Alert archive / Minnesota / Special Weather Statements in 2020

Special Weather Statement, NWS Twin Cities, MN

June 21, 2020Scott County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jun 21, 2020, 2:42 PM CDT for Scott County, Minnesota. It was in force for 33 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: Jun 21, 2020, 2:42 PM CDT (19:42 UTC)
Expired: Jun 21, 2020, 3:15 PM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN

County Scott County, MN

The radar

The Minneapolis radar (KMPX), 8 km from the middle of the area, began a volume at 19:46 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, 7.7 hours before the alert went out and 9 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: 44 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1247 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Jun 21, 12:44 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jun 21, 12:44 PM CDT, 1 hour 58 minutes before

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Hazardous weather outlook, Jun 21, 3:58 AM CDT, 10 hours 44 minutes before

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In the hours before

Special weather statement, Jun 21, 2:26 PM CDT, 16 minutes before

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Special weather statement, Jun 21, 2:42 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
242 PM CDT Sun Jun 21 2020

MNZ060-068-069-212015-
Hennepin-Carver-Scott-
242 PM CDT Sun Jun 21 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL HENNEPIN...
NORTHEASTERN SCOTT AND SOUTHEASTERN CARVER COUNTIES...

At 242 PM CDT, a strong thunderstorm was located over Carver, or 22
miles southwest of Minneapolis, moving east at 20 mph.

Winds in excess of 30 mph and dime size hail are possible with this
storm.

Locations impacted include...
Eden Prairie, Minnetonka, Shakopee, Savage, Chaska, Chanhassen, Prior
Lake, Carver, Marystown and Flying Cloud Airport.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4471 9363 4481 9368 4492 9347 4474 9337
TIME...MOT...LOC 1942Z 251DEG 19KT 4475 9361

ETA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 10:45 PM CDT	Special Weather Statement	MPX	Lac qui Parle	30 min
Jun 21, 2:26 PM CDT	Special Weather Statement	MPX	Brown	34 min
Jun 21, 2:54 PM CDT	Special Weather Statement	MPX	Nicollet	36 min
Jun 21, 3:02 PM CDT	Special Weather Statement	MPX	Brown	73 min
Jun 21, 3:16 PM CDT	Special Weather Statement	MPX	Sibley	44 min
Jun 21, 3:41 PM CDT	Special Weather Statement	MPX	Scott	49 min
Jun 21, 3:59 PM CDT	Severe Thunderstorm Warning	MPX	Martin, Watonwan	46 min
Jun 21, 4:14 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet	20 min
Jun 21, 4:28 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Watonwan	32 min
Jun 21, 5:12 PM CDT	Severe Thunderstorm Warning	MPX	Faribault	33 min
Jun 21, 5:15 PM CDT	Special Weather Statement	MPX	Martin	45 min
Jun 21, 5:20 PM CDT	Special Weather Statement	MPX	Waseca	40 min
Jun 21, 5:52 PM CDT	Special Weather Statement	MPX	Faribault	38 min
Jun 21, 5:57 PM CDT	Special Weather Statement	MPX	Blue Earth, Watonwan	33 min
Jun 21, 6:07 PM CDT	Special Weather Statement	MPX	Freeborn	38 min
Jun 21, 6:44 PM CDT	Special Weather Statement	MPX	Freeborn	31 min
Jun 21, 3:05 AM CDT	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk	6 hr
Jun 21, 3:47 PM CDT	Special Weather Statement	MPX	Saint Croix	43 min
Jun 21, 4:12 PM CDT	Special Weather Statement	MPX	Barron	33 min
Jun 21, 5:26 PM CDT	Special Weather Statement	MPX	Barron, Dunn, Rusk	49 min
Jun 21, 6:54 PM CDT	Special Weather Statement	MPX	Eau Claire	36 min

Nearby

Special Weather Statements in Minnesota, 2020 Every 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.