Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

July 25, 2021Stevens County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jul 25, 2021, 11:20 PM CDT for Stevens County, Minnesota. It was in force for 55 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 25, 2021, 11:20 PM CDT (04:20 UTC)
Expired
Jul 26, 2021, 12:15 AM CDT
In force
55 min
Issued by
NWS Twin Cities, MN
Hail
0.88 in
Wind
50

County Stevens County, MN

The radar

The Aberdeen radar (KABR), 174 km from the middle of the area, began a volume at 04:22 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

Aberdeen, SD (KABR), launched 00:00Z, 4.3 hours before the alert went out and 190 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2021-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1771 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2021-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1771 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
2015 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.0
Supercell composite
31.3

Open this sounding in Storm Lab

The text

As transmitted.

348 
WWUS83 KMPX 260420
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1120 PM CDT Sun Jul 25 2021
 
MNZ047-260515-
Stevens MN-
1120 PM CDT Sun Jul 25 2021

...A strong thunderstorm will impact portions of western Stevens
County through 1215 AM CDT...

At 1119 PM CDT, Doppler radar was tracking a strong thunderstorm  13 
miles southeast of Wheaton, moving southeast at 10 mph.

HAZARD...Wind gusts up to 50 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.

Locations impacted include...
  Chokio and Lake Hattie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4575 9625 4576 9623 4542 9591 4541 9622
      4542 9625 4573 9626
TIME...MOT...LOC 0419Z 326DEG 11KT 4566 9632 

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

$$

MPG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 10:37 PM CDTSpecial Weather StatementMPXStevens38 min
Jul 26, 3:14 AM CDTExcessive Heat WatchMPXAnoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 27 more36 hr

Nearby

Special Weather Statements in Minnesota, 2021Every 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.