Alert archive / Minnesota / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 21, NWS Grand Forks, ND

May 30, 2023Clearwater County, Mahnomen County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 30, 2023, 5:47 PM CDT for Clearwater County, Mahnomen County, Minnesota. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 30, 2023, 5:47 PM CDT (22:47 UTC)
Expired: May 30, 2023, 6:30 PM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Clearwater County, MN, Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 136 km from the middle of the area, began a volume at 22:46 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.

What was reported inside it

Time	Report	Where	Remark
May 30, 6:04 PM CDT	HAIL 1	6 N Zerkel, MN	REPORT RELAYED VIA FACEBOOK.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.8 hours before the alert went out and 220 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: 1401 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

904 
WUUS53 KFGF 302247
SVRFGF
MNC029-087-302330-
/O.NEW.KFGF.SV.W.0021.230530T2247Z-230530T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
547 PM CDT Tue May 30 2023

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Eastern Mahnomen County in northwestern Minnesota...
  Southern Clearwater County in northwestern Minnesota...

* Until 630 PM CDT.

* At 546 PM CDT, severe thunderstorms were located along a line
  extending from near Ebro to near Naytahwaush, moving east at 20
  mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Bagley, Island Lake in Mahnomen County, Naytahwaush, Rice Lake, Roy
  Lake, northern Long Lost Lake and Pine Bend.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4715 9562 4715 9568 4735 9577 4747 9566
      4756 9531 4723 9522
TIME...MOT...LOC 2246Z 257DEG 19KT 4747 9556 4722 9571 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Perroux

2 follow-up statements

799 
WWUS53 KFGF 302251
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
551 PM CDT Tue May 30 2023

MNC029-087-302330-
/O.CON.KFGF.SV.W.0021.000000T0000Z-230530T2330Z/
Mahnomen MN-Clearwater MN-
551 PM CDT Tue May 30 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR EASTERN MAHNOMEN AND SOUTHERN CLEARWATER COUNTIES...

At 550 PM CDT, severe thunderstorms were located along a line
extending from near Ebro to near Naytahwaush, moving east at 20 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Bagley, Island Lake in Mahnomen County, Naytahwaush, Rice Lake, Roy
Lake, northern Long Lost Lake and Pine Bend.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4715 9562 4715 9568 4735 9577 4747 9566
      4756 9531 4723 9522
TIME...MOT...LOC 2250Z 270DEG 19KT 4747 9556 4722 9571 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Perroux

786 
WWUS53 KFGF 302329
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
629 PM CDT Tue May 30 2023

MNC029-087-302336-
/O.EXP.KFGF.SV.W.0021.000000T0000Z-230530T2330Z/
Mahnomen MN-Clearwater MN-
629 PM CDT Tue May 30 2023

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MAHNOMEN AND SOUTHERN
CLEARWATER COUNTIES WILL EXPIRE AT 630 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. New warning was 
issued for Eastern Clearwater, southern Beltrami, and Northern 
Hubbard counties.

LAT...LON 4715 9562 4715 9568 4735 9577 4747 9566
      4756 9531 4723 9522
TIME...MOT...LOC 2326Z 257DEG 19KT 4751 9531 4726 9546 

$$

Spender

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 3:07 PM CDT	Special Weather Statement	FGF	Norman	23 min
May 30, 3:17 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	43 min
May 30, 3:34 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	41 min
May 30, 3:55 PM CDT	Severe Thunderstorm Warning	FGF	Mahnomen, Norman, Polk	50 min
May 30, 4:12 PM CDT	Special Weather Statement	FGF	Grant	48 min
May 30, 4:21 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	25 min
May 30, 4:23 PM CDT	Severe Thunderstorm Warning	FGF	Grant	32 min
May 30, 4:25 PM CDT	Special Weather Statement	FGF	Norman	35 min
May 30, 4:37 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater, Mahnomen, Polk	38 min
May 30, 4:40 PM CDT	Special Weather Statement	FGF	Red Lake	35 min
May 30, 4:48 PM CDT	Special Weather Statement	FGF	Beltrami	27 min
May 30, 4:50 PM CDT	Special Weather Statement	FGF	Otter Tail	40 min
May 30, 5:09 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater	51 min
May 30, 5:15 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	45 min
May 30, 5:23 PM CDT	Special Weather Statement	FGF	Mahnomen	37 min
May 30, 5:29 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Mahnomen	46 min
May 30, 5:39 PM CDT	Special Weather Statement	FGF	Mahnomen	36 min
May 30, 5:45 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	20 min
May 30, 5:56 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater	49 min
May 30, 6:04 PM CDT	Special Weather Statement	FGF	Lake of the Woods	41 min
May 30, 6:20 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard	40 min
May 30, 6:36 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	39 min
May 30, 6:43 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard	47 min
May 30, 6:47 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clearwater, Hubbard, Mahnomen	43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.