Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 33, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 16, 2011, 7:10 PM CDT for Griggs County, North Dakota. It was in force for 50 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
- Jul 16, 2011, 7:10 PM CDT (00:10 UTC)
- Expired
- Jul 16, 2011, 8:00 PM CDT
- In force
- 50 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Griggs County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 68 km from the middle of the area, began a volume at 00:12 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 16, 7:10 PM CDT | TORNADO | 15 Se Sutton, ND | PERSON 5 S OF SUTTON ND SEES A TORNADO 10 MILES TO HIS EAST ... RELAYED VIA WFO BISMARCK |
| Jul 16, 7:14 PM CDT | FUNNEL CLOUD | 6 W Hannaford, ND | PUBLIC REPORT OF FUNNEL CLOUD RECEIVED VIA FACEBOOK PAGE. LOCATION ORIGINALY IDENTIFIED AS WEST OF COOPERSTOWN BUT WAS LIKELY WEST OF HANNAFORD. |
| Jul 16, 7:30 PM CDT | TORNADO | 6 Nw Hannaford, ND | TORNADO TOUCHED DOWN AND TORE THE ROOF OFF OF A SHED |
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 16, 4:57 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 hours before the alert went out and 201 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
- 4274 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1100 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 13.9
The text
As transmitted, in the capitals the NWS used until 2016.
917 WFUS53 KFGF 170010 TORFGF NDC039-170100- /O.NEW.KFGF.TO.W.0033.110717T0010Z-110717T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 710 PM CDT SAT JUL 16 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 800 PM CDT * AT 707 PM CDT...STORM SPOTTERS OBSERVED AND NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO. THE DANGEROUS STORM WAS LOCATED 4 MILES SOUTH OF REVERE...OR 30 MILES NORTHWEST OF VALLEY RADAR SHOWED THE TORNADO WAS MOVING TO THE NORTHEAST AT 15 MPH. * THE TORNADIC STORM WILL BE NEAR... REVERE AROUND 720 PM CDT. WALUM AROUND 735 PM CDT. HANNAFORD AROUND 745 PM CDT. COOPERSTOWN AROUND 800 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4749 9806 4725 9797 4724 9844 4737 9848 TIME...MOT...LOC 0009Z 240DEG 8KT 4730 9832 $$ JK
3 follow-up statements
832 WWUS53 KFGF 170033 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 733 PM CDT SAT JUL 16 2011 NDC039-170100- /O.CON.KFGF.TO.W.0033.000000T0000Z-110717T0100Z/ GRIGGS ND- 733 PM CDT SAT JUL 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA UNTIL 800 PM CDT... AT 730 PM CDT...STORM SPOTTERS OBSERVED AND NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO. THE DANGEROUS STORM WAS LOCATED NEAR HANNAFORD...OR 30 MILES NORTH OF VALLEY CITY...MOVING TO THE NORTHEAST AT 15 MPH. THE TORNADIC STORM WILL BE NEAR... COOPERSTOWN AROUND 800 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4749 9806 4725 9797 4724 9844 4737 9848 TIME...MOT...LOC 0033Z 236DEG 8KT 4734 9820 $$ DR/JK
041 WWUS53 KFGF 170048 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 748 PM CDT SAT JUL 16 2011 NDC039-170100- /O.CON.KFGF.TO.W.0033.000000T0000Z-110717T0100Z/ GRIGGS ND- 748 PM CDT SAT JUL 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA UNTIL 800 PM CDT... AT 744 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES NORTH OF HANNAFORD...OR 33 MILES NORTH OF VALLEY CITY...MOVING TO THE NORTHEAST AT 15 MPH. THE TORNADIC STORM WILL BE NEAR... COOPERSTOWN AROUND 800 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4749 9806 4725 9797 4724 9844 4737 9848 TIME...MOT...LOC 0048Z 205DEG 6KT 4739 9818 $$ DR/JK
393 WWUS53 KFGF 170058 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 758 PM CDT SAT JUL 16 2011 NDC039-170108- /O.EXP.KFGF.TO.W.0033.000000T0000Z-110717T0100Z/ GRIGGS ND- 758 PM CDT SAT JUL 16 2011 ...THE TORNADO WARNING FOR SOUTHERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA WILL EXPIRE AT 800 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 4749 9806 4725 9797 4724 9844 4737 9848 TIME...MOT...LOC 0058Z 205DEG 6KT 4741 9817 $$ DTR
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:53 PM CDT | Tornado Warning | FGF | Benson, Ramsey | 52 min |
| Jul 16, 8:36 PM CDT | Tornado Warning | FGF | Benson, Ramsey | 39 min |
| Jul 16, 9:24 PM CDT | Tornado Warning | FGF | Benson, Nelson, Ramsey | 51 min |
| Jul 16, 10:02 PM CDT | Flash Flood Warning | FGF | Nelson, Ramsey | 10 hr |
| Jul 16, 10:41 PM CDT | Areal Flood Advisory | FGF | Pembina, Walsh | 8 hr |
| Jul 16, 11:08 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 52 min |
| Jul 17, 11:45 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 60 min |
| Jul 17, 12:33 PM CDT | Tornado Warning | FGF | Eddy | 42 min |
| Jul 17, 1:11 PM CDT | Tornado Warning | FGF | Eddy | 49 min |
| Jul 17, 2:24 PM CDT | Tornado Warning | FGF | Barnes, Griggs | 36 min |
| Jul 17, 2:57 PM CDT | Tornado Warning | FGF | Barnes, Griggs | 48 min |
| Jul 17, 3:34 PM CDT | Tornado Warning | FGF | Barnes, Griggs, Steele | 41 min |
| Jul 17, 4:12 PM CDT | Tornado Warning | FGF | Barnes, Cass | 63 min |
| Jul 17, 5:13 PM CDT | Tornado Warning | FGF | Cass | 45 min |
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.