Alert archive / North Dakota / Tornado Watches in 2010
Tornado Watch 538
The Storm Prediction Center issued this tornado watch at Jul 26, 2010, 6:09 PM MDT for Daniels County, Roosevelt County, Sheridan County, Montana; 23 counties in North Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2010, 6:09 PM MDT (00:09 UTC)
- Expired
- Jul 27, 2010, 12:30 AM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 26 counties
Daniels County, MT, Roosevelt County, MT, Sheridan County, MT, Benson County, ND, Bottineau County, ND, Burke County, ND, Cavalier County, ND, Divide County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, McHenry County, ND, McLean County, ND, Mountrail County, ND, Nelson County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Towner County, ND, Walsh County, ND, Ward County, ND, Wells County, ND, Williams County, ND
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
36 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 6:11 PM MDT | Tornado Warning | BIS | Burke, Mountrail, Renville, Ward | 49 min |
| Jul 26, 6:12 PM MDT | Tornado Warning | GGW | Daniels, Sheridan | 33 min |
| Jul 26, 6:21 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 54 min |
| Jul 26, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 34 min |
| Jul 26, 6:27 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 63 min |
| Jul 26, 6:32 PM MDT | Tornado Warning | BIS | McHenry, McLean, Sheridan, Ward | 43 min |
| Jul 26, 6:43 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, McLean, Mercer | 62 min |
| Jul 26, 6:44 PM MDT | Tornado Warning | GGW | Daniels, Roosevelt, Sheridan | 31 min |
| Jul 26, 6:56 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry, Renville, Ward | 49 min |
| Jul 26, 7:16 PM MDT | Tornado Warning | GGW | Roosevelt, Sheridan | 59 min |
| Jul 26, 7:16 PM MDT | Tornado Warning | BIS | McHenry, Pierce, Sheridan, Wells | 44 min |
| Jul 26, 7:17 PM MDT | Severe Thunderstorm Warning | FGF | Cavalier, Towner | 58 min |
| Jul 26, 7:22 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 53 min |
| Jul 26, 7:24 PM MDT | Severe Thunderstorm Warning | BIS | McHenry, Ward | 22 min |
| Jul 26, 7:40 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 50 min |
| Jul 26, 7:43 PM MDT | Severe Thunderstorm Warning | BIS | McHenry | 32 min |
| Jul 26, 7:53 PM MDT | Severe Thunderstorm Warning | BIS | McHenry, McLean, Sheridan | 22 min |
| Jul 26, 7:55 PM MDT | Tornado Warning | FGF | Cavalier, Towner | 65 min |
| Jul 26, 8:04 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 56 min |
| Jul 26, 8:07 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Sheridan | 53 min |
| Jul 26, 8:12 PM MDT | Tornado Warning | GGW | Roosevelt, Sheridan | 19 min |
| Jul 26, 8:13 PM MDT | Tornado Warning | FGF | Ramsey | 62 min |
| Jul 26, 8:32 PM MDT | Flash Flood Warning | BIS | McHenry, Pierce, Sheridan, Wells | 3 hr |
| Jul 26, 8:39 PM MDT | Tornado Warning | BIS | Pierce, Wells | 23 min |
| Jul 26, 8:42 PM MDT | Tornado Warning | BIS | McLean, Sheridan | 33 min |
| Jul 26, 8:47 PM MDT | Severe Thunderstorm Warning | FGF | Cavalier, Grand Forks, Pembina, Ramsey, Walsh | 58 min |
| Jul 26, 8:49 PM MDT | Severe Thunderstorm Warning | BIS | McHenry, McLean, Pierce, Sheridan | 26 min |
| Jul 26, 8:53 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Sheridan, Wells | 51 min |
| Jul 26, 8:56 PM MDT | Tornado Warning | BIS | Burleigh, Kidder, Sheridan, Wells | 15 min |
| Jul 26, 8:58 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 46 min |
| Jul 26, 9:00 PM MDT | Tornado Warning | FGF | Benson, Eddy | 60 min |
| Jul 26, 9:14 PM MDT | Tornado Warning | FGF | Benson | 18 min |
| Jul 26, 9:52 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Sheridan | 12 min |
| Jul 26, 10:15 PM MDT | Severe Thunderstorm Warning | BIS | Foster, Stutsman, Wells | 60 min |
| Jul 26, 10:20 PM MDT | Severe Thunderstorm Warning | FGF | Eddy, Griggs, Nelson | 55 min |
| Jul 27, 12:15 AM MDT | Severe Thunderstorm Warning | BIS | Wells | 60 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 hours before the alert went out and 236 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
- 1740 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 2513 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 8:37 PM MDT | Mesoscale Discussion | SPC | Dawson, Fallon, Wibaux | 53 min |
| Jul 26, 8:00 PM MDT | Mesoscale Discussion | SPC | Cavalier, Grand Forks, Nelson, Pembina, Ramsey, Walsh | 90 min |
| Jul 26, 9:12 PM MDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 8 more | 7 hr |
| Jul 27, 12:05 AM MDT | Mesoscale Discussion | SPC | Barnes, Burleigh, Cass, Foster, Griggs, Kidder and 5 more | 55 min |
| Jul 27, 12:24 AM MDT | Severe Thunderstorm Watch | SPC | Barnes, Burleigh, Cass, Dickey, Eddy, Emmons and 19 more | 8 hr |
| Jul 27, 2:50 AM MDT | Mesoscale Discussion | SPC | Barnes, Burleigh, Cass, Emmons, Foster, Griggs and 8 more | 85 min |
| Jul 27, 6:01 AM MDT | Mesoscale Discussion | SPC | Barnes, Cass, Richland | 89 min |
Nearby
Tornado Watches in North Dakota, 2010Tornado Watches in Montana, 2010Every tornado watch in 2010
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.