Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 17, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2012, 7:34 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 41 min. 3 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
- Jun 7, 2012, 7:34 PM CDT (00:34 UTC)
- Expired
- Jun 7, 2012, 8:15 PM CDT
- In force
- 41 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Polk County, MN, Grand Forks County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 59 km from the middle of the area, began a volume at 00:36 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 |
|---|---|---|---|
| Jun 7, 7:34 PM CDT | HAIL 1 | 4 Ssw Grand Forks, ND | LARGE HAIL AND STRONG WINDS. |
| Jun 7, 7:50 PM CDT | TSTM WND DMG | 5 N East Grand Forks, MN | SEVERAL LARGE 3-5 INCH DIAMETER TREE BRANCHES BROKEN DOWN IN SHELTER BELT. ONE TREE WAS SPLIT BY LIGHTNING. |
| Jun 7, 7:52 PM CDT | HAIL 0.75 | 1 Sw Grand Forks, ND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 0.6 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
- 77 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1719 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
779 WUUS53 KFGF 080034 SVRFGF MNC119-NDC035-080115- /O.NEW.KFGF.SV.W.0017.120608T0034Z-120608T0115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 734 PM CDT THU JUN 7 2012 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA... EASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 815 PM CDT * AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 4 MILES NORTH OF THOMPSON...OR 6 MILES SOUTH OF GRAND FORKS...MOVING TO THE NORTH AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... GRAND FORKS...MALLORY AND DAVIDSON AROUND 740 PM CDT. EAST GRAND FORKS AROUND 745 PM CDT. MEKINOCK AROUND 750 PM CDT. SHERACK AND MANVEL AROUND 800 PM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE GRAND FORKS AFB AND TABOR. FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE BETWEEN...MILE MARKER 133 AROUND 735 PM CDT...AND MILE MARKER 143 AROUND 750 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED BUILDING IMMEDIATELY. && LAT...LON 4817 9673 4772 9686 4782 9745 4818 9731 TIME...MOT...LOC 0034Z 193DEG 29KT 4785 9707 WIND...HAIL 60MPH 1.00IN $$ HOPPES
2 follow-up statements
077
WWUS53 KFGF 080059
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
759 PM CDT THU JUN 7 2012
MNC119-NDC035-080115-
/O.CON.KFGF.SV.W.0017.000000T0000Z-120608T0115Z/
GRAND FORKS ND-POLK MN-
759 PM CDT THU JUN 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
POLK COUNTY IN NORTHWEST MINNESOTA...AND NORTHEASTERN GRAND FORKS
COUNTY IN NORTHEAST NORTH DAKOTA UNTIL 815 PM CDT...
AT 755 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED NEAR EAST
GRAND FORKS...OR 3 MILES NORTHEAST OF GRAND FORKS...MOVING TO THE
NORTH AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
SHERACK AND MANVEL AROUND 810 PM CDT.
TABOR AROUND 815 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.
&&
LAT...LON 4817 9673 4778 9684 4787 9743 4795 9741
4818 9731
TIME...MOT...LOC 0059Z 195DEG 27KT 4797 9701
$$
HOPPES392
WWUS53 KFGF 080115
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
815 PM CDT THU JUN 7 2012
MNC119-NDC035-080125-
/O.EXP.KFGF.SV.W.0017.000000T0000Z-120608T0115Z/
GRAND FORKS ND-POLK MN-
815 PM CDT THU JUN 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN POLK COUNTY IN
NORTHWEST MINNESOTA...AND NORTHEASTERN GRAND FORKS COUNTY IN
NORTHEAST NORTH DAKOTA HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
LAT...LON 4817 9673 4778 9684 4787 9743 4795 9741
4818 9731
TIME...MOT...LOC 0059Z 195DEG 27KT 4797 9701
$$
HOPPESThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 7:20 PM CDT | Special Weather Statement | FGF | Ramsey | 40 min |
| Jun 7, 7:41 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Nelson, Walsh | 49 min |
| Jun 7, 7:58 PM CDT | Special Weather Statement | FGF | Ramsey, Towner | 62 min |
| Jun 7, 8:19 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey, Walsh | 56 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2012Severe Thunderstorm Warnings in North Dakota, 2012Every severe thunderstorm warning 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.