Alert archive / North Dakota / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 581
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2001, 7:45 PM MDT for 12 counties in North Dakota; 6 counties in South Dakota; Crook County, Wyoming. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2001, 7:45 PM MDT (01:45 UTC)
- Expired
- Jul 19, 2001, 1:00 AM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Adams County, ND, Billings County, ND, Bowman County, ND, Burleigh County, ND, Grant County, ND, Hettinger County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Corson County, SD, Harding County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD, Crook County, WY
The radar
The Rapid City radar (KUDX), 165 km from the middle of the area, began a volume at 01:46 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.
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:27 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 63 min |
| Jul 18, 8:28 PM MDT | Severe Thunderstorm Warning | BIS | Bowman | 62 min |
| Jul 18, 9:25 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 50 min |
| Jul 18, 9:30 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Bowman | 60 min |
| Jul 18, 9:34 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 56 min |
| Jul 18, 10:25 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 65 min |
| Jul 18, 10:31 PM MDT | Severe Thunderstorm Warning | BIS | Adams | 44 min |
| Jul 18, 10:54 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 51 min |
| Jul 18, 11:16 PM MDT | Severe Thunderstorm Warning | BIS | Sioux | 59 min |
| Jul 18, 11:43 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 62 min |
| Jul 19, 12:43 AM MDT | Severe Thunderstorm Warning | ABR | Corson | 17 min |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 1.8 hours before the alert went out and 172 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.
- Mixed-layer CAPE
- 1170 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 2287 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:45 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Burleigh, Grant, Hettinger and 6 more | 5 hr |
| Jul 18, 9:00 PM MDT | Severe Thunderstorm Watch | SPC | Barnes, Cass, Dickey, Emmons, Kidder, LaMoure and 5 more | 5 hr |
| Jul 19, 2:00 AM MDT | Severe Thunderstorm Watch | SPC | Barnes, Cass, Dickey, LaMoure, Logan, McIntosh and 3 more | 5 hr |
| Jul 19, 1:30 PM MDT | Tornado Watch | SPC | Billings, Burke, Divide, Golden Valley, McKenzie, Mountrail and 1 more | 5 hr |
| Jul 19, 5:00 PM MDT | Tornado Watch | SPC | Adams, Benson, Billings, Bottineau, Bowman, Burke and 26 more | 6 hr |
| Jul 19, 4:30 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Butte, Campbell, Corson, Custer, Dewey and 15 more | 7 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2001Severe Thunderstorm Watches in South Dakota, 2001Severe Thunderstorm Watches in Wyoming, 2001Every severe thunderstorm watch in 2001
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.