Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 49, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 20, 2011, 6:07 AM CDT for Grand Forks County, Nelson County, Walsh County, North Dakota. It was in force for 38 min. 4 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 20, 2011, 6:07 AM CDT (11:07 UTC)
- Expired
- Jul 20, 2011, 6:45 AM CDT
- In force
- 38 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Grand Forks County, ND, Nelson County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 85 km from the middle of the area, began a volume at 11:07 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 20, 6:20 AM CDT | TSTM WND DMG | 2 S Fordville, ND | TREE FELL ON PICKUP TRUCK WITH NO REPORTED INJURIES. TIME ESTIMATED USING RADAR IMAGERY. |
| Jul 20, 6:20 AM CDT | TSTM WND DMG | Fordville, ND | LARGE TREES DOWN IN FORDVILLE. APPROXIMATE TIME LINKED TO RADAR. |
| Jul 20, 6:35 AM CDT | TSTM WND DMG | Forest River, ND | LARGE TREES DOWN IN CITY OF FOREST RIVER. TIME LINKED TO RADAR IMAGES. |
| Jul 20, 6:40 AM CDT | TSTM WND DMG | 4 E Pisek, ND | POWER POLES DOWN AT INTERSECTION OF ND 18 AND WALSH 15. TIME APPROXIMATED USING RADAR IMAGERY. |
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 20, 5:25 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 11.1 hours before the alert went out and 283 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
- 5088 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.9
The text
As transmitted, in the capitals the NWS used until 2016.
249 WFUS53 KFGF 201107 TORFGF NDC035-063-099-201145- /O.NEW.KFGF.TO.W.0049.110720T1107Z-110720T1145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 607 AM CDT WED JUL 20 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA... NORTHEASTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA... CENTRAL WALSH COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 645 AM CDT * AT 603 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 5 MILES SOUTHWEST OF LANKIN...OR 30 MILES WEST OF GRAFTON...MOVING TO THE EAST AT 35 MPH. * THE TORNADIC STORM WILL BE NEAR... FORDVILLE AROUND 620 AM CDT. PISEK...ORR AND CONWAY AROUND 625 AM CDT. INKSTER AROUND 630 AM CDT. VESELEYVILLE AROUND 635 AM CDT. THE PARENT SEVERE THUNDERSTORM IS LIKELY PRODUCING LARGE HAIL UP TO THE SIZE OF PING PONGS. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM INCLUDE VOSS AND MINTO. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4837 9732 4803 9734 4816 9816 4838 9813 TIME...MOT...LOC 1106Z 272DEG 34KT 4826 9796 $$ GROCHOCINSKI
3 follow-up statements
617 WWUS53 KFGF 201124 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 624 AM CDT WED JUL 20 2011 NDC035-063-099-201145- /O.CON.KFGF.TO.W.0049.000000T0000Z-110720T1145Z/ GRAND FORKS ND-NELSON ND-WALSH ND- 624 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL WALSH... NORTHEASTERN NELSON AND NORTHWESTERN GRAND FORKS COUNTIES IN NORTHEAST NORTH DAKOTA UNTIL 645 AM CDT... AT 621 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES NORTHEAST OF FORDVILLE...OR 20 MILES SOUTHWEST OF GRAFTON...MOVING TO THE EAST AT 35 MPH. THE TORNADIC STORM WILL BE NEAR... INKSTER AROUND 630 AM CDT. VESELEYVILLE AROUND 635 AM CDT. VOSS...JOHNSTOWN AND GILBY AROUND 640 AM CDT. MINTO AND ARDOCH AROUND 645 AM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM INCLUDE FOREST RIVER. THE PARENT STORM IS LIKELY PRODUCING LARGE HAIL UP TO THE SIZE OF QUARTERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4838 9804 4837 9732 4803 9734 4814 9804 TIME...MOT...LOC 1123Z 272DEG 34KT 4824 9772 $$ GROCHOCINSKI
716 WWUS53 KFGF 201132 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 632 AM CDT WED JUL 20 2011 NDC063-201142- /O.CAN.KFGF.TO.W.0049.000000T0000Z-110720T1145Z/ NELSON ND- 632 AM CDT WED JUL 20 2011 ...THE TORNADO WARNING FOR NORTHEASTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS THE WARNED AREA. LAT...LON 4838 9784 4837 9732 4803 9734 4811 9784 TIME...MOT...LOC 1132Z 272DEG 34KT 4822 9759 $$ NDC035-099-201145- /O.CON.KFGF.TO.W.0049.000000T0000Z-110720T1145Z/ GRAND FORKS ND-WALSH ND- 632 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL WALSH AND NORTHWESTERN GRAND FORKS COUNTIES IN NORTHEAST NORTH DAKOTA UNTIL 645 AM CDT... AT 630 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES EAST OF CONWAY...OR 16 MILES SOUTHWEST OF GRAFTON...MOVING TO THE EAST AT 35 MPH. THE TORNADIC STORM WILL BE NEAR... VOSS...JOHNSTOWN AND GILBY AROUND 640 AM CDT. MINTO AND ARDOCH AROUND 645 AM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM INCLUDE FOREST RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4838 9784 4837 9732 4803 9734 4811 9784 TIME...MOT...LOC 1132Z 272DEG 34KT 4822 9759 $$ GROCHOCINSKI
146 WWUS53 KFGF 201142 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 642 AM CDT WED JUL 20 2011 NDC035-099-201152- /O.EXP.KFGF.TO.W.0049.000000T0000Z-110720T1145Z/ GRAND FORKS ND-WALSH ND- 642 AM CDT WED JUL 20 2011 ...THE TORNADO WARNING FOR SOUTH CENTRAL WALSH AND NORTH CENTRAL GRAND FORKS COUNTIES IN NORTHEAST NORTH DAKOTA WILL EXPIRE AT 645 AM CDT... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. LARGE HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4838 9784 4837 9732 4803 9734 4811 9784 TIME...MOT...LOC 1142Z 272DEG 34KT 4820 9745 $$ GROCHOCINSKI
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 9:16 PM CDT | River Flood Warning | FGF | Cass, Richland | 9 days |
| Jul 20, 4:08 AM CDT | Severe Thunderstorm Warning | FGF | Walsh | 67 min |
| Jul 20, 4:11 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey, Towner | 64 min |
| Jul 20, 5:00 AM CDT | Tornado Warning | FGF | Ramsey | 45 min |
| Jul 20, 5:30 AM CDT | Tornado Warning | FGF | Ramsey, Walsh | 45 min |
| Jul 20, 5:41 AM CDT | Severe Thunderstorm Warning | FGF | Pembina, Walsh | 34 min |
| Jul 20, 5:53 AM CDT | Areal Flood Advisory | FGF | Benson, Cavalier, Ramsey, Towner, Walsh | 9 hr |
| Jul 20, 6:28 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy, Ramsey, Towner | 62 min |
| Jul 20, 6:40 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Walsh | 50 min |
| Jul 20, 7:21 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Cavalier, Ramsey, Towner, Walsh | 54 min |
| Jul 20, 8:08 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Nelson, Pembina, Ramsey, Walsh | 67 min |
| Jul 20, 8:59 AM CDT | Areal Flood Advisory | FGF | Cavalier, Pembina, Walsh | 6 hr |
| Jul 20, 10:49 AM CDT | River Flood Watch | FGF | Grand Forks | 47 hr |
| Jul 20, 10:49 AM CDT | River Flood Watch | FGF | Grand Forks, Walsh | 47 hr |
Nearby
Tornado Warnings in North Dakota, 2011Every tornado warning in 2011Tornadoes in 2011
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.