Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 49, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2014, 7:48 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 57 min. 14 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 21, 2014, 7:48 PM CDT (00:48 UTC)
- Expired
- Jul 21, 2014, 8:45 PM CDT
- In force
- 57 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), 51 km from the middle of the area, began a volume at 00:50 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 21, 7:51 PM CDT | TSTM WND GST 66 | 6 W Grand Forks, ND | PEAK WINDS MEASURED AT THE GRAND FORKS INTERNATIONAL AIRPORT /KGFK/. |
| Jul 21, 7:58 PM CDT | TSTM WND GST 69 | 6 W Grand Forks, ND | PEAK WIND AT THE GRAND FORKS INTERNATIONAL AIRPORT. WINDOW DAMAGE REPORTED AT THE TERMINAL BUILDING. |
| Jul 21, 8:05 PM CDT | TSTM WND GST 61 | 5 Nnw Grand Forks, ND | PEAK WINDS MEASURED AT THE GRAND FORKS NDDOT WIND SENSOR ALONG I-29. |
| Jul 21, 8:15 PM CDT | TSTM WND DMG | Grand Forks, ND | FIST SIZED...APPROX 3INCH DIAMETER...TREE BRANCH DOWN IN BACKYARD. |
| Jul 21, 8:15 PM CDT | TSTM WND DMG | Grand Forks, ND | 8 TO 10 INCH TREES DOWNED IN SOUTH GRAND FORKS 32ND AVE AND LEGEND LANE. TIME APPROXIMATE. |
| Jul 21, 8:17 PM CDT | TSTM WND GST 58 | 6 W Grand Forks, ND | PEAK WIND MEASURED AT THE GRAND FORKS INTERNATIONAL AIRPORT. |
| Jul 21, 8:35 PM CDT | TSTM WND DMG | 2 N Thompson, ND | TWO TREES...ONE 25 INCHES IN DIAMETER...THE OTHER 30 INCHES IN DIAMETER SNAPPED IN BACKYARD. |
| Jul 21, 8:35 PM CDT | TSTM WND DMG | 2 N Thompson, ND | TWO TREES...ONE 25 INCHES IN DIAMETER...THE OTHER 30 INCHES IN DIAMETER SNAPPED IN BACKYARD. POWER LINES KNOCKED DOWN IN THOMPSON. |
| Jul 21, 8:35 PM CDT | TSTM WND DMG | Grand Forks, ND | 3 TO 4 INCH TREE BRANCHES DOWN VICINITY OF GROUND ROUND ON 32 AV S. NUMEROUS SMALLER BRANCHES ON GROUND VICINITY OF POST OFFICE ON 28 AV S. |
| Jul 21, 8:35 PM CDT | TSTM WND DMG | Grand Forks, ND | TREE DOWN IN RESIDENTS BACKYARD ON UNIVERSITY AV. |
| Jul 21, 8:38 PM CDT | TSTM WND DMG | Holmes, ND | WIDESPREAD WIND DAMAGE NOTED IN SHELTER BELTS ACROSS UNION TOWNSHIP. NUMEROUS LARGE TREE BRANCHES AND LIMBS WERE BROKEN DOWN AND AN OCCASIONAL TREE TRUNK WAS SNAPPED. |
| Jul 21, 8:45 PM CDT | TSTM WND DMG | 7 Ese Thompson, ND | SEVERAL LARGE BRANCHES AND LIMBS BROKEN DOWN IN SHELTER BELTS ACROSS NORTHERN AMERICUS AND BENTRU TOWNSHIPS. |
| Jul 21, 8:55 PM CDT | FUNNEL CLOUD | 7 W Crookston, MN | FUNNEL CLOUD DESCENDED AND ASCENDED FROM ROTATING WALL CLOUD. RELAYED BY POLK S.O. |
| Jul 21, 8:55 PM CDT | FUNNEL CLOUD | 8 Wsw Crookston, MN | FUNNEL CLOUD DESCENDED AND ASCENDED FROM ROTATING WALL CLOUD. RELAYED BY POLK S.O. |
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 21, 5:07 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 0.8 hours before the alert went out and 280 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
- 3234 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1331 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
100
WUUS53 KFGF 220048
SVRFGF
MNC119-NDC035-220145-
/O.NEW.KFGF.SV.W.0049.140722T0048Z-140722T0145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
748 PM CDT MON JUL 21 2014
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...
