Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

August 5, 2021Anoka County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 5, 2021, 7:57 PM CDT for Anoka County, Minnesota. It was in force for 33 min. 1 report 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: Aug 5, 2021, 7:57 PM CDT (00:57 UTC)
Expired: Aug 5, 2021, 8:30 PM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN
Hail: 0.50 in
Wind: 40

County Anoka County, MN

The radar

The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 00:56 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
Aug 5, 8:12 PM CDT	HAIL 0.5	1 Ne Centerville, MN	REPORT FROM MPING: HALF-INCH (0.50 IN.).

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, 1.0 hours before the alert went out and 57 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: 2006 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

855 
WWUS83 KMPX 060057
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
757 PM CDT Thu Aug 5 2021
 
MNZ053-061-063-060130-
Anoka MN-Washington MN-Chisago MN-
757 PM CDT Thu Aug 5 2021

...A strong thunderstorm will impact portions of south central
Chisago, east central Anoka and northwestern Washington Counties
through 830 PM CDT...

At 757 PM CDT, Doppler radar was tracking a strong thunderstorm over
Lino Lakes, or 15 miles northeast of Minneapolis, moving east at 25
mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
  Lino Lakes around 800 PM CDT.
  Hugo around 810 PM CDT.

Other locations in the path of this storm include Stillwater.

This includes the following highways...
 Interstate 35 between mile markers 130 and 133.
 U.S. Highway 8 in Minnesota between mile markers 0 and 5.
 U.S. Highway 61 near mile marker 163.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4507 9283 4509 9299 4512 9299 4512 9316
      4513 9322 4522 9323 4537 9284
TIME...MOT...LOC 0057Z 272DEG 21KT 4517 9314 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 8:32 PM CDT	Special Weather Statement	MPX	Washington	43 min
Aug 5, 8:38 PM CDT	Special Weather Statement	MPX	Dakota	37 min
Aug 5, 8:47 PM CDT	Special Weather Statement	MPX	Sibley	28 min
Aug 5, 9:02 PM CDT	Special Weather Statement	MPX	Chisago	43 min
Aug 5, 9:38 PM CDT	Special Weather Statement	MPX	Washington	52 min
Aug 5, 10:42 PM CDT	Special Weather Statement	MPX	Washington	33 min
Aug 5, 8:20 PM CDT	Special Weather Statement	MPX	Polk	40 min
Aug 5, 11:40 PM CDT	Special Weather Statement	MPX	Pierce	65 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.