Alert archive / Minnesota / Tornado Warnings in 2017
Tornado Warning 32, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 11, 2017, 7:19 PM CDT for Norman County, Polk County, Minnesota; Cass County, Traill County, North Dakota. It was in force for 41 min. 8 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
- Jul 11, 2017, 7:19 PM CDT (00:19 UTC)
- Expired
- Jul 11, 2017, 8:00 PM CDT
- In force
- 41 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
Counties Norman County, MN, Polk County, MN, Cass County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 16 km from the middle of the area, began a volume at 00:18 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 11, 7:24 PM CDT | TORNADO | 7 E Mayville, ND | LARGE MULTI-VORTEX TORNADO MOVING TOWARDS THE INTERSTATE NEAR CUMMINGS. |
| Jul 11, 7:45 PM CDT | TORNADO 2 | 4 Ese Hillsboro, ND | THIS TORNADO DEVELOPED FROM THE MAIN MESOCYCLONE AS ITS PREDECESSOR ROPED OUT. IT TRACKED ESE FOR ROUGHLY 6 MILES BEFORE IT CROSSED THE RED RIVER ABOUT 1W OF HALSTAD MN AROUND 8 PM CDT. IT THEN CONTINUED TO TRACK ESE FOR ANOTHER 5 MILES TO AROUND 4 ESE OF HALS |
| Jul 11, 7:48 PM CDT | TORNADO 2 | 4 Ese Hillsboro, ND | THIS TORNADO DEVELOPED FROM THE MAIN MESOCYCLONE AS ITS PREDECESSOR ROPED OUT. IT TRACKED ESE FOR ROUGHLY 6 MILES BEFORE IT CROSSED THE RED RIVER ABOUT 1W OF HALSTAD MN AROUND 8 PM CDT. IT THEN CONTINUED TO TRACK ESE FOR ANOTHER 5 MILES TO AROUND 4 ESE OF HALS |
| Jul 11, 7:50 PM CDT | HAIL 1.75 | 2 W Caledonia, ND | LARGE HAIL AND STRONG WINDS LASTED FOR SEVERAL MINUTES ACROSS EASTERN CALEDONIA TOWNSHIP. |
| Jul 11, 7:56 PM CDT | HAIL 0.75 | 1 S Cummings, ND | |
| Jul 11, 8:00 PM CDT | TSTM WND GST 79 | 7 Se Hillsboro, ND | NDAWN PEAK GUST |
| Jul 11, 8:03 PM CDT | HAIL 1.75 | 1 Nnw Hillsboro, ND | |
| Jul 11, 8:05 PM CDT | TSTM WND DMG | Halstad, MN | SHED DESTROYED AND NUMEROUS TREES UPROOTED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 11, 4:48 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 282 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
- 124 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 2827 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
354
WFUS53 KFGF 120019
TORFGF
MNC107-119-NDC017-097-120100-
/O.NEW.KFGF.TO.W.0032.170712T0019Z-170712T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
719 PM CDT TUE JUL 11 2017
The National Weather Service in Grand Forks has issued a
* Tornado Warning for...
Northwestern Norman County in northwestern Minnesota...
Southwestern Polk County in northwestern Minnesota...
Northern Cass County in southeastern North Dakota...
Traill County in southeastern North Dakota...
* Until 800 PM CDT.
* At 719 PM CDT, a confirmed tornado was located near Cummings, or 26
miles south of Grand Forks, moving southeast at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Weather spotters confirmed tornado.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
* The tornado will be near...
Cummings around 730 PM CDT.
Hillsboro around 740 PM CDT.
Caledonia and Kelso around 745 PM CDT.
Shelly around 750 PM CDT.
Halstad around 800 PM CDT.
Other locations impacted by this tornadic thunderstorm include
American Crystal Sugar.
This includes Interstate 29 between mile markers 92 and 121.
