Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 39, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 27, 1990, 8:05 AM CDT for Cavalier County, Pembina County, North Dakota. It was in force for 70 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 27, 1990, 8:05 AM CDT (13:05 UTC)
- Expired
- Aug 27, 1990, 9:15 AM CDT
- In force
- 70 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Cavalier County, ND, Pembina 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 27, 8:15 AM CDT | Hail 1.75 | Cavalier, ND | |
| Aug 27, 8:35 AM CDT | Hail 2.5 | Pembina, ND | |
| Aug 27, 9:00 AM CDT | Hail 4.5 | Pembina, 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, 1.1 hours before the alert went out and 300 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
- 771 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFAR 271305
SVRFAR
NDC019-067-271400-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FARGO ND
805 AM CDT MON AUG 27 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 900 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTHEAST PART OF NORTH DAKOTA
EASTERN CAVALIER...SOUTHERN PEMBINA
AT 800 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES
NORTHWEST OF GRAFTON NORTH DAKOTA OR JUST NORTH OF LANGDON MOVING
SOUTHEAST AT 50 MILES AN HOUR. SOME TOWNS IN THE WARNING AREWhat 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 27, 7:37 AM CDT, 28 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-271330- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 736 AM CDT MON AUG 27 1990 ...INTENSE THUNDERSTORM MOVING INTO NORTHEAST NORTH DAKOTA... AT 725 AM CDT...AN INTENSE THUNDERSTORM WAS CROSSING THE INTERNATIONAL BORDER 90 MILES NORTHWEST OF GRAND FORKS NORTH DAKOTA. THE STORM WAS ENTERING THE NORTHWEST CORNER OF CAVALIER COUNTY. IN ADDITION TO VERY HEAVY RAIN THIS STORM COULD PRODUCE HAIL...STRONG WIND GUSTS...AND FREQUENT DANGEROUS LIGHTNING STRIKES. MOVEMENT OF THE THUNDERSTORM WAS SOUTHEAST 30 MILES AN HOUR AND WILL BE NEAR THE TOWN OF LANGDON NORTH DAKOTA BY 830 AM CDT. SOME OTHER TOWNS I~N THE PATH OF THE STORM ARE HANNAH AND MOWBRAY. IF YOU ARE IN THE PATH OF THIS INTENSE THUNDERSTORM STAY ALERT FOR THE ABOVE MENTIONED CONDITIONS...AND TAKE SHELTER INDOORS IF THREATENING WEATHER APPOACHES YOUR LOCATION. DM
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.