Alert archive / Minnesota / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 27, NWS Grand Forks, ND

May 31, 2023Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 31, 2023, 5:15 PM CDT for Clay 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 counties it named.

The facts

Issued: May 31, 2023, 5:15 PM CDT (22:15 UTC)
Expired: May 31, 2023, 5:53 PM CDT
In force: 38 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Clay County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 95 km from the middle of the area, began a volume at 22:17 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 12:00Z, 10.3 hours before the alert went out and 266 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2044 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 2:20 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, May 31, 2:20 PM CDT, 2 hours 55 minutes before

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Hazardous weather outlook, May 31, 5:04 AM CDT, 12 hours 11 minutes before

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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:05 PM CDT	Special Weather Statement	FGF	Lake of the Woods	25 min
May 30, 7:32 PM CDT	Special Weather Statement	FGF	Lake of the Woods	43 min
May 31, 6:34 PM CDT	Special Weather Statement	FGF	Wadena	26 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2023 Every severe thunderstorm warning in 2023

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.