Alert archive / Minnesota / Tornado Warnings in 2011
Tornado Warning 9, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at May 30, 2011, 8:58 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 47 min. 2 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
- May 30, 2011, 8:58 PM CDT (01:58 UTC)
- Expired
- May 30, 2011, 9:45 PM CDT
- In force
- 47 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
Counties Polk County, MN, Grand Forks County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 53 km from the middle of the area, began a volume at 02:01 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 |
|---|---|---|---|
| May 30, 9:30 PM CDT | FUNNEL CLOUD | 6 S Grand Forks, ND | ROTATION SPOTTED 6 MILES SOUTH OF GRAND FORKS |
| May 30, 9:32 PM CDT | HAIL 0.75 | Grand Forks, ND | PENNY-SIZED HAIL IN SOUTH GRAND FORKS |
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 |
|---|---|---|---|
| May 30, 3:52 PM CDT | Tornado Watch | SPC | 7 hr |
| May 30, 8:43 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 2.0 hours before the alert went out and 288 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
- 4 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 443 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 657 m²/s²
- 0-3 km storm-relative helicity
- 727 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
890 WFUS53 KFGF 310158 TORFGF MNC119-NDC035-310245- /O.NEW.KFGF.TO.W.0009.110531T0158Z-110531T0245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 858 PM CDT MON MAY 30 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA... EASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 945 PM CDT * AT 856 PM CDT...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 4 MILES NORTHWEST OF THOMPSON...OR 8 MILES SOUTHWEST OF GRAND FORKS. A TORNADO MAY DEVELOP AT ANY TIME. RADAR SHOWED THE STORM WAS MOVING TO THE NORTHEAST AT 30 MPH. * THE STORM WILL BE NEAR... BYGLAND AROUND 905 PM CDT. GRAND FORKS AND MALLORY AROUND 910 PM CDT. EAST GRAND FORKS AROUND 915 PM CDT. MANVEL AROUND 925 PM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE STORM INCLUDE TABOR. FOR MOTORISTS ON INTERSTATE 29...THE STORM WILL BE BETWEEN...MILE MARKER 133 AROUND 900 PM CDT...AND MILE MARKER 144 AROUND 915 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 4815 9716 4815 9671 4770 9701 4771 9736 TIME...MOT...LOC 0158Z 207DEG 27KT 4783 9713 $$ HOPKINS
1 follow-up statement
499 WWUS53 KFGF 310214 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 914 PM CDT MON MAY 30 2011 MNC119-NDC035-310245- /O.CON.KFGF.TO.W.0009.000000T0000Z-110531T0245Z/ GRAND FORKS ND-POLK MN- 914 PM CDT MON MAY 30 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA...AND EASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA UNTIL 945 PM CDT... AT 910 PM CDT...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD OVER GRAND FORKS...MOVING TO THE NORTHEAST AT 30 MPH. THE DEVELOPING TORNADO WILL BE NEAR... MANVEL AROUND 925 PM CDT. TABOR AROUND 940 PM CDT. FOR MOTORISTS ON INTERSTATE 29...THE DEVELOPING TORNADO WILL BE BETWEEN...MILE MARKERS 141 AND 143 AROUND 915 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. && LAT...LON 4815 9716 4815 9671 4770 9701 4771 9736 TIME...MOT...LOC 0214Z 207DEG 27KT 4794 9705 $$ HOPKINS
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:47 PM CDT | Tornado Warning | FGF | Clay | 43 min |
| May 30, 9:06 PM CDT | Tornado Warning | FGF | Polk | 39 min |
| May 30, 9:12 PM CDT | Tornado Warning | FGF | Grant | 48 min |
| May 30, 9:22 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Norman | 38 min |
| May 30, 9:40 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 65 min |
| May 30, 9:43 PM CDT | Tornado Warning | FGF | Polk | 47 min |
| May 30, 9:48 PM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 27 min |
| May 30, 9:50 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 25 min |
| May 30, 10:12 PM CDT | Flash Flood Warning | FGF | Grant | 9 hr |
| May 30, 10:20 PM CDT | Areal Flood Advisory | FGF | Polk | 8 hr |
| May 30, 10:21 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Otter Tail and 2 more | 54 min |
| May 30, 10:33 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more | 57 min |
| May 30, 11:16 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 29 min |
| May 31, 3:44 AM CDT | Wind Advisory | FGF | Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 11 more | 19 hr |
| May 30, 7:42 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland, Sargent | 63 min |
| May 30, 8:21 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 24 min |
| May 30, 8:34 PM CDT | Tornado Warning | FGF | Richland | 26 min |
| May 31, 6:12 PM CDT | High Wind Warning | FGF | Barnes, Benson, Cavalier, Eddy, Griggs, Nelson and 4 more | 3 hr |
Nearby
Tornado Warnings in Minnesota, 2011Tornado 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.