Alert archive / North Dakota / Tornado Warnings in 2017
Tornado Warning 38, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Sep 1, 2017, 7:15 PM CDT for Griggs County, Steele County, North Dakota. It was in force for 30 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 1, 2017, 7:15 PM CDT (00:15 UTC)
- Expired
- Sep 1, 2017, 7:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Griggs County, ND, Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 49 km from the middle of the area, began a volume at 00:17 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 |
|---|---|---|---|
| Sep 1, 7:15 PM CDT | FUNNEL CLOUD | 6 Ne Cooperstown, ND | BRIEF FUNNEL CLOUD OBSERVED JUST WEST OF THE STEELE COUNTY COUNTY LINE IN FAR SOUTHEAST ROMNESS TOWNSHIP. |
| Sep 1, 7:15 PM CDT | FUNNEL CLOUD | 7 Ne Cooperstown, ND | FUNNEL CLOUD OBSERVED JUST WEST OF THE STEELE COUNTY COUNTY LINE IN FAR SOUTHEAST ROMNESS TOWNSHIP. |
| Sep 1, 7:16 PM CDT | TORNADO 0 | 7 Ne Cooperstown, ND | THIS TORNADO TRACKED INTERMITTENTLY FOR ABOUT 2 MILES ACROSS A PORTION OF THE SHEYENNE RIVER VALLEY AND ALONG THE STEELE COUNTY LINE TO AROUND 7 WSW OF FINLEY BY 722 PM CDT. LARGE TREE BRANCHES WERE BROKEN DOWN IN VARIOUS SHELTER BELTS AND GROVES ALONG THE PAT |
| Sep 1, 7:30 PM CDT | TSTM WND DMG | 6 Sw Finley, ND | SEVERAL LARGE 4 TO 8 INCH DIAMETER TREE BRANCHES SNAPPED IN A FARMSTEAD SHELTER BELT NEAR CR25 NORTH OF HIGHWAY 200, IN WEST CENTRAL GREENVIEW TOWNSHIP. |
| Sep 1, 7:54 PM CDT | TSTM WND GST 50 | 5 Nw Hope, ND | PEAK WINDS MEASURED AT A PERSONAL WEATHER STATION. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 220 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
- 52 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1869 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
053 WFUS53 KFGF 020015 TORFGF NDC039-091-020045- /O.NEW.KFGF.TO.W.0038.170902T0015Z-170902T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED Tornado Warning National Weather Service Eastern ND/Grand Forks ND 715 PM CDT FRI SEP 1 2017 The National Weather Service in Grand Forks has issued a * Tornado Warning for... East central Griggs County in southeastern North Dakota... West central Steele County in southeastern North Dakota... * Until 745 PM CDT. * At 715 PM CDT, a severe thunderstorm capable of producing a tornado was located 7 miles southwest of Sharon, or 40 miles north of Valley City, moving southeast at 20 mph. HAZARD...Tornado and ping pong ball size hail. SOURCE...Radar indicated rotation. IMPACT...Expect damage to mobile homes, roofs, and vehicles. * This tornadic thunderstorm will remain over mainly rural areas of east central Griggs and west central Steele Counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Grand Forks. && LAT...LON 4751 9805 4754 9797 4738 9777 4732 9798 TIME...MOT...LOC 0015Z 320DEG 17KT 4751 9800 TORNADO...RADAR INDICATED HAIL...1.50IN $$ Lee
1 follow-up statement
820
WWUS53 KFGF 020030
SVSFGF
Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
730 PM CDT FRI SEP 1 2017
NDC039-091-020045-
/O.CON.KFGF.TO.W.0038.000000T0000Z-170902T0045Z/
Griggs ND-Steele ND-
730 PM CDT FRI SEP 1 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR EAST
CENTRAL GRIGGS AND WEST CENTRAL STEELE COUNTIES...
At 730 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles east of Cooperstown, or 35 miles north of Valley
City, moving southeast at 20 mph.
HAZARD...TORNADO and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
This tornadic thunderstorm will remain over mainly rural areas of
east central Griggs and west central Steele Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4747 9804 4750 9793 4738 9777 4732 9798
TIME...MOT...LOC 0030Z 337DEG 18KT 4744 9796
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
LeeThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 7:43 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Steele | 47 min |
| Sep 1, 8:01 PM CDT | Tornado Warning | FGF | Barnes, Cass, Steele | 29 min |
| Sep 1, 8:28 PM CDT | Special Weather Statement | FGF | Cass | 32 min |
| Sep 1, 8:59 PM CDT | Special Weather Statement | FGF | Cass | 46 min |
| Sep 1, 9:40 PM CDT | Special Weather Statement | FGF | Cass | 50 min |
Nearby
Tornado Warnings in North Dakota, 2017Every tornado warning in 2017Tornadoes in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.