwin, WI	HWY 63 IMPASSABLE IN BALDWIN, COUNTY J IS SHUT DOWN.
Jun 29, 6:15 AM CDT	HEAVY RAIN 6.2	4 Wsw River Falls, WI	COCORAHS STATION WI-PC-26 RIVER FALLS 3.5 WSW.
Jun 29, 6:45 AM CDT	HEAVY RAIN 4.77	3 Nne Woodville, WI	COCORAHS STATION WI-SC-42 WOODVILLE 2.6 NNE.
Jun 29, 7:00 AM CDT	HEAVY RAIN 4.24	3 N Boyceville, WI	COCORAHS STATION WI-DN-1 BOYCEVILLE 3NNE.
Jun 29, 7:00 AM CDT	HEAVY RAIN 4.72	5 Ese Hudson, WI	COCORAHS STATION WI-SC-10 LAKE ST. CROIX BEACH 4E.
Jun 29, 7:00 AM CDT	HEAVY RAIN 6.05	1 S River Falls, WI	COCORAHS STATION WI-PC-13 RIVER FALLS 1S.
Jun 29, 7:00 AM CDT	HEAVY RAIN 6.57	1 Ssw River Falls, WI	COCORAHS STATION WI-PC-5 RIVER FALLS 1SW.
Jun 29, 7:00 AM CDT	HEAVY RAIN 6.92	1 S River Falls, WI	COCORAHS STATION WI-PC-10 RIVER FALLS 1S.
Jun 29, 7:00 AM CDT	HEAVY RAIN 7.25	1 Nnw River Falls, WI	COCORAHS STATION WI-SC-20 RIVER FALLS 1NW.

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, 7.1 hours before the alert went out and 103 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: 40 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

362 
WGUS53 KMPX 290704
FFWMPX
WIC005-033-093-109-291000-
/O.NEW.KMPX.FF.W.0003.200629T0704Z-200629T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
204 AM CDT Mon Jun 29 2020

The National Weather Service in the Twin Cities has issued a

* Flash Flood Warning for...
  Southwestern Barron County in northwestern Wisconsin...
  Northwestern Dunn County in west central Wisconsin...
  Northwestern Pierce County in west central Wisconsin...
  Central St. Croix County in west central Wisconsin...

* Until 500 AM CDT.

* At 204 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 3.5 inches of rain have 
  fallen tonight. 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 up to 3 inches are possible.

* Some locations that will experience flash flooding include...
  River Falls, Prescott, Afton, Baldwin, Hammond, Roberts, 
  Woodville, Glenwood City, Prairie Farm, Ridgeland, Forest, 
  Emerald, Arland, Cylon, Downing, Connorsville, Reeve, Kinnickinnic 
  State Park and Afton State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4488 9277 4521 9226 4521 9216 4528 9216
      4537 9203 4534 9194 4525 9189 4518 9189
      4506 9207 4470 9272 4475 9281 4484 9277

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 2 HOURS 

$$

Borghoff

2 follow-up statements

929 
WGUS73 KMPX 290807
FFSMPX

Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
307 AM CDT Mon Jun 29 2020

WIC005-033-093-109-291000-
/O.CON.KMPX.FF.W.0003.000000T0000Z-200629T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barron WI-Dunn WI-Pierce WI-St. Croix WI-
307 AM CDT Mon Jun 29 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM CDT EARLY THIS 
MORNING FOR SOUTHWESTERN BARRON, NORTHWESTERN DUNN, NORTHWESTERN 
PIERCE AND CENTRAL ST. CROIX COUNTIES...

At 307 AM CDT, local law enforcement reported thunderstorms 
producing heavy rain across the warned area. Between 3 and 5 inches 
of rain have fallen. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Several roads are flooded and one was washed out near Baldwin. 
Additional rainfall amounts up to 2 inches are possible.

Some locations that will experience flash flooding include...
  River Falls, Prescott, Afton, Baldwin, Hammond, Roberts, 
  Woodville, Glenwood City, Prairie Farm, Ridgeland, Forest, 
  Emerald, Arland, Cylon, Downing, Connorsville, Reeve, Kinnickinnic 
  State Park and Afton State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4488 9277 4521 9226 4521 9216 4528 9216
      4537 9203 4534 9194 4525 9189 4518 9189
      4506 9207 4470 9272 4475 9281 4484 9277

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS 

$$

Borghoff

068 
WGUS53 KMPX 290943
FFWMPX
WIC005-033-093-109-291200-
/O.EXT.KMPX.FF.W.0003.000000T0000Z-200629T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
443 AM CDT Mon Jun 29 2020

The National Weather Service in the Twin Cities has extended the

* Flash Flood Warning for...
  Southwestern Barron County in northwestern Wisconsin...
  Northwestern Dunn County in west central Wisconsin...
  Northwestern Pierce County in west central Wisconsin...
  Central St. Croix County in west central Wisconsin...

* Until 700 AM CDT.

* At 443 AM CDT, Local law enforcement reported some roads flooded 
  in the warned area. Between 4 and 6 inches of rain have fallen. 
  Flash flooding is already occurring and will continue this morning.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement.

  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 2 inches are possible.

* Some locations that will experience flash flooding include...
  River Falls, Prescott, Afton, Baldwin, Hammond, Roberts, 
  Woodville, Glenwood City, Prairie Farm, Ridgeland, Forest, 
  Emerald, Arland, Cylon, Downing, Connorsville, Reeve, Kinnickinnic 
  State Park and Afton State Park.

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 4488 9277 4521 9226 4521 9216 4528 9216
      4537 9203 4534 9194 4525 9189 4518 9189
      4506 9207 4470 9272 4475 9281 4484 9277

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS 

$$

JRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 7:06 PM CDT	Tornado Warning	MPX	Pierce	24 min
Jun 28, 7:30 PM CDT	Special Weather Statement	MPX	Pierce	30 min
Jun 28, 7:49 PM CDT	Special Weather Statement	MPX	Pierce	41 min
Jun 28, 7:51 PM CDT	Tornado Warning	MPX	Pierce	24 min
Jun 28, 8:31 PM CDT	Special Weather Statement	MPX	Pierce	29 min
Jun 28, 8:43 PM CDT	Special Weather Statement	MPX	Pierce	17 min
Jun 28, 8:59 PM CDT	Special Weather Statement	MPX	Dunn	61 min
Jun 28, 9:50 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn	25 min
Jun 28, 10:14 PM CDT	Special Weather Statement	MPX	Rusk	46 min
Jun 29, 1:31 AM CDT	Flash Flood Watch	MPX	Barron, Chippewa, Dunn, Pierce, Polk, Rusk and 1 more	10 hr
Jun 29, 4:33 AM CDT	Special Weather Statement	MPX	Pierce, Saint Croix	57 min
Jun 29, 4:53 AM CDT	Flash Flood Warning	MPX	Dunn, Pierce, Saint Croix	3 hr
Jun 29, 5:08 AM CDT	Special Weather Statement	MPX	Chippewa, Pepin, Rusk	67 min
Jun 29, 6:48 AM CDT	Areal Flood Warning	MPX	Barron, Dunn, Pierce, Polk, Saint Croix	10 hr
Jun 29, 7:40 AM CDT	Areal Flood Warning	MPX	Dunn, Pierce, Saint Croix	5 hr
Jun 29, 12:49 PM CDT	Areal Flood Warning	MPX	Dunn, Pierce, Saint Croix	3 hr
Jun 29, 4:58 PM CDT	Areal Flood Warning	MPX	Pierce, Saint Croix	17 hr

Nearby

Flash Flood Warnings in Wisconsin, 2020 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.