Alert archive / North Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 100, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 19, 1986, 4:41 PM MDT for Morton County, Oliver County, North Dakota. It was in force for 34 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 19, 1986, 4:41 PM MDT (22:41 UTC)
- Expired
- Aug 19, 1986, 5:15 PM MDT
- In force
- 34 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
Counties Morton County, ND, Oliver County, ND
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 19, 4:45 PM MDT | Hail 1.75 | Morton, ND | |
| Aug 19, 4:45 PM MDT | Hail 1.75 | Oliver, ND | |
| Aug 19, 5:00 PM MDT | Thunderstorm Wind 52 | Morton, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.7 hours before the alert went out and 49 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
- 1955 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 1288 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 188 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 19, 4:08 PM MDT, 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 505 PM CDT TUE AUG 19 1986 ...THUNDERSTORMS DEVELOPING OVER SOUTHWEST AND SOUTH CENTRAL NORTH DAKOTA... AT 500 PM CDT THUNDERSTORMS WERE DEVELOPING IN AN AREA FROM 15 MILES NORTH OF DICKINSON TO 20 MILES NORTHEAST OF BISMARCK. THE HEAVIEST THUNDERSTORMS WERE LOCATED 10 MILES WEST OF BISMARCK IN MORTON COUNTY..30 MILES WEST OF BISMARCK NEAR NEW SALEM..AND 35 MILES NORTHEAST OF DICKINSON IN SOUTHERN MERCER COUNTY. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF VERY HEAVY RAIN AND GUSTY WIND. THE THUNDERSTORMS WERE MOVING EAST AT 20 MPH. THE ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR RAPID DEVELOPMENT OF THUNDERSTORMS ACROSS MUCH OF CENTRAL AND EASTERN NORTH DAKOTA TONIGHT.
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:14 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 61 min |
| Aug 19, 5:33 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh | 57 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1986Every severe thunderstorm warning in 1986
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.