Alert archive / Minnesota / Tornado Warnings in 2012
Tornado Warning 10, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 3, 2012, 6:39 PM CDT for Clay County, Norman County, Minnesota; Cass County, Traill County, North Dakota. It was in force for 51 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
- Aug 3, 2012, 6:39 PM CDT (23:39 UTC)
- Expired
- Aug 3, 2012, 7:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Clay County, MN, Norman County, MN, Cass County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 48 km from the middle of the area, began a volume at 23:40 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 |
|---|---|---|---|
| Aug 3, 6:40 PM CDT | HAIL 0.88 | Grandin, ND | NEAR MM 91 ON INTERSTATE 91 -- PEA TO NICKEL SIZE HAIL. |
| Aug 3, 6:45 PM CDT | HAIL 1.25 | 4 Nnw Gardner, ND | REPORTED ON I-29 NORTH OF GARDNER. TIME AND EXACT LOCATION ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Aug 3, 2:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.7 hours before the alert went out and 288 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
- 254 J/kg
- Mixed-layer CIN
- -271 J/kg
- Mixed-layer LCL
- 1688 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
694 WFUS53 KFGF 032339 TORFGF MNC027-107-NDC017-097-040030- /O.NEW.KFGF.TO.W.0010.120803T2339Z-120804T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 639 PM CDT FRI AUG 3 2012 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN CLAY COUNTY IN NORTHWEST MINNESOTA... SOUTHWESTERN NORMAN COUNTY IN NORTHWEST MINNESOTA... NORTHEASTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA... SOUTHEASTERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 730 PM CDT * AT 636 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 4 MILES WEST OF GARDNER...OR 21 MILES NORTHWEST OF FARGO... MOVING TO THE NORTHEAST AT 25 MPH. HAIL TO ONE INCH IN DIAMETER IS ALSO POSSIBLE WITH THIS STORM. * THE TORNADIC STORM WILL BE NEAR... GARDNER AROUND 645 PM CDT. GRANDIN AROUND 650 PM CDT. PERLEY AROUND 705 PM CDT. HENDRUM AROUND 710 PM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM INCLUDE HALSTAD AND BORUP. FOR MOTORISTS ON INTERSTATE 29...THE TORNADIC STORM WILL BE BETWEEN...MILE MARKER 84 AROUND 645 PM CDT...AND MILE MARKER 90 AROUND 650 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4742 9668 4715 9646 4705 9710 4723 9723 TIME...MOT...LOC 2339Z 241DEG 20KT 4715 9703 $$ PR/BB
2 follow-up statements
603 WWUS53 KFGF 040005 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 705 PM CDT FRI AUG 3 2012 MNC027-107-NDC017-097-040030- /O.CON.KFGF.TO.W.0010.000000T0000Z-120804T0030Z/ NORMAN MN-CASS ND-TRAILL ND-CLAY MN- 705 PM CDT FRI AUG 3 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN CLAY AND SOUTHWESTERN NORMAN COUNTIES IN NORTHWEST MINNESOTA...AND SOUTHEASTERN TRAILL AND NORTHEASTERN CASS COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL 730 PM CDT... AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES WEST OF PERLEY...OR 20 MILES NORTH OF FARGO...MOVING TO THE EAST AT 20 MPH. THE TORNADIC STORM WILL BE NEAR... PERLEY AROUND 715 PM CDT. HENDRUM AROUND 720 PM CDT. HALSTAD AROUND 725 PM CDT. BORUP AROUND 730 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4707 9698 4729 9705 4742 9668 4715 9646 TIME...MOT...LOC 0005Z 248DEG 18KT 4717 9686 $$ PR/BB
828 WWUS53 KFGF 040025 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 725 PM CDT FRI AUG 3 2012 MNC027-107-NDC017-097-040035- /O.EXP.KFGF.TO.W.0010.000000T0000Z-120804T0030Z/ NORMAN MN-CASS ND-TRAILL ND-CLAY MN- 725 PM CDT FRI AUG 3 2012 ...THE TORNADO WARNING FOR NORTHWESTERN CLAY AND SOUTHWESTERN NORMAN COUNTIES IN NORTHWEST MINNESOTA...AND SOUTHEASTERN TRAILL AND NORTHEASTERN CASS COUNTIES IN SOUTHEAST NORTH DAKOTA WILL EXPIRE AT 730 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 4707 9698 4729 9705 4742 9668 4715 9646 TIME...MOT...LOC 0025Z 248DEG 18KT 4721 9672 $$ ROGERS
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:33 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Otter Tail, Wilkin | 57 min |
| Aug 3, 6:34 PM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 56 min |
| Aug 3, 3:21 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy, Griggs, Nelson, Ramsey | 54 min |
| Aug 3, 3:29 PM CDT | Special Weather Statement | FGF | Cavalier | 61 min |
| Aug 3, 3:58 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Griggs, Nelson, Ramsey, Walsh | 49 min |
| Aug 3, 5:30 PM CDT | Special Weather Statement | FGF | Ransom, Richland | 45 min |
| Aug 3, 5:45 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland, Sargent | 60 min |
Nearby
Tornado Warnings in Minnesota, 2012Tornado Warnings in North Dakota, 2012Every tornado warning in 2012Tornadoes in 2012
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.