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Storm Events Database
Event Details
| Event | Tornado |
| -- Scale | EF0 |
| -- Length | 1 Miles |
| -- Width | 40 Yards |
| State | NORTH DAKOTA |
| County/Area | WILLIAMS |
| WFO | BIS |
| Begin Date | 08/10/2007 22:04:00 CST-6 |
| Begin Range | 8 |
| Begin Azimuth | SSE |
| Begin Location | ALAMO |
| Begin Lat/Lon | 48.48/-103.41 |
| End Date | 08/10/2007 22:15:00 CST-6 |
| End Range | 9 |
| End Azimuth | SSE |
| End Location | ALAMO |
| End Lat/Lon | 48.47/-103.4 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 0.00K |
| Crop Damage | 0.00K |
| Episode Narrative | A complex and lengthy severe weather event occurred over west and central North Dakota starting in the morning of Friday, August 10th, and lasting into the early morning hours of Saturday, August 11th. Scattered severe thunderstorms continuously redeveloped over the area along a surface trough that was oriented from southwest to northeast, from around Dickinson, to near Grand Forks. Convection was also supported by a favorable overrunning situation when the southerly low level jet intensified and persisted. Numerous warnings were issued, and numerous severe weather reports were received. Severe Thunderstorm Watch 582 was issued due to ongoing convection and in anticipation of future development/intensification across south central North Dakota. Late in the afternoon on Friday, Severe Thunderstorm Watch 584 was issued for all of western and much of central North Dakota. Storms were expected to reintensify during the evening and spread east as large scale upper level support and a cold front approached. |
| Event Narrative | This tornado was sighted by a weather modification pilot. The tornado hit no structures. |
All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 0 | 0 | 167.00K | 100.00K | |||||||
| ROLETTE | ROLETTE CO. | ND | 08/10/2007 | 07:46 | CST-6 | Hail | 0.88 in. | 0 | 0 | 0.00K | 0.00K |
| GOODRICH | SHERIDAN CO. | ND | 08/10/2007 | 09:42 | CST-6 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| RIVERDALE | MCLEAN CO. | ND | 08/10/2007 | 10:04 | CST-6 | Hail | 1.25 in. | 0 | 0 | 0.00K | 0.00K |
| BUTTE | MCLEAN CO. | ND | 08/10/2007 | 10:04 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 50.00K |
| HARVEY | WELLS CO. | ND | 08/10/2007 | 10:24 | CST-6 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| RIVERDALE | MCLEAN CO. | ND | 08/10/2007 | 10:30 | CST-6 | Hail | 1.75 in. | 0 | 0 | 0.00K | 0.00K |
| BALFOUR | MCHENRY CO. | ND | 08/10/2007 | 11:00 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| RIVERDALE | MCLEAN CO. | ND | 08/10/2007 | 11:17 | CST-6 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| BUTTE | MCLEAN CO. | ND | 08/10/2007 | 11:24 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| RUGBY | PIERCE CO. | ND | 08/10/2007 | 11:30 | CST-6 | Hail | 0.88 in. | 0 | 0 | 0.00K | 0.00K |
| DRAKE | MCHENRY CO. | ND | 08/10/2007 | 11:45 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 0.00K |
| NAPOLEON | LOGAN CO. | ND | 08/10/2007 | 15:45 | CST-6 | Hail | 2.50 in. | 0 | 0 | 60.00K | 0.00K |
| FT YATES | SIOUX CO. | ND | 08/10/2007 | 16:30 | MST-7 | Hail | 0.88 in. | 0 | 0 | 0.00K | 0.00K |
| FT YATES | SIOUX CO. | ND | 08/10/2007 | 16:51 | MST-7 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| SELFRIDGE | SIOUX CO. | ND | 08/10/2007 | 17:03 | MST-7 | Hail | 1.75 in. | 0 | 0 | 0.00K | 0.00K |
| LINTON | EMMONS CO. | ND | 08/10/2007 | 17:53 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| RAY | WILLIAMS CO. | ND | 08/10/2007 | 21:10 | CST-6 | Hail | 1.75 in. | 0 | 0 | 0.00K | 0.00K |
| CROSBY | DIVIDE CO. | ND | 08/10/2007 | 21:45 | CST-6 | Thunderstorm Wind | 78 kts. EG | 0 | 0 | 65.00K | 0.00K |
| ALAMO | WILLIAMS CO. | ND | 08/10/2007 | 22:04 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| MC GREGOR | WILLIAMS CO. | ND | 08/10/2007 | 22:30 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 2.00K | 0.00K |
| NOONAN | DIVIDE CO. | ND | 08/10/2007 | 22:30 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| TIOGA | WILLIAMS CO. | ND | 08/10/2007 | 22:40 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| HEBRON | MORTON CO. | ND | 08/10/2007 | 23:58 | CST-6 | Hail | 2.75 in. | 0 | 0 | 40.00K | 40.00K |
| NEW SALEM | MORTON CO. | ND | 08/11/2007 | 00:48 | CST-6 | Thunderstorm Wind | 64 kts. MG | 0 | 0 | 0.00K | 0.00K |
| HEBRON | MORTON CO. | ND | 08/11/2007 | 01:00 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 10.00K |
| BISMARCK | BURLEIGH CO. | ND | 08/11/2007 | 01:01 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 0.00K |
| (BIS)BISMARCK MUNI A | BURLEIGH CO. | ND | 08/11/2007 | 01:35 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 0.00K |
| BISMARCK | BURLEIGH CO. | ND | 08/11/2007 | 01:54 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| STEELE | KIDDER CO. | ND | 08/11/2007 | 02:38 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 0.00K |
| Totals: | 0 | 0 | 167.00K | 100.00K |
