Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 31, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 15, 2011, 4:18 AM CDT for Ransom County, Richland County, North Dakota. It was in force for 42 min. 1 report 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 15, 2011, 4:18 AM CDT (09:18 UTC)
- Expired
- Jul 15, 2011, 5:00 AM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Ransom County, ND, Richland County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 120 km from the middle of the area, began a volume at 09:18 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 15, 4:40 AM CDT | HAIL 1.25 | 5 Wnw Galchutt, ND |
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 15, 2:56 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 9.3 hours before the alert went out and 202 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
- 4277 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 4.1
- Supercell composite
- 19.7
The text
As transmitted, in the capitals the NWS used until 2016.
846 WFUS53 KFGF 150918 TORFGF NDC073-077-151000- /O.NEW.KFGF.TO.W.0031.110715T0918Z-110715T1000Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 418 AM CDT FRI JUL 15 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA... NORTHWESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 500 AM CDT * AT 414 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 2 MILES SOUTHWEST OF MCLEOD...OR 36 MILES WEST OF WAHPETON...MOVING TO THE EAST AT 25 MPH. * THE TORNADIC STORM WILL BE NEAR... WALCOTT AND COLFAX AROUND 500 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 4663 9686 4630 9683 4629 9743 4647 9746 TIME...MOT...LOC 0917Z 266DEG 20KT 4638 9732 $$ GUST
2 follow-up statements
739 WWUS53 KFGF 150943 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 443 AM CDT FRI JUL 15 2011 NDC073-150951- /O.CAN.KFGF.TO.W.0031.000000T0000Z-110715T1000Z/ RANSOM ND- 443 AM CDT FRI JUL 15 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4652 9728 4663 9686 4630 9685 4629 9728 TIME...MOT...LOC 0941Z 266DEG 20KT 4639 9713 $$ NDC077-151000- /O.CON.KFGF.TO.W.0031.000000T0000Z-110715T1000Z/ RICHLAND ND- 443 AM CDT FRI JUL 15 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA UNTIL 500 AM CDT... AT 437 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES EAST OF MCLEOD...OR 27 MILES WEST OF WAHPETON...MOVING TO THE EAST AT 25 MPH. THE TORNADIC STORM WILL BE NEAR... WALCOTT AND COLFAX AROUND 500 AM CDT AND PASS NORTH OF WYNDMERE AND BARNEY THROUGH 500 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 4652 9728 4663 9686 4630 9685 4629 9728 TIME...MOT...LOC 0941Z 266DEG 20KT 4639 9713 $$ GUST
662 WWUS53 KFGF 151002 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 502 AM CDT FRI JUL 15 2011 NDC077-151012- /O.EXP.KFGF.TO.W.0031.000000T0000Z-110715T1000Z/ RICHLAND ND- 502 AM CDT FRI JUL 15 2011 ...THE TORNADO WARNING FOR NORTHWESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA HAS EXPIRED... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. LAT...LON 4652 9728 4663 9686 4630 9685 4629 9728 TIME...MOT...LOC 0943Z 266DEG 20KT 4639 9711 $$ GUST
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 2:11 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 64 min |
| Jul 15, 2:41 AM CDT | Severe Thunderstorm Warning | FGF | Barnes | 64 min |
| Jul 15, 3:25 AM CDT | Tornado Warning | FGF | Barnes | 50 min |
| Jul 15, 3:53 AM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland | 52 min |
| Jul 15, 4:03 AM CDT | Excessive Heat Watch | FGF | Barnes, Benson, Cass, Eddy, Grand Forks, Griggs and 9 more | 24 hr |
| Jul 15, 4:04 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 56 min |
| Jul 15, 4:50 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 55 min |
| Jul 15, 5:00 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 43 min |
| Jul 15, 5:11 AM CDT | Areal Flood Advisory | FGF | Barnes | 9 hr |
| Jul 15, 5:12 AM CDT | Tornado Warning | FGF | Richland | 39 min |
| Jul 15, 5:47 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 58 min |
| Jul 15, 3:15 PM CDT | Excessive Heat Warning | FGF | Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 5 more | 5 days |
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.