Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

July 28, 2021Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Jul 28, 2021, 12:28 PM CDT for Saint Croix County, Wisconsin. It was in force for 32 min. 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: Jul 28, 2021, 12:28 PM CDT (17:28 UTC)
Expired: Jul 28, 2021, 1:00 PM CDT
In force: 32 min
Issued by: NWS Twin Cities, MN
Hail: 0.88 in
Wind: 40

County Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 17:30 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
Jul 28, 12:30 PM CDT	HAIL 0.75	1 Se New Richmond, WI
Jul 28, 12:37 PM CDT	HAIL 0.5	1 Sse New Richmond, WI

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 12:00Z, 5.5 hours before the alert went out and 91 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: 1458 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1435 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

813 
WWUS83 KMPX 281728
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1228 PM CDT Wed Jul 28 2021
 
WIZ023-281800-
St. Croix WI-
1228 PM CDT Wed Jul 28 2021

...A strong thunderstorm will impact portions of central St. Croix
County through 100 PM CDT...

At 1228 PM CDT, Doppler radar was tracking a strong thunderstorm over
New Richmond, or 16 miles north of River Falls, moving southeast at
40 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

This strong thunderstorm will be near...
  Hammond around 1240 PM CDT.
  Baldwin around 1245 PM CDT.

Other locations in the path of this storm include Woodville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4512 9266 4518 9253 4500 9214 4488 9244
TIME...MOT...LOC 1728Z 305DEG 34KT 4509 9254 

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

$$

Dye

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 4:13 AM CDT	Special Weather Statement	MPX	Pope, Stevens	32 min
Jul 28, 4:19 AM CDT	Special Weather Statement	MPX	Todd	26 min
Jul 28, 4:45 AM CDT	Special Weather Statement	MPX	Stearns	30 min
Jul 28, 4:46 AM CDT	Special Weather Statement	MPX	Chippewa, Pope, Stevens, Swift	44 min
Jul 28, 4:53 AM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens	28 min
Jul 28, 4:54 AM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	36 min
Jul 28, 5:29 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	46 min
Jul 28, 6:17 AM CDT	Special Weather Statement	MPX	Meeker	28 min
Jul 28, 6:45 AM CDT	Special Weather Statement	MPX	Carver, Wright	30 min
Jul 28, 7:19 AM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet	41 min
Jul 28, 11:43 AM CDT	Special Weather Statement	MPX	Chisago	32 min
Jul 28, 11:59 AM CDT	Severe Thunderstorm Warning	MPX	Chisago, Washington	31 min
Jul 28, 12:54 PM CDT	Special Weather Statement	MPX	Pierce	36 min

Nearby

Special Weather Statements in Wisconsin, 2021 Every special weather statement in 2021

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.