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 4744 9743 4767 9723 4767 9713 4749 9658
4718 9691
TIME...MOT...LOC 0019Z 305DEG 29KT 4754 9719
TORNADO...OBSERVED
HAIL...1.00IN
$$
JH2 follow-up statements
887
WWUS53 KFGF 120031
SVSFGF
Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
731 PM CDT TUE JUL 11 2017
MNC107-119-NDC017-097-120100-
/O.CON.KFGF.TO.W.0032.000000T0000Z-170712T0100Z/
Norman MN-Polk MN-Cass ND-Traill ND-
731 PM CDT TUE JUL 11 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHWESTERN NORMAN...SOUTHWESTERN POLK...NORTHERN CASS AND TRAILL
COUNTIES...
At 728 PM CDT, a confirmed tornado was located over Cummings, or 29
miles south of Grand Forks, moving southeast at 35 mph.
HAZARD...Damaging tornado and half dollar size hail.
SOURCE...Weather spotters confirmed tornado. At 724 PM CDT, a large
multi-vortex tornado was reported west of Cummings ND.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Hillsboro around 740 PM CDT.
Caledonia around 745 PM CDT.
Shelly around 750 PM CDT.
Halstad around 755 PM CDT.
Other locations impacted by this tornadic thunderstorm include
American Crystal Sugar.
This includes Interstate 29 between mile markers 92 and 121.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 4744 9743 4767 9723 4767 9713 4749 9658
4718 9691
TIME...MOT...LOC 0028Z 305DEG 29KT 4749 9709
TORNADO...OBSERVED
HAIL...1.25IN
$$
JH922
WWUS53 KFGF 120050 RRA
SVSFGF
Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
750 PM CDT TUE JUL 11 2017
MNC107-119-NDC017-097-120100-
/O.CON.KFGF.TO.W.0032.000000T0000Z-170712T0100Z/
Norman MN-Polk MN-Cass ND-Traill ND-
750 PM CDT TUE JUL 11 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHWESTERN NORMAN...SOUTHWESTERN POLK...NORTHERN CASS AND TRAILL
COUNTIES...
At 748 PM CDT, a confirmed tornado was located near Hillsboro, or 32
miles south of Grand Forks, moving southeast at 15 mph.
HAZARD...Damaging tornado and half dollar size hail.
SOURCE...Weather spotters confirmed tornado. At 742 PM CDT, radar
indicted a tornado just northeast of Hillsboro ND.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Shelly, Halstad and Caledonia around 800 PM CDT.
Other locations impacted by this tornadic thunderstorm include
American Crystal Sugar.
This includes Interstate 29 between mile markers 92 and 121.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 4744 9743 4767 9723 4767 9713 4749 9658
4718 9691
TIME...MOT...LOC 0048Z 298DEG 14KT 4745 9700
TORNADO...OBSERVED
HAIL...1.25IN
$$
JHThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:02 PM CDT | Tornado Warning | FGF | Polk | 43 min |
| Jul 11, 7:12 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 36 min |
| Jul 11, 7:47 PM CDT | Tornado Warning | FGF | Pennington, Polk, Red Lake | 27 min |
| Jul 11, 7:59 PM CDT | Tornado Warning | FGF | Clay, Norman, Polk | 46 min |
| Jul 11, 8:19 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 56 min |
| Jul 11, 8:34 PM CDT | Tornado Warning | FGF | Becker, Clay, Mahnomen, Norman | 41 min |
| Jul 11, 9:14 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Mahnomen, Norman, Otter Tail | 61 min |
| Jul 11, 9:25 PM CDT | Severe Thunderstorm Warning | FGF | Grant | 35 min |
| Jul 11, 9:43 PM CDT | Severe Thunderstorm Warning | FGF | Grant, Otter Tail | 62 min |
| Jul 11, 10:08 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Hubbard, Otter Tail, Wadena | 67 min |
| Jul 11, 10:38 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Otter Tail | 67 min |
| Jul 11, 7:10 PM CDT | Areal Flood Advisory | FGF | Grand Forks | 110 min |
| Jul 11, 7:30 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 41 min |
Nearby
Tornado Warnings in Minnesota, 2017Tornado 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.