Alert archive / North Dakota / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 10, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jun 28, 1989, 3:53 PM MDT for Mercer County, North Dakota. It was in force for 52 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
- Jun 28, 1989, 3:53 PM MDT (21:53 UTC)
- Expired
- Jun 28, 1989, 4:45 PM MDT
- In force
- 52 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Mercer 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 |
|---|---|---|---|
| Jun 28, 4:10 PM MDT | Hail 1.75 | Mercer, 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, 9.9 hours before the alert went out and 105 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
- 357 J/kg
- Mixed-layer CIN
- -405 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
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, Jun 28, 2:56 PM MDT, 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 355 PM CDT WED JUN 28 1989 AT 355 PM CDT THUNDERSTORMS WERE DEVELOPING RAPIDLY IN WESTERN NORTH DAKOTA. THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS AND POSSIBLE HAIL WERE LOCATED IN GOLDEN VALLEY...BILLINGS AND DUNN COUNTIES OF WESTERN NORTH DAKOTA. WEATHER CONDITIONS ARE FAVORABLE FOR THE FORMATION OF SEVERE THUNDERSTORMS IN WESTERN AND CENTRAL NORTH DAKOTA THIS EVENING AND EARLY TONIGHT. PERSONS IN WESTERN AND CENTRAL NORTH DAKOTA SHOULD BE ALERT FOR THUNDERSTORM DEVELOPMENT AND TAKE COVER IF THREATENING WEATHER IS SIGHTED. ...TORNADO WATCH IN EFFECT UNTIL 11 PM FOR THE WESTERN HALF OF NORTH DAKOTA... VAN ESS
Special weather statement, Jun 28, 3:47 PM MDT, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 447 PM CDT WED JUN 28 1989 ...A TORNADO WATCH IN EFFECT FOR WESTERN NORTH DAKOTA UNTIL 11 PM CDT THIS EVENING... A TORNADO WATCH HAS BEEN ISSUED FOR WESTERN NORTH DAKOTA UNTIL 11 PM CDT THIS WEDNESDAY EVENING. AT 440 PM WEATHER RADARS SHOWED A BAND OF VERY STRONG THUNDERSTORMS IN WESTERN NORTH DAKTA EXTENDING FROM THE BADLANDS TO THE EASTERN END OF LAKE SAKAKAWEA. AT 442 PM CDT...GOLF BALL SIZE HAIL WAS REPORTED MEDORA...ABOUT 35 MILES WEST OF DICKINSON. WEATHER RADARS SHOWED ALL OF THESE STRONG THUNDERSTORMS MOVING NORTH NORTHEAST 30 TO 40 MPH. LM
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 6:29 PM MDT | Severe Thunderstorm Warning | BIS | Emmons, Sioux | 46 min |
| Jun 28, 3:08 PM MDT | Severe Thunderstorm Warning | BIS | Billings | 67 min |
| Jun 28, 3:58 PM MDT | Tornado Warning | BIS | Billings | 32 min |
| Jun 28, 4:09 PM MDT | Tornado Warning | BIS | Dunn | 36 min |
| Jun 28, 4:36 PM MDT | Severe Thunderstorm Warning | BIS | McLean | 54 min |
| Jun 28, 5:04 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 26 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1989Every severe thunderstorm warning in 1989
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.