Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 127, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 16, 1997, 12:33 AM CDT for Walsh County, North Dakota. It was in force for 42 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 16, 1997, 12:33 AM CDT (05:33 UTC)
- Expired
- Jul 16, 1997, 1:15 AM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 98 km from the middle of the area, began a volume at 05:45 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 |
|---|---|---|---|
| Jul 16, 12:45 AM CDT | Thunderstorm Wind | Voss, ND | A metal shed was blown down in Voss. |
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 nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.6 hours before the alert went out and 286 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
- 66 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 3288 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 160533 RRA SVRFAR NDC099-160615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1233 AM CDT WED JUL 16 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST NORTH DAKOTA ...EASTERN WALSH COUNTY AT 1230 AM RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES NORTHWEST OF FOREST RIVER NORTH DAKOTA OR ABOUT 40 MILES SOUTHEAST OF LANGDON. THIS STORM WAS MOVING SOUTHEAST AT 25 MILES AN HOUR. THIS STORM WILL AFFECT THE TOWNS OF MINTO AND FOREST RIVER BY 1 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. EWENS
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 Jul 15, 8:54 PM CDT, 3 hours 39 minutes earlier.
Area forecast discussion, Jul 15, 8:54 PM CDT, 3 hours 39 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 854 PM CDT TUE JUL 15 1997 SVRL STG TSTMS OCCURRING NR THE NW ANGLE. RPTS FROM SERN MB INDICATE BRIEF TORNADOES AND LARGE HAIL. MARBLE SIZED HAIL AT ANGLE INLET AT 835 PM LT. STGEST TSTMS JUST ON THE EDGE OF THE CAP ALG SFC FNT WHICH HAS SAGGED INTO NERN NODAK. ISOLD TSTMS DVLPG IN NERN NODAK. CAPES FAIRLY STG NR 3000 J/KG AND SOME WK CONVERGENCE ALG FNT. CURRENT FCST OK FOR NOW BUT WHAT TO DO IF ISOLD TSRMS CONT AFT DARK AS FNT PROGGD TO SLOLY PUSH S OVRNITE. FOR NOW BLV TSTMS WL DIE SHORTLY AFT SUNSET. WL HOLD OFF ON FCST UPDATE TIL NO LTR THAN 0345Z. BELLES
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.