Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 12, NWS Grand Forks, ND

May 30, 2011Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at May 30, 2011, 9:43 PM CDT for Polk County, Minnesota. It was in force for 47 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: May 30, 2011, 9:43 PM CDT (02:43 UTC)
Expired: May 30, 2011, 10:30 PM CDT
In force: 47 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 62 km from the middle of the area, began a volume at 02:42 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, 10:00 PM CDT	TSTM WND GST 68	Fisher, MN

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, 2.7 hours before the alert went out and 264 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

296 
WFUS53 KFGF 310243
TORFGF
MNC119-310330-
/O.NEW.KFGF.TO.W.0012.110531T0243Z-110531T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
943 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...

* UNTIL 1030 PM CDT

* AT 938 PM CDT...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD NEAR
  FISHER...OR 16 MILES SOUTHEAST OF GRAND FORKS. A TORNADO MAY
  DEVELOP AT ANY TIME. RADAR SHOWED THE STORM WAS MOVING TO THE
  NORTHEAST AT 35 MPH.

* THE STORM WILL BE NEAR...
  KEY WEST AROUND 950 PM CDT.
  SHERACK AND EUCLID AROUND 1000 PM CDT.
  ANGUS AROUND 1010 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 4796 9651 4774 9664 4778 9697 4779 9696
      4780 9698 4817 9676 4816 9651
TIME...MOT...LOC 0243Z 206DEG 31KT 4785 9674

$$

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, 8:58 PM CDT	Tornado Warning	FGF	Polk	47 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, 9:48 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

Nearby

Tornado Warnings in Minnesota, 2011 Every tornado warning in 2011 Tornadoes 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.