Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 39, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 17, 2011, 12:33 PM CDT for Eddy County, North Dakota. It was in force for 42 min. 7 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 17, 2011, 12:33 PM CDT (17:33 UTC)
- Expired
- Jul 17, 2011, 1:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Eddy County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 127 km from the middle of the area, began a volume at 17:36 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 17, 12:55 PM CDT | HAIL 1 | 1 W New Rockford, ND | |
| Jul 17, 1:05 PM CDT | HAIL 0.75 | Sheyenne, ND | |
| Jul 17, 1:06 PM CDT | HAIL 1.75 | New Rockford, ND | |
| Jul 17, 1:07 PM CDT | TSTM WND DMG | 4 S New Rockford, ND | 2 POWER POLES SNAPPED ALONG US HIGHWAY 281 |
| Jul 17, 1:07 PM CDT | TSTM WND DMG | New Rockford, ND | HIGH WINDS IN TOWN BLEW DOWN TREES WITH SOME STREET FLOODING DUE TO THE HEAVY RAIN. |
| Jul 17, 1:08 PM CDT | TORNADO 1 | 4 Sse New Rockford, ND | CLEAR DAMAGE PATH FROM HIGHWAY 281 4S NEW ROCKFORD THROUGH SHELTER-BELT EAST OF 281 |
| Jul 17, 1:09 PM CDT | TORNADO 1 | 4 S New Rockford, ND | TORNADO TRACKED FOR AT LEAST A MILE TO AROUND 5 MILES SSE OF NEW ROCKFORD BY 112 PM CDT. TORNADO BROKE DOWN TWO POWER POLES ALONG THE WEST SIDE OF HWY 281 AND SEVERELY DAMAGED SEVERAL TREES IN A SHELTER BELT EAST OF HWY 281. MAXIMUM WIDTH ESTIMATED TO 150 YARD |
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 17, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 5.6 hours before the alert went out and 166 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
- 4227 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 37.4
The text
As transmitted, in the capitals the NWS used until 2016.
878
WFUS53 KFGF 171733
TORFGF
NDC027-171815-
/O.NEW.KFGF.TO.W.0039.110717T1733Z-110717T1815Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1233 PM CDT SUN JUL 17 2011
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* TORNADO WARNING FOR...
EDDY COUNTY IN NORTHEAST NORTH DAKOTA...
* UNTIL 115 PM CDT
* AT 1232 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
LOCATED 3 MILES SOUTHWEST OF BREMEN...OR 36 MILES SOUTHWEST OF
DEVILS LAKE...MOVING TO THE EAST AT 40 MPH.
* THE TORNADIC STORM WILL BE NEAR...
SHEYENNE AROUND 1250 PM CDT.
NEW ROCKFORD AROUND 1255 PM CDT.
BRANTFORD AROUND 110 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
&&
LAT...LON 4785 9860 4758 9863 4759 9927 4766 9927
4767 9930 4785 9931
TIME...MOT...LOC 1733Z 280DEG 33KT 4773 9940
$$
JK1 follow-up statement
354
WWUS53 KFGF 171804
SVSFGF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
104 PM CDT SUN JUL 17 2011
NDC027-171815-
/O.CON.KFGF.TO.W.0039.000000T0000Z-110717T1815Z/
EDDY ND-
104 PM CDT SUN JUL 17 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EDDY COUNTY IN NORTHEAST
NORTH DAKOTA UNTIL 115 PM CDT...
AT 1259 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR NEW
ROCKFORD...OR 34 MILES SOUTH OF DEVILS LAKE...MOVING TO THE SOUTHEAST
AT 30 MPH.
IN ADDITION...QUARTER SIZED HAIL WAS REPORTED ONE MILE WEST OF NEW
ROCKFORD AT 1255 PM WITH THIS STORM.
THE TORNADIC STORM WILL BE NEAR...
BRANTFORD AROUND 115 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
&&
LAT...LON 4785 9860 4758 9863 4759 9927 4766 9927
4767 9930 4785 9931
TIME...MOT...LOC 1803Z 294DEG 27KT 4765 9911
$$
JKThe 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, 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, 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.