Alert archive / Wisconsin / Flash Flood Warnings in 2018
Flash Flood Warning 8, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 24, 2018, 5:58 PM CDT for Pierce County, Saint Croix County, Wisconsin. It was in force for 3 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
- Aug 24, 2018, 5:58 PM CDT (22:58 UTC)
- Expired
- Aug 24, 2018, 9:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Pierce County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 89 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 92 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
- 107 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
040
WGUS53 KMPX 242258
FFWMPX
WIC093-109-250200-
/O.NEW.KMPX.FF.W.0008.180824T2258Z-180825T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
558 PM CDT FRI AUG 24 2018
The National Weather Service in The Twin Cities has issued a
* Flash Flood Warning for...
Northwestern Pierce County in west central Wisconsin...
Southeastern St. Croix County in west central Wisconsin...
* Until 900 PM CDT.
* At 556 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. 2 TO 4 inches of rain have
fallen across much of the area since this afternoon, with
localized amounts of more than 5 inches reported by spotters.
Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
River Falls, Hammond, Baldwin, Woodville, Beldenville, Hersey and
Martel.
Additional rainfall amounts of an inch or two are possible in the
warned area.
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 4498 9219 4481 9240 4466 9265 4481 9272
4489 9265 4492 9257 4504 9234 4505 9221
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 5:22 PM CDT | Special Weather Statement | MPX | Saint Croix | 83 min |
| Aug 24, 5:37 PM CDT | Special Weather Statement | MPX | Pierce | 83 min |
| Aug 24, 6:18 PM CDT | Special Weather Statement | MPX | Pierce | 87 min |
| Aug 24, 6:49 PM CDT | Special Weather Statement | MPX | Dunn | 116 min |
Nearby
Flash Flood Warnings in Wisconsin, 2018Every flash flood warning in 2018
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.