EAST CENTRAL GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...
* UNTIL 845 PM CDT
* AT 745 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST
OF GRAND FORKS...AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
GRAND FORKS AND EAST GRAND FORKS AROUND 755 PM CDT.
MALLORY AND BYGLAND AROUND 800 PM CDT.
DAVIDSON AND FISHER AROUND 805 PM CDT.
KEY WEST AND SHERACK AROUND 815 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE ANGUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM...ON THE LOWEST FLOOR OF
A BUILDING.
&&
LAT...LON 4811 9665 4771 9671 4771 9737 4791 9738
TIME...MOT...LOC 0047Z 252DEG 33KT 4788 9714
HAIL...1.00IN
WIND...60MPH
$$
HOPPES1 follow-up statement
931
WWUS53 KFGF 220101
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
801 PM CDT MON JUL 21 2014
MNC119-NDC035-220145-
/O.CON.KFGF.SV.W.0049.000000T0000Z-140722T0145Z/
GRAND FORKS ND-POLK MN-
801 PM CDT MON JUL 21 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
POLK AND EAST CENTRAL GRAND FORKS COUNTIES UNTIL 845 PM CDT...
AT 757 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR EAST GRAND
FORKS...AND MOVING EAST AT 40 MPH.
HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED. AT 751 PM CDT 66 MPH WIND WAS REPORTED AT
THE GRAND FORKS AIRPORT.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE
TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
ROOFS AND OUTBUILDINGS.
THE SEVERE THUNDERSTORM WILL BE NEAR...
MALLORY AND DAVIDSON AROUND 805 PM CDT.
FISHER AROUND 810 PM CDT.
KEY WEST AND SHERACK AROUND 815 PM CDT.
ANGUS AROUND 825 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM...ON THE LOWEST FLOOR OF
A BUILDING.
&&
LAT...LON 4811 9665 4771 9671 4771 9737 4791 9738
TIME...MOT...LOC 0100Z 252DEG 33KT 4792 9697
HAIL...1.00IN
WIND...70MPH
$$
HOPPESThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 8:26 PM CDT | Flash Flood Warning | FGF | Polk | 6 hr |
| Jul 21, 8:43 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman, Polk | 46 min |
| Jul 21, 8:58 PM CDT | Tornado Warning | FGF | Pennington, Polk, Red Lake | 47 min |
| Jul 21, 9:08 PM CDT | Tornado Warning | FGF | Norman, Polk | 33 min |
| Jul 21, 9:15 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clay, Clearwater, Mahnomen, Marshall and 4 more | 60 min |
| Jul 21, 10:01 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard, Lake of the Woods, Mahnomen and 3 more | 59 min |
| Jul 21, 10:14 PM CDT | Special Weather Statement | FGF | Grant | 46 min |
| Jul 21, 10:32 PM CDT | Flash Flood Warning | FGF | Marshall, Pennington, Polk, Red Lake | 8 hr |
| Jul 21, 11:01 PM CDT | Special Weather Statement | FGF | Wadena | 29 min |
| Jul 21, 11:10 PM CDT | High Wind Warning | FGF | Mahnomen, Norman, Pennington, Polk, Red Lake | 5 hr |
| Jul 22, 12:08 AM CDT | Areal Flood Advisory | FGF | Beltrami, Lake of the Woods, Roseau | 7 hr |
| Jul 22, 6:28 AM CDT | River Flood Warning | FGF | Marshall | 42 hr |
| Jul 22, 6:28 AM CDT | River Flood Warning | FGF | Marshall | 3 days |
| Jul 21, 7:03 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 27 min |
| Jul 21, 7:26 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Eddy, Griggs, Nelson, Steele | 64 min |
| Jul 21, 7:30 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 60 min |
| Jul 21, 7:38 PM CDT | Tornado Warning | FGF | Eddy, Griggs, Nelson, Steele | 37 min |
| Jul 21, 8:09 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Grand Forks, Griggs, Nelson, Steele and 2 more | 66 min |
| Jul 21, 8:29 PM CDT | Tornado Warning | FGF | Grand Forks | 46 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2014Severe Thunderstorm Warnings in North Dakota, 2014Every severe thunderstorm warning in 2014
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.