Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

August 28, 20214 counties in Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 28, 2021, 7:41 PM CDT for 4 counties in Minnesota. It was in force for 34 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: Aug 28, 2021, 7:41 PM CDT (00:41 UTC)
Expired: Aug 28, 2021, 8:15 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Hail: 0.00 in
Wind: 50

Counties Blue Earth County, MN, Le Sueur County, MN, Rice County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 52 km from the middle of the area, began a volume at 00:44 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, 0.7 hours before the alert went out and 51 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: 1990 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 977 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

As transmitted.

752 
WWUS83 KMPX 290041
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
741 PM CDT Sat Aug 28 2021
 
MNZ067>069-075>077-083-084-290115-
Le Sueur MN-Waseca MN-Blue Earth MN-Rice MN-Carver MN-Sibley MN-
Scott MN-Nicollet MN-
741 PM CDT Sat Aug 28 2021

...Strong thunderstorms will impact portions of Le Sueur, eastern
Sibley, Scott, northeastern Blue Earth, western Rice, northern
Waseca, southeastern Carver and eastern Nicollet Counties through 815
PM CDT...

At 740 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Henderson to 5 miles west of Montgomery to
near Madison Lake to near Mankato. Movement was northeast at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Strong thunderstorms will be near...
  Montgomery around 745 PM CDT.
  New Prague and Belle Plaine around 750 PM CDT.
  Lonsdale around 755 PM CDT.
  Jordan around 800 PM CDT.

Other locations in the path of these storms include Waterville,
Webster, Elko New Market, Faribault, Carver, Shakopee, Prior Lake,
Morristown and Warsaw.

This includes the following highways...
 Interstate 35 between mile markers 62 and 79.
 U.S. Highway 14 between mile markers 126 and 153.
 U.S. Highway 169 between mile markers 50 and 84.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
south central, central and east central Minnesota.

&&

LAT...LON 4401 9408 4456 9411 4473 9386 4477 9354
      4460 9328 4437 9328 4412 9345
TIME...MOT...LOC 0040Z 243DEG 39KT 4456 9393 4445 9368 4421 9375 4411
9395

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

$$

NDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:13 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet, Rice, Sibley	32 min
Aug 28, 7:40 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	23 min
Aug 28, 8:07 PM CDT	Special Weather Statement	MPX	Rice	23 min
Aug 28, 8:17 PM CDT	Special Weather Statement	MPX	Redwood	28 min
Aug 28, 8:26 PM CDT	Special Weather Statement	MPX	Dakota, Goodhue	34 min
Aug 28, 8:57 PM CDT	Special Weather Statement	MPX	Goodhue	33 min
Aug 28, 8:59 PM CDT	Special Weather Statement	MPX	Redwood	31 min
Aug 28, 9:02 PM CDT	Flash Flood Warning	MPX	Redwood	6 hr
Aug 28, 9:29 PM CDT	Special Weather Statement	MPX	Brown	31 min
Aug 28, 10:02 PM CDT	Special Weather Statement	MPX	Brown	43 min
Aug 28, 10:15 PM CDT	Tornado Warning	MPX	Brown	30 min
Aug 28, 10:52 PM CDT	Special Weather Statement	MPX	Nicollet	53 min
Aug 28, 11:28 PM CDT	Special Weather Statement	MPX	Le Sueur	47 min
Aug 29, 12:12 AM CDT	Special Weather Statement	MPX	Hennepin, Ramsey	93 min

Nearby

Special Weather Statements in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.