Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 45, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 17, 2011, 5:13 PM CDT for Cass County, North Dakota. It was in force for 45 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 17, 2011, 5:13 PM CDT (22:13 UTC)
- Expired
- Jul 17, 2011, 5:58 PM CDT
- In force
- 45 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 72 km from the middle of the area, began a volume at 22:13 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, 5:24 PM CDT | FUNNEL CLOUD | 8 Nw Wheatland, ND | TWO SHORT LIVED FUNNELS THAT CAME ABOUT ONE THIRD OF THE WAY DOWN FROM THE CLOUD AND WENT RIGHT BACK UP |
| Jul 17, 5:25 PM CDT | HAIL 1.5 | Absaraka, ND | PUBLIC REPORT AND PHOTO RECEIVED VIA MEDIA FACEBOOK PAGE. HAIL OCCURRED BETWEEN 525 AND 530 PM CDT. |
| Jul 17, 5:35 PM CDT | FUNNEL CLOUD | 4 Wnw Wheatland, ND | WELL DEVELOPED WALL CLOUD WITH WEAK FUNNEL REPORTED BY PUBLIC TO MEDIA. |
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, 3:37 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.2 hours before the alert went out and 239 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
- 5718 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1259 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
630 WFUS53 KFGF 172213 TORFGF NDC017-172300- /O.NEW.KFGF.TO.W.0045.110717T2213Z-110717T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 513 PM CDT SUN JUL 17 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 600 PM CDT * AT 508 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED 2 MILES SOUTH OF AYR...OR 25 MILES EAST OF VALLEY CITY... MOVING TO THE SOUTHEAST AT 25 MPH. * THE TORNADIC STORM WILL BE NEAR... ABSARAKA AROUND 520 PM CDT. WHEATLAND AROUND 535 PM CDT. CASSELTON AROUND 545 PM CDT. MAPLETON AND DURBIN AROUND 600 PM CDT. FOR MOTORISTS ON INTERSTATE 94...THE TORNADIC STORM WILL BE BETWEEN...MILE MARKER 319 AROUND 525 PM CDT...AND MILE MARKER 340 AROUND 600 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 4685 9694 4667 9713 4697 9762 4710 9749 TIME...MOT...LOC 2213Z 306DEG 21KT 4700 9747 $$ VOELKER
2 follow-up statements
232 WWUS53 KFGF 172241 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 541 PM CDT SUN JUL 17 2011 NDC017-172300- /O.CON.KFGF.TO.W.0045.000000T0000Z-110717T2300Z/ CASS ND- 541 PM CDT SUN JUL 17 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA UNTIL 600 PM CDT... AT 536 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR WHEATLAND... OR 24 MILES WEST OF FARGO...MOVING TO THE SOUTHEAST AT 25 MPH. THE TORNADIC STORM WILL BE NEAR... CASSELTON AROUND 550 PM CDT. MAPLETON AND DURBIN AROUND 600 PM CDT. FOR MOTORISTS ON INTERSTATE 94...THE TORNADIC STORM WILL BE BETWEEN...MILE MARKER 326 AROUND 540 PM CDT...AND MILE MARKER 335 AROUND 555 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4685 9694 4667 9713 4697 9762 4710 9749 TIME...MOT...LOC 2241Z 306DEG 21KT 4690 9728 $$ VOELKER
149 WWUS53 KFGF 172258 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 558 PM CDT SUN JUL 17 2011 NDC017-172308- /O.CAN.KFGF.TO.W.0045.000000T0000Z-110717T2300Z/ CASS ND- 558 PM CDT SUN JUL 17 2011 ...THE TORNADO WARNING FOR CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER SEVERE. LAT...LON 4685 9694 4667 9713 4697 9762 4710 9749 TIME...MOT...LOC 2258Z 306DEG 21KT 4685 9716 $$ VOELKER
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, 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 |
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.