Alert archive / Minnesota / Special Weather Statements in 2020

Special Weather Statement, NWS Twin Cities, MN

August 7, 2020Chippewa County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 7, 2020, 7:45 AM CDT for Chippewa County, Minnesota. It was in force for 45 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 7, 2020, 7:45 AM CDT (12:45 UTC)
Expired
Aug 7, 2020, 8:30 AM CDT
In force
45 min
Issued by
NWS Twin Cities, MN

County Chippewa County, MN

The radar

The Minneapolis radar (KMPX), 161 km from the middle of the area, began a volume at 12:45 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 12:00Z, 0.8 hours before the alert went out and 158 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 12:00Z on 2020-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 98 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, Minneapolis, MN at 12:00Z on 2020-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.193958Sfc1 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
98 J/kg
Mixed-layer CIN
-272 J/kg
Mixed-layer LCL
780 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

167 
WWUS83 KMPX 071245
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
745 AM CDT Fri Aug 7 2020

MNZ054-056-064-071330-
Chippewa-Yellow Medicine-Lac Qui Parle-
745 AM CDT Fri Aug 7 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN LAC QUI PARLE...
CENTRAL CHIPPEWA AND NORTHEASTERN YELLOW MEDICINE COUNTIES...

At 745 AM CDT, a strong thunderstorm was located near Clarkfield, or
near Montevideo, moving east at 30 mph.

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

Locations impacted include...
Montevideo, Granite Falls, Clarkfield, Maynard, Boyd, Asbury,
Montevideo Airport and Gluek.

This includes the following highways...
 U.S. Highway 212 between mile markers 24 and 52.
 U.S. Highway 59 between mile markers 96 and 107.

LAT...LON 4511 9545 4489 9542 4489 9548 4477 9549
      4476 9595 4495 9597
TIME...MOT...LOC 1245Z 254DEG 28KT 4486 9578 

$$

JRB

Nearby

Special Weather Statements in Minnesota, 2020Every special weather statement in 2020

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.