Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

April 27, 2021Watonwan County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Apr 27, 2021, 1:31 AM CDT for Watonwan County, Minnesota. It was in force for 44 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
Apr 27, 2021, 1:31 AM CDT (06:31 UTC)
Expired
Apr 27, 2021, 2:15 AM CDT
In force
44 min
Issued by
NWS Twin Cities, MN

County Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 137 km from the middle of the area, began a volume at 06:34 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, 6.5 hours before the alert went out and 136 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, Minneapolis, MN at 00:00Z on 2021-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 2021-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 397 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
397 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

256 
WWUS83 KMPX 270631
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
131 AM CDT Tue Apr 27 2021

MNZ082-091-270715-
Watonwan-Martin-
131 AM CDT Tue Apr 27 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL MARTIN AND
SOUTHEASTERN WATONWAN COUNTIES...

At 131 AM CDT, a strong thunderstorm was located near Trimont, or 14
miles northwest of Fairmont, moving northeast at 25 mph.

Nickel size hail is possible with this storm.

Locations impacted include...
Truman, Lewisville, South Branch and Ormsby. 

LAT...LON 4383 9476 4397 9437 4385 9436 4380 9436
      4374 9467
TIME...MOT...LOC 0631Z 242DEG 22KT 4381 9464 

$$

MPG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:05 AM CDTSpecial Weather StatementMPXMartin40 min
Apr 27, 7:11 AM CDTSevere Thunderstorm WarningMPXMartin, Watonwan49 min
Apr 27, 7:51 AM CDTSpecial Weather StatementMPXBlue Earth39 min

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.