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, 10:37 PM CDT for Stevens County, Minnesota. It was in force for 38 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, 10:37 PM CDT (03:37 UTC)
Expired
Jul 25, 2021, 11:15 PM CDT
In force
38 min
Issued by
NWS Twin Cities, MN

County Stevens County, MN

The radar

The Aberdeen radar (KABR), 183 km from the middle of the area, began a volume at 03:40 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, 3.6 hours before the alert went out and 203 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.

036 
WWUS83 KMPX 260337
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1037 PM CDT Sun Jul 25 2021

MNZ047-260415-
Stevens-
1037 PM CDT Sun Jul 25 2021

...A STRONG THUNDERSTORM WILL AFFECT FAR NORTHERN STEVENS COUNTY...

At 1037 PM CDT, a strong thunderstorm was located over Herman, or 16
miles east of Wheaton, moving east at 30 mph.

Winds in excess of 40 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Donnelly.

LAT...LON 4576 9625 4576 9577 4567 9576 4571 9626
      4573 9626
TIME...MOT...LOC 0337Z 262DEG 28KT 4580 9616 

$$

JRB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 11:20 PM CDTSpecial Weather StatementMPXStevens55 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.