Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 20, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jun 17, 2011, 6:27 PM CDT for Sargent County, North Dakota. It was in force for 33 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
- Jun 17, 2011, 6:27 PM CDT (23:27 UTC)
- Expired
- Jun 17, 2011, 7:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Sargent County, ND
The radar
The Aberdeen radar (KABR), 103 km from the middle of the area, began a volume at 23:30 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 |
|---|---|---|---|
| Jun 17, 5:34 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.5 hours before the alert went out and 149 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
- 35 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 665 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
212
WFUS53 KFGF 172327
TORFGF
NDC081-180000-
/O.NEW.KFGF.TO.W.0020.110617T2327Z-110618T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
627 PM CDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...
* UNTIL 700 PM CDT
* AT 623 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
LOCATED 5 MILES SOUTHWEST OF CAYUGA...OR 43 MILES SOUTHWEST OF
WAHPETON...MOVING TO THE NORTHEAST AT 15 MPH.
* THE TORNADIC STORM WILL BE NEAR...
CAYUGA AROUND 640 PM CDT.
GENESEO AROUND 650 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 4594 9739 4601 9755 4618 9741 4614 9726
4601 9726
TIME...MOT...LOC 2327Z 231DEG 15KT 4602 9741
$$
SPEICHER1 follow-up statement
321
WWUS53 KFGF 172356
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
656 PM CDT FRI JUN 17 2011
NDC081-180005-
/O.EXP.KFGF.TO.W.0020.000000T0000Z-110618T0000Z/
SARGENT ND-
656 PM CDT FRI JUN 17 2011
...THE TORNADO WARNING FOR SOUTHEASTERN SARGENT COUNTY IN SOUTHEAST
NORTH DAKOTA WILL EXPIRE AT 700 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 1 AM CDT.
LAT...LON 4594 9739 4601 9755 4618 9741 4614 9726
4601 9726
TIME...MOT...LOC 2355Z 231DEG 15KT 4609 9728
$$
SPEICHERThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 5:49 PM CDT | Tornado Warning | FGF | Sargent | 41 min |
| Jun 17, 5:55 PM CDT | Tornado Warning | FGF | Ransom, Sargent | 50 min |
| Jun 17, 6:14 PM CDT | Tornado Warning | FGF | Barnes, Ransom | 34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.