Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 48, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 20, 2011, 5:30 AM CDT for Ramsey County, Walsh 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, 5:30 AM CDT (10:30 UTC)
- Expired
- Jul 20, 2011, 6:15 AM CDT
- In force
- 45 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Ramsey County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 110 km from the middle of the area, began a volume at 10:30 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 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, 10.5 hours before the alert went out and 257 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.
097 WFUS53 KFGF 201030 TORFGF NDC071-099-201115- /O.NEW.KFGF.TO.W.0048.110720T1030Z-110720T1115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 530 AM CDT WED JUL 20 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA... SOUTHWESTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 615 AM CDT * AT 525 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 4 MILES WEST OF LAWTON...OR 23 MILES NORTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 25 MPH. * THE TORNADIC STORM WILL BE NEAR... LAWTON AND BROCKET AROUND 535 AM CDT. ADAMS AROUND 605 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 4845 9794 4820 9794 4820 9853 4837 9855 TIME...MOT...LOC 1030Z 266DEG 22KT 4829 9839 $$ GROCHOCINSKI
2 follow-up statements
112 WWUS53 KFGF 201046 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 546 AM CDT WED JUL 20 2011 NDC071-099-201115- /O.CON.KFGF.TO.W.0048.000000T0000Z-110720T1115Z/ RAMSEY ND-WALSH ND- 546 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WALSH AND EAST CENTRAL RAMSEY COUNTIES IN NORTHEAST NORTH DAKOTA UNTIL 615 AM CDT... AT 543 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES EAST OF LAWTON...OR 30 MILES NORTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 25 MPH. THE TORNADIC STORM WILL BE NEAR... ADAMS AROUND 605 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4820 9839 4839 9842 4845 9794 4820 9794 TIME...MOT...LOC 1046Z 266DEG 22KT 4829 9824 $$ GROCHOCINSKI
127 WWUS53 KFGF 201050 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 550 AM CDT WED JUL 20 2011 NDC071-099-201115- /O.CON.KFGF.TO.W.0048.000000T0000Z-110720T1115Z/ RAMSEY ND-WALSH ND- 550 AM CDT WED JUL 20 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WALSH AND EXTREME EAST CENTRAL RAMSEY COUNTIES IN NORTHEAST NORTH DAKOTA UNTIL 615 AM CDT... AT 548 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES EAST OF LAWTON...OR 32 MILES EAST OF DEVILS LAKE...MOVING TO THE EAST AT 25 MPH. THE PARENT SEVERE THUNDERSTORM IS LIKELY PRODUCING LARGE HAIL UP TO THE SIZE OF PING PONGS. THE TORNADIC STORM WILL BE NEAR... ADAMS AROUND 605 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 4820 9832 4840 9837 4845 9794 4820 9794 TIME...MOT...LOC 1049Z 266DEG 22KT 4829 9821 $$ 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, 5:41 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.