Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 74, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 27, 1997, 11:00 PM CDT for Traill County, North Dakota. It was in force for 40 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 27, 1997, 11:00 PM CDT (04:00 UTC)
- Expired
- Jun 27, 1997, 11:40 PM CDT
- In force
- 40 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 15 km from the middle of the area, began a volume at 04:02 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 27, 11:30 PM CDT | Hail 1 | Portland, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 27, 5:00 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 27, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 4.0 hours before the alert went out and 278 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
- 2650 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 2377 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.3
The text
As transmitted, in the capitals the NWS used until 2016.
688 WUUS1 KFAR 280409 RRA SVRFAR NDC097-280430- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1100 PM CDT FRI JUN 27 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1140 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST NORTH DAKOTA ...NORTHERN TRAILL COUNTY AT 1110 PM CDT...DOPPLER WEATHER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED 25 MILES SOUTHWEST OF GRAND FORKS...NEAR THE TOWN OF HATTON. MOVEMENT WAS EAST AT 15 MPH. TOWNS IN THE PATH INCLUDE BUXTON. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DONT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. RA
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.
NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 8:53 PM CDT, 2 hours 7 minutes earlier.
Area forecast discussion, Jun 27, 8:53 PM CDT, 2 hours 7 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 850 PM CDT FRI JUN 27 1997 HAVE NOT HAD ALOT OF TIME TO LOOK AT ANY RAPID UPDATE MODELS WITH SEVERE WX. SFC FRONT FROM NW TIP OF MN TO BETWEEN BIS AND JMS SHOWING VERY SLOW EASTWARD MOVEMENT AND PROGS KEEP BOUNDARY NEARLY STATIONARY OVERNIGHT. AIRMASS AHEAD OF FRONT VERY UNSTABLE WITH ADAP LI'S TO -10 AND SFC TD'S AOB 70. 00Z INL SOUNDING HAD A B+ AROUND 3000 J/KG. ALSO INL SOUNDING HAD K INDEX OF 34...PWAT 1.36 ALONG WITH GOOD THICKNESS DIFLUENCE OVER MN. ALSO RESPECTABLE MOIST CONVERGENC JUST EAST OF BOUNDARY. WILL KEEP FLASH FLOOD WATCH GOING ALONG WITH CHC OF TSRA. ONLY Q4UESTIONABLE AREA IS IN DVL WHICH IS BEHIND FRONT. WILL SPLIT OFF AREA AND DROP CHC OF TSRA. TEMPS SEEM IN THE BALL PARK...WILL TAKE A LAST LOOK AT UPDATE TIME. WILL PROBABLY HOLD OFF ON UPDATE TILL FIRST WATCH AREA EXPIRES. VOELKER
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 9:20 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 25 min |
| Jun 27, 9:40 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 35 min |
| Jun 27, 10:05 PM CDT | Tornado Warning | FGF | Nelson | 25 min |
| Jun 27, 10:26 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 34 min |
| Jun 27, 10:52 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 38 min |
| Jun 27, 11:20 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 30 min |
| Jun 27, 11:33 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 27 min |
| Jun 27, 11:50 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 25 min |
| Jun 27, 11:54 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 36 min |
| Jun 28, 12:08 AM CDT | Tornado Warning | FGF | Grand Forks, Steele | 32 min |
| Jun 28, 12:42 AM CDT | Severe Thunderstorm Warning | FGF | Steele | 33 min |
| Jun 28, 1:13 AM CDT | Severe Thunderstorm Warning | FGF | Steele | 32 min |
| Jun 28, 8:18 AM CDT | Severe Thunderstorm Warning | FGF | Ransom | 27 min |
| Jun 28, 8:47 AM CDT | Severe Thunderstorm Warning | FGF | Ransom | 28 min |
| Jun 28, 9:52 AM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 38 min |
| Jun 28, 10:29 AM CDT | Severe Thunderstorm Warning | FGF | Richland, Sargent | 31 min |
| Jun 28, 11:02 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 28 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.