Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

August 5, 2021Washington County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 5, 2021, 8:32 PM CDT for Washington County, Minnesota. It was in force for 43 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 5, 2021, 8:32 PM CDT (01:32 UTC)
Expired: Aug 5, 2021, 9:15 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Hail: 0.75 in
Wind: 40

County Washington County, MN

The radar

The Minneapolis radar (KMPX), 67 km from the middle of the area, began a volume at 01:33 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, 1.5 hours before the alert went out and 70 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.

927 
WWUS83 KMPX 060132
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
832 PM CDT Thu Aug 5 2021
 
MNZ063-WIZ014-023-060215-
Washington MN-Polk WI-St. Croix WI-
832 PM CDT Thu Aug 5 2021

...A strong thunderstorm will impact portions of northern Washington,
northwestern St. Croix and south central Polk Counties through 915 PM
CDT...

At 832 PM CDT, Doppler radar was tracking a strong thunderstorm over
Hugo, or 18 miles northeast of St. Paul, moving east at 15 mph.

HAZARD...Winds in excess of 40 mph and penny 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.

Locations impacted include...
  Somerset.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4513 9298 4518 9298 4531 9262 4506 9259
TIME...MOT...LOC 0132Z 271DEG 14KT 4517 9291 

MAX HAIL SIZE...0.75 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, 7:57 PM CDT	Special Weather Statement	MPX	Anoka	33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.