Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

July 28, 2021Chisago County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jul 28, 2021, 11:43 AM CDT for Chisago County, Minnesota. It was in force for 32 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 28, 2021, 11:43 AM CDT (16:43 UTC)
Expired: Jul 28, 2021, 12:15 PM CDT
In force: 32 min
Issued by: NWS Twin Cities, MN
Hail: 0.88 in
Wind: 40

County Chisago County, MN

The radar

The Minneapolis radar (KMPX), 79 km from the middle of the area, began a volume at 16:47 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, 4.7 hours before the alert went out and 81 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.

997 
WWUS83 KMPX 281643
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1143 AM CDT Wed Jul 28 2021
 
MNZ053-063-WIZ014-281715-
Washington MN-Chisago MN-Polk WI-
1143 AM CDT Wed Jul 28 2021

...A strong thunderstorm will impact portions of southeastern
Chisago, northeastern Washington and south central Polk Counties
through 1215 PM CDT...

At 1143 AM CDT, Doppler radar was tracking a strong thunderstorm over
Chisago City, or 20 miles southeast of Cambridge, moving southeast at
60 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...
  Osceola around 1155 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4533 9254 4521 9264 4521 9276 4520 9277
      4530 9302 4535 9302 4542 9297
TIME...MOT...LOC 1643Z 294DEG 51KT 4536 9289 

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, 11:59 AM CDT	Severe Thunderstorm Warning	MPX	Chisago, Washington	31 min
Jul 28, 12:28 PM CDT	Special Weather Statement	MPX	Saint Croix	32 min
Jul 28, 12:54 PM CDT	Special Weather Statement	MPX	Pierce	36 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.