Alert archive / North Dakota / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 305

May 20, 20058 counties in Minnesota; 26 counties in North Dakota; 5 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2005, 6:10 PM CDT for 8 counties in Minnesota; 26 counties in North Dakota; 5 counties in South Dakota. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2005, 6:10 PM CDT (23:10 UTC)
Expired: May 21, 2005, 2:00 AM CDT
In force: 8 hr
Issued by: the Storm Prediction Center

All 39 counties

Becker County, MN, Clay County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Red Lake County, MN, Wilkin County, MN, Adams County, ND, Barnes County, ND, Bowman County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Griggs County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Oliver County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Campbell County, SD, Corson County, SD, Harding County, SD, McPherson County, SD, Perkins County, SD

The radar

The Bismarck radar (KBIS), 23 km from the middle of the area, began a volume at 23:13 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.

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 20, 6:23 PM CDT	Severe Thunderstorm Warning	UNR	Harding	67 min
May 20, 6:25 PM CDT	Tornado Warning	FGF	Barnes	50 min
May 20, 6:30 PM CDT	Tornado Warning	FGF	Richland	60 min
May 20, 7:14 PM CDT	Tornado Warning	UNR	Harding	61 min
May 20, 7:23 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	70 min
May 20, 7:28 PM CDT	Tornado Warning	FGF	Wilkin	30 min
May 20, 7:36 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	54 min
May 20, 8:14 PM CDT	Flash Flood Warning	BIS	Stutsman	3 hr
May 20, 8:15 PM CDT	Severe Thunderstorm Warning	UNR	Harding	18 min
May 20, 8:23 PM CDT	Severe Thunderstorm Warning	FGF	Cass	67 min
May 20, 8:28 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	57 min
May 20, 8:30 PM CDT	Flash Flood Warning	FGF	Barnes, Cass	12 hr
May 20, 8:34 PM CDT	Severe Thunderstorm Warning	BIS	Adams	30 min
May 20, 8:42 PM CDT	Tornado Warning	FGF	Cass	55 min
May 20, 9:43 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	40 min
May 21, 1:12 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope	48 min
May 21, 1:24 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	66 min
May 21, 1:40 AM CDT	Severe Thunderstorm Warning	BIS	Stark	68 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 1:39 PM CDT	Mesoscale Discussion	SPC	Clay, Kittson, Marshall, Norman, Pennington, Polk and 2 more	2 hr
May 20, 5:23 PM CDT	Mesoscale Discussion	SPC	Becker, Clay, Clearwater, Mahnomen, Norman, Pennington and 3 more	97 min
May 20, 5:55 PM CDT	Mesoscale Discussion	SPC	Becker, Clay, Clearwater, Mahnomen, Norman, Pennington and 3 more	65 min
May 20, 6:36 PM CDT	Mesoscale Discussion	SPC	Bennett, Haakon, Hughes, Jackson, Jones, Lyman and 4 more	84 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2005 Severe Thunderstorm Watches in Minnesota, 2005 Severe Thunderstorm Watches in South Dakota, 2005 Every severe thunderstorm watch in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.