Alert archive / Minnesota / Special Weather Statements in 2017

Special Weather Statement, NWS Twin Cities, MN

July 21, 2017Freeborn County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jul 21, 2017, 7:18 AM CDT for Freeborn County, Minnesota. It was in force for 27 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 21, 2017, 7:18 AM CDT (12:18 UTC)
Expired: Jul 21, 2017, 7:45 AM CDT
In force: 27 min
Issued by: NWS Twin Cities, MN

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 125 km from the middle of the area, began a volume at 12:19 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, 0.3 hours before the alert went out and 125 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2450 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 156 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 Jul 21, 3:43 AM CDT, 3 hours 35 minutes earlier.

Area forecast discussion, Jul 21, 3:43 AM CDT, 3 hours 35 minutes before

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Hazardous weather outlook, Jul 21, 4:00 AM CDT, 3 hours 18 minutes before

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In the hours before

Special weather statement, Jul 21, 3:46 AM CDT, 3 hours 32 minutes before

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Special weather statement, Jul 21, 5:38 AM CDT, 1 hour 40 minutes before

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Local storm report, Jul 21, 7:06 AM CDT, 12 minutes before

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Local storm report, Jul 21, 7:07 AM CDT, 11 minutes before

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Special weather statement, Jul 21, 7:18 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 5:38 AM CDT	Special Weather Statement	MPX	Faribault, Watonwan	52 min

Nearby

Special Weather Statements in Minnesota, 2017 Every special weather statement in 2017

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.