Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 10, NWS Grand Forks, ND

May 30, 2011Polk County, Minnesota; Grand Forks County, Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at May 30, 2011, 9:06 PM CDT for Polk County, Minnesota; Grand Forks County, Traill County, North Dakota. It was in force for 39 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, 9:06 PM CDT (02:06 UTC)
Expired
May 30, 2011, 9:45 PM CDT
In force
39 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon

Counties Polk County, MN, Grand Forks County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 34 km from the middle of the area, began a volume at 02:05 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

TimeReportWhereRemark
May 30, 9:48 PM CDTTSTM WND GST 612 W Eldred, MNELDRED NDAWN

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.

IssuedProductOfficeLasted
May 30, 3:52 PM CDTTornado WatchSPC7 hr
May 30, 8:43 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.1 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.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2011-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2011-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 657 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

846 
WFUS53 KFGF 310206
TORFGF
MNC119-NDC035-097-310245-
/O.NEW.KFGF.TO.W.0010.110531T0206Z-110531T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
906 PM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTHEASTERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 945 PM CDT

* AT 905 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED OVER BUXTON...OR 22 MILES SOUTH OF GRAND FORKS...MOVING TO
  THE NORTHEAST AT 30 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  REYNOLDS AROUND 915 PM CDT.
  BYGLAND AROUND 935 PM CDT.
  FISHER AROUND 940 PM CDT.

FOR MOTORISTS ON INTERSTATE 29...THE TORNADIC STORM WILL BE
BETWEEN...MILE MARKER 116 AROUND 905 PM CDT...AND MILE MARKER 127
AROUND 920 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 4785 9701 4785 9663 4754 9695 4755 9728
TIME...MOT...LOC 0206Z 206DEG 27KT 4761 9710

$$

HOPKINS
1 follow-up statement
016 
WWUS53 KFGF 310225
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
925 PM CDT MON MAY 30 2011

MNC119-NDC035-097-310245-
/O.CON.KFGF.TO.W.0010.000000T0000Z-110531T0245Z/
GRAND FORKS ND-TRAILL ND-POLK MN-
925 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL POLK COUNTY
IN NORTHWEST MINNESOTA...AND SOUTHEASTERN GRAND FORKS COUNTY IN
NORTHEAST NORTH DAKOTA...AND NORTHEASTERN TRAILL COUNTY IN SOUTHEAST
NORTH DAKOTA UNTIL 945 PM CDT...

AT 924 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES NORTHEAST
OF REYNOLDS...OR 14 MILES SOUTH OF GRAND FORKS...MOVING TO THE
NORTHEAST AT 30 MPH.

THE TORNADIC STORM WILL BE NEAR...
  FISHER AND BYGLAND AROUND 940 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 4785 9701 4785 9663 4754 9695 4755 9728
TIME...MOT...LOC 0225Z 206DEG 27KT 4772 9700

$$

HOPKINS

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 8:47 PM CDTTornado WarningFGFClay43 min
May 30, 8:58 PM CDTTornado WarningFGFPolk47 min
May 30, 9:12 PM CDTTornado WarningFGFGrant48 min
May 30, 9:22 PM CDTSevere Thunderstorm WarningFGFBecker, Clay, Norman38 min
May 30, 9:40 PM CDTSevere Thunderstorm WarningFGFPennington, Polk, Red Lake65 min
May 30, 9:43 PM CDTTornado WarningFGFPolk47 min
May 30, 9:48 PM CDTSevere Thunderstorm WarningFGFNorman, Polk27 min
May 30, 9:50 PM CDTSevere Thunderstorm WarningFGFKittson25 min
May 30, 10:12 PM CDTFlash Flood WarningFGFGrant9 hr
May 30, 10:20 PM CDTAreal Flood AdvisoryFGFPolk8 hr
May 30, 10:21 PM CDTSevere Thunderstorm WarningFGFBecker, Beltrami, Clearwater, Hubbard, Mahnomen, Otter Tail and 2 more54 min
May 30, 10:33 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more57 min
May 30, 11:16 PM CDTSevere Thunderstorm WarningFGFBeltrami29 min
May 31, 3:44 AM CDTWind AdvisoryFGFBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 11 more19 hr
May 30, 7:42 PM CDTSevere Thunderstorm WarningFGFRansom, Richland, Sargent63 min
May 30, 8:21 PM CDTSevere Thunderstorm WarningFGFRansom, Sargent24 min
May 30, 8:34 PM CDTTornado WarningFGFRichland26 min
May 31, 6:12 PM CDTHigh Wind WarningFGFBarnes, Benson, Cavalier, Eddy, Griggs, Nelson and 4 more3 hr

Nearby

Tornado Warnings in North Dakota, 2011Tornado Warnings in Minnesota, 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.