Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 38, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 16, 2011, 9:24 PM CDT for Benson County, Nelson County, Ramsey County, North Dakota. It was in force for 51 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 16, 2011, 9:24 PM CDT (02:24 UTC)
- Expired
- Jul 16, 2011, 10:15 PM CDT
- In force
- 51 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Benson County, ND, Nelson County, ND, Ramsey County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 91 km from the middle of the area, began a volume at 02:25 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, 9:48 PM CDT | TORNADO | 5 W Stump Lake, 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 16, 4:57 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.4 hours before the alert went out and 223 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.
898 WFUS53 KFGF 170224 TORFGF NDC005-063-071-170315- /O.NEW.KFGF.TO.W.0038.110717T0224Z-110717T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 924 PM CDT SAT JUL 16 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... EXTREME SOUTHEASTERN BENSON COUNTY IN NORTHEAST NORTH DAKOTA... CENTRAL NELSON COUNTY IN NORTHEAST NORTH DAKOTA... SOUTH CENTRAL RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 1015 PM CDT * AT 920 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 8 MILES NORTHEAST OF WARWICK...OR 16 MILES SOUTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 20 MPH. * THE TORNADIC STORM WILL BE NEAR... DOYON AROUND 930 PM CDT. STUMP LAKE AROUND 945 PM CDT. LAKOTA AROUND 955 PM CDT. MICHIGAN AND MAPES AROUND 1015 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 4809 9808 4785 9806 4786 9873 4804 9874 TIME...MOT...LOC 0224Z 268DEG 18KT 4796 9860 $$ DTR/JK
2 follow-up statements
898 WWUS53 KFGF 170251 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 951 PM CDT SAT JUL 16 2011 NDC005-063-071-170315- /O.CON.KFGF.TO.W.0038.000000T0000Z-110717T0315Z/ BENSON ND-NELSON ND-RAMSEY ND- 951 PM CDT SAT JUL 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL RAMSEY... CENTRAL NELSON AND EXTREME SOUTHEASTERN BENSON COUNTIES IN NORTHEAST NORTH DAKOTA UNTIL 1015 PM CDT... AT 949 PM CDT...STORM SPOTTERS OBSERVED AND NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO. THE DANGEROUS STORM WAS LOCATED 3 MILES NORTHWEST OF STUMP LAKE...OR 22 MILES SOUTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 15 MPH. A CERTIFIED STORM SPOTTER REPORTS A TOUCHDOWN JUST NORTHWEST OF STUMP LAKE. THE TORNADIC STORM WILL BE NEAR... LAKOTA AROUND 1005 PM CDT. MICHIGAN AND MAPES AROUND 1015 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4809 9808 4785 9806 4786 9873 4804 9874 TIME...MOT...LOC 0251Z 272DEG 13KT 4796 9844 $$ DTR
684 WWUS53 KFGF 170316 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1016 PM CDT SAT JUL 16 2011 NDC005-063-071-170327- /O.EXP.KFGF.TO.W.0038.000000T0000Z-110717T0315Z/ BENSON ND-NELSON ND-RAMSEY ND- 1016 PM CDT SAT JUL 16 2011 ...THE TORNADO WARNING FOR SOUTH CENTRAL RAMSEY...CENTRAL NELSON AND EXTREME SOUTHEASTERN BENSON COUNTIES IN NORTHEAST NORTH DAKOTA HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 4809 9808 4785 9806 4786 9873 4804 9874 TIME...MOT...LOC 0251Z 272DEG 13KT 4798 9839 $$ DTR
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:10 PM CDT | Tornado Warning | FGF | Griggs | 50 min |
| 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, 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.