Alert archive / North Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 18, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 19, 1987, 7:17 PM MDT for Adams County, North Dakota. It was in force for 58 min. 1 report 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
- Jul 19, 1987, 7:17 PM MDT (01:17 UTC)
- Expired
- Jul 19, 1987, 8:15 PM MDT
- In force
- 58 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Adams 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 |
|---|---|---|---|
| Jul 19, 7:20 PM MDT | Hail 0.75 | Adams, 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 00:00Z, 1.3 hours before the alert went out and 159 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
- 90 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1852 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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, Jul 19, 6:25 PM MDT, 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 615 PM MDT SUN JUL 19 1987 ...STRONG THUNDERSTORMS DEVELOPING OVER SOUTHWEST NORTH DAKOTA... AT 610 PM MDT RADAR INDICATED A SMALL GROUP OF INTENSIFYING THUNDERSTORMS OVER THE SOUTHWESTERN CORNER OF NORTH DAKOTA. THE STRONGEST THUNDERSTORM WAS LOCATED OVER THE SOUTHWEST CORNER OF THE STATE...25 MILES SOUTHWEST OF BOWMAN...OR 65 MILES SOUTHWEST OF DICKINSON. THE THUNDERSTORM WAS MOVING NORTHEAST AT 20 MPH AND WILL LIKELY PASS NEAR THE TOWNS BOWMAN AND SCRANTON BEFORE 7 PM MDT. VERY HEAVY RAIN...SMALL HAIL...GUSTY WINDS UP TO 50 MPH...AND DANGEROUS LIGHTNING CAN BE EXPECTED WITH THE PASSAGE OF THIS THUNDERSTORM. ANOTHER THUNDERSTORM...WITH HEAVY RAIN...WAS LOCATED 25 MILES SOUTH OF DICKINSON AND WILL PASS NEAR THE TOWNS OF REGENT AND MOTT. IF THREATENING WEATHER APPROACHES TAKE COVER IMMEDIATELY. LEBLANG
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:22 PM MDT | Tornado Warning | BIS | Adams, Sioux | 38 min |
| Jul 19, 8:58 PM MDT | Tornado Warning | BIS | Sioux | 32 min |
| Jul 19, 9:02 PM MDT | Severe Thunderstorm Warning | BIS | Grant | 58 min |
| Jul 19, 9:34 PM MDT | Tornado Warning | BIS | Adams | 26 min |
| Jul 19, 9:46 PM MDT | Severe Thunderstorm Warning | BIS | Sioux | 59 min |
| Jul 19, 10:48 PM MDT | Severe Thunderstorm Warning | BIS | Emmons | 72 min |
| Jul 19, 10:52 PM MDT | Severe Thunderstorm Warning | BIS | Sioux | 68 min |
| Jul 19, 11:58 PM MDT | Severe Thunderstorm Warning | BIS | Emmons, Logan, McIntosh | 62 min |
| Jul 20, 12:25 AM MDT | Severe Thunderstorm Warning | BIS | Bowman | 65 min |
| Jul 20, 1:31 AM MDT | Tornado Warning | BIS | Hettinger | 29 min |
| Jul 20, 1:46 AM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 29 min |
| Jul 20, 2:15 AM MDT | Severe Thunderstorm Warning | BIS | Grant, Hettinger, Slope | 60 min |
| Jul 20, 2:15 AM MDT | Severe Thunderstorm Warning | BIS | Bowman | 60 min |
| Jul 20, 2:53 AM MDT | Severe Thunderstorm Warning | BIS | Morton | 37 min |
| Jul 20, 3:17 AM MDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 58 min |
| Jul 20, 4:07 AM MDT | Severe Thunderstorm Warning | BIS | Grant | 68 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1987Every severe thunderstorm warning in 1987
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.