Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 52, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 6, 1990, 8:11 PM MDT for Mercer County, North Dakota. It was in force for 49 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 6, 1990, 8:11 PM MDT (02:11 UTC)
- Expired
- Jul 6, 1990, 9:00 PM MDT
- In force
- 49 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 |
|---|---|---|---|
| Jul 6, 8:54 PM MDT | Thunderstorm Wind 0 | 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 00:00Z, 2.2 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
- 1589 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1838 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 13.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBIS 070211
SVRBIS
NDC057-070300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
811 PM MDT FRI JUL 6 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE CENTRAL PART OF NORTH DAKOTA
EASTERN MERCER
AT 910 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 50 MILES SOUTH
OF MINOT OR 20 MILES WEST OF THE GARRISON DAM. THE THUNDERSTORM
WAS MOVING EAST AT 40 MILES AN HOUR AND WILL MOVE INTO GARRISON
DAM AND THE SAKAKAWEA STATE PARK AND PICK CITY AREAS.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAIN MAY FLOOD ROADWAYS QUICKLY
SO AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.
REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY.
BOATERS ON THE EAST END OF LAKE SAKAKAWEA IN THE GARRISON DAM
AREA SHOULD SEEK SAFE SHELTER IMMEDJIATELY.
VAN ESSWhat 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 6, 5:35 PM MDT, 2 hours 36 minutes before
NDZ001>011-070030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 630 PM CDT FRI JUL 6 1990 ...THUNDERSTORMS DEVELOPING IN WESTERN NORTH DAKOTA... AT 620 PM CDT...RADARS SHOWED SCATTERED THUNDERSTORMS BEGINNING TO DEVELOP IN WESTERN NORTH DAKOTA. THE STRONGEST STORM WAS LOCATED OVER THE NORTH UNIT OF THEODORE ROOSEVELT NATIONAL PARK...WHICH IS ABOUT 40 MILES SOUTHEAST OF WILLISTON. THIS STORM HAD GROWN VERY RAPIDLY AND LIKELY CONTAINED BRIEF HEAVY RAIN. OTHER LESS INTENSE STORMS WERE DETECTED IN THE SOUTHWEST PART OF THE STATE. ONE WAS LOCATED ABOUT 10 MILES SOUTH OF NEW ENGLAND OR 35 MILES SOUTH OF DICKINSON. THE OTHER STORM WAS IN THE SOUTHWEST TIP OF THE STATE OVER T$HE TOWN OF BOWMAN. THESE STORMS HAD RECENTLY DEVELOPED AND MOVEMENT COULD NOT BE DETERMINED. LM
Special weather statement, Jul 6, 6:32 PM MDT, 1 hour 39 minutes before
NDZ001>011-070130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 730 PM CDT FRI JUL 6 1990 ...THUNDERSTORMS IN WESTERN NORTH DAKOTA... AT 720 PM CDT...RADARS SHOWED A SCATTERED LINE OF THUNDERSTORMS IN WESTERN NORTH DAKOTA. THE LINE EXTENDED FROM THE KILDEER MOUNTAINS... 60 MILES NORTH OF DICKINSON...TO NEAR REEDER...55 MILES SOUTH OF DICKINSON. A SEVERE THUNDERSTORM WAS AT THE NORTH END OF THIS LINE IN THE KILDEER MOUNTAINS. A%NOTHER STRONG THUNDERSTORM WAS AT THE SOUTH END OF THE LINE NEAR REEDER. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 30 MPH. HEAVY RAIN...HAIL...STRONG WINDS...AND FREQUENT LIGHTNING ARE LIKELY WITH THESE THUNDERSTORMS.
Special weather statement, Jul 6, 7:38 PM MDT, 33 minutes before
NDZ003-070145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 830 AM CDT FRI JUL 6 1990 ...TORNADO WARNING IN EFFECT FOR WESTERN NORTH DAKOTA UNTIL 2 AM CDT... ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST DUNN COUNTY IS CANCELLED... THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST DUNN COUNTY HAS BEEN CANCELLED. THE THUNDERSTORM HAS MOVED EAST OF THE COUNTY AND HAS WEAKENED. THERE IS NO OTHER THREATING WEATHER IN DUNN COUNT Y AT THIS TIME. REMEMBER A TORNADO WATCH IS IN EFFECT FOR WESTERN NORTH DAKOTA UNTIL 2AM CDT OR 1AM MDT. KENNEDY
Special weather statement, Jul 6, 7:47 PM MDT, 24 minutes before
NDZ001>011-070230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 845 PM CDT FRI JUL 6 1990 ...TORNADO WATCH IN EFFECT FOR WESTERN AND PARTS OF CENTRAL NORTH DAKOTA UNTIL 2 AM CDT... AT 840 PM CDT A LINE OF STRONG THUNDERSTORMS WAS MOVING ACROSS WESTERN NORTH DAKOTA. THE LINE EXTENDED FROM 25 MILES WEST OF MINOT NEAR BERTHOLD TO 50 MILES SOUTH OF DICKINSON NEAR HETTINGER. THE STRONGEST THUNDERSTORMS WERE LOCATED 25 MILES EAST OF DICKINSON IN EASTERN STARK COUNTY AND 50 MILES SOUTHWEST OF MINOT OVER LAKE SAKAKAWEA. THESE THUNDERSTORMS WILL PRODUCE EXTREMELY HEAVY RAIN... HAIL AND STRONG WINDS. THE THUNDERSTORMS IN THE LINE WERE DEVELOPING RAPIDLY AND MOVING EAST AT 40( MILES AN HOUR. PEOPLE IN CENTRAL NORTH DAKOTA SHOULD STAY ALERT FOR RAPIDLY CHANGING CONDITIONS AS THE THUNDERSTORMS APPROACH. VAN ESS
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 6:06 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 39 min |
| Jul 6, 6:55 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 65 min |
| Jul 6, 8:22 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau | 48 min |
| Jul 6, 9:03 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 57 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1990Every severe thunderstorm warning in 1990
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.