Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 47, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 20, 2011, 5:00 AM CDT for Ramsey County, North Dakota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2011, 5:00 AM CDT (10:00 UTC)
- Expired
- Jul 20, 2011, 5:45 AM CDT
- In force
- 45 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Ramsey County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 126 km from the middle of the area, began a volume at 10:02 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.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 10.0 hours before the alert went out and 229 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.
299 WFUS53 KFGF 201000 TORFGF NDC071-201045- /O.NEW.KFGF.TO.W.0047.110720T1000Z-110720T1045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 500 AM CDT WED JUL 20 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... CENTRAL RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 545 AM CDT * AT 457 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 3 MILES EAST OF WEBSTER...OR 13 MILES NORTH OF DEVILS LAKE...MOVING TO THE EAST AT 20 MPH. * THE TORNADIC STORM WILL BE NEAR... SOUTHAM AROUND 540 AM CDT. LAWTON AROUND 545 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4831 9832 4810 9853 4823 9897 4840 9887 TIME...MOT...LOC 1000Z 292DEG 17KT 4829 9880 $$ TG
3 follow-up statements
662
WWUS53 KFGF 201010
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
510 AM CDT WED JUL 20 2011
NDC071-201045-
/O.CON.KFGF.TO.W.0047.000000T0000Z-110720T1045Z/
RAMSEY ND-
510 AM CDT WED JUL 20 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL RAMSEY COUNTY IN
NORTHEAST NORTH DAKOTA UNTIL 545 AM CDT...
AT 507 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES EAST OF
WEBSTER...OR 14 MILES NORTHEAST OF DEVILS LAKE...MOVING TO THE EAST
AT 30 MPH.
THIS STORM IS ALSO CAPABLE OF PRODUCING QUARTER SIZE HAIL.
THE TORNADIC STORM WILL BE NEAR...
SOUTHAM AROUND 525 AM CDT.
LAWTON AROUND 540 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.
&&
LAT...LON 4818 9880 4827 9881 4839 9883 4831 9832
4810 9853
TIME...MOT...LOC 1009Z 282DEG 24KT 4828 9869
$$
TG051 WWUS53 KFGF 201018 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 518 AM CDT WED JUL 20 2011 NDC071-201045- /O.CON.KFGF.TO.W.0047.000000T0000Z-110720T1045Z/ RAMSEY ND- 518 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA UNTIL 545 AM CDT... AT 516 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES NORTHWEST OF SOUTHAM...OR 16 MILES NORTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 30 MPH. THE TORNADIC STORM WILL BE NEAR... SOUTHAM AROUND 525 AM CDT. LAWTON AROUND 540 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4815 9871 4837 9871 4831 9832 4810 9853 TIME...MOT...LOC 1018Z 282DEG 24KT 4826 9860 $$ GROCHOCINSKI
405 WWUS53 KFGF 201027 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 527 AM CDT WED JUL 20 2011 NDC071-201045- /O.CON.KFGF.TO.W.0047.000000T0000Z-110720T1045Z/ RAMSEY ND- 527 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA UNTIL 545 AM CDT... AT 525 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES NORTH OF SOUTHAM...OR 18 MILES NORTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 30 MPH. THE TORNADIC STORM WILL BE NEAR... LAWTON AROUND 540 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4812 9860 4835 9859 4831 9832 4810 9853 TIME...MOT...LOC 1027Z 282DEG 24KT 4824 9851 $$ 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, 5:30 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, 6:07 AM CDT | Tornado Warning | FGF | Grand Forks, Nelson, Walsh | 38 min |
| 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.