Alert archive / North Dakota / Tornado Warnings in 2017
Tornado Warning 39, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Sep 1, 2017, 8:01 PM CDT for Barnes County, Cass County, Steele County, North Dakota. It was in force for 29 min. 2 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, 8:01 PM CDT (01:01 UTC)
- Expired
- Sep 1, 2017, 8:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Barnes County, ND, Cass County, ND, Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 48 km from the middle of the area, began a volume at 01:02 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 |
|---|---|---|---|
| Sep 1, 8:01 PM CDT | FUNNEL CLOUD | 2 Sw Hope, ND | PERSISTENT WALL CLOUD WITH BRIEF FUNNEL CLOUD EVIDENT. WALL CLOUD NEARLY RAIN WRAPPED. |
| Sep 1, 8:15 PM CDT | TSTM WND DMG | 8 Nw Page, ND | A FEW LARGE BRANCHES BROKEN DOWN IN SHELTER BELTS. CORN AND BEAN FIELDS FLATTENED IN SPOTS ACROSS NORTHWEST ROCHESTER AND NORTHEAST ELLSBURY TOWNSHIPS. TIME ESTIMATED BASED ON RADAR. |
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, 1.0 hours before the alert went out and 232 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.
896 WFUS53 KFGF 020101 TORFGF NDC003-017-091-020130- /O.NEW.KFGF.TO.W.0039.170902T0101Z-170902T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED Tornado Warning National Weather Service Eastern ND/Grand Forks ND 801 PM CDT FRI SEP 1 2017 The National Weather Service in Grand Forks has issued a * Tornado Warning for... Northwestern Cass County in southeastern North Dakota... Northeastern Barnes County in southeastern North Dakota... South central Steele County in southeastern North Dakota... * Until 830 PM CDT. * At 801 PM CDT, a severe thunderstorm capable of producing a tornado was located near Hope, or 27 miles northeast of Valley City, moving south at 35 mph. HAZARD...Tornado and quarter size hail. SOURCE...Radar indicated rotation. IMPACT...Expect damage to mobile homes, roofs, and vehicles. * Locations impacted include... Page, Ayr, Colgate, Pillsbury and Hope. 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 4730 9782 4733 9769 4702 9742 4697 9776 TIME...MOT...LOC 0101Z 338DEG 31KT 4727 9774 TORNADO...RADAR INDICATED HAIL...1.00IN $$ Lee
2 follow-up statements
543
WWUS53 KFGF 020118
SVSFGF
Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
818 PM CDT FRI SEP 1 2017
NDC003-091-020128-
/O.CAN.KFGF.TO.W.0039.000000T0000Z-170902T0130Z/
Barnes ND-Steele ND-
818 PM CDT FRI SEP 1 2017
...THE TORNADO WARNING FOR NORTHEASTERN BARNES AND SOUTH CENTRAL
STEELE COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4709 9771 4709 9770 4723 9770 4724 9766
4724 9761 4702 9742 4699 9771
TIME...MOT...LOC 0118Z 327DEG 24KT 4718 9765
$$
NDC017-020130-
/O.CON.KFGF.TO.W.0039.000000T0000Z-170902T0130Z/
Cass ND-
818 PM CDT FRI SEP 1 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHWESTERN CASS COUNTY...
At 818 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Page, or 24 miles northeast of Valley City, moving
southeast at 25 mph.
HAZARD...TORNADO and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
Locations impacted include...
Page, Ayr and Colgate.
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 4709 9771 4709 9770 4723 9770 4724 9766
4724 9761 4702 9742 4699 9771
TIME...MOT...LOC 0118Z 327DEG 24KT 4718 9765
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Lee716
WWUS53 KFGF 020129
SVSFGF
Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
829 PM CDT FRI SEP 1 2017
NDC017-020138-
/O.EXP.KFGF.TO.W.0039.000000T0000Z-170902T0130Z/
Cass ND-
829 PM CDT FRI SEP 1 2017
...THE TORNADO WARNING FOR NORTHWESTERN CASS COUNTY WILL EXPIRE AT
830 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire. However small hail
is still possible with this thunderstorm.
LAT...LON 4709 9771 4709 9770 4723 9770 4724 9766
4724 9761 4702 9742 4699 9771
TIME...MOT...LOC 0128Z 338DEG 31KT 4710 9760
$$
LeeThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 7:15 PM CDT | Tornado Warning | FGF | Griggs, Steele | 30 min |
| Sep 1, 7:43 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Steele | 47 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.