Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 52, NWS Grand Forks, ND

July 24, 20115 counties in Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 24, 2011, 7:08 PM CDT for 5 counties in Minnesota. It was in force for 52 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
Jul 24, 2011, 7:08 PM CDT (00:08 UTC)
Expired
Jul 24, 2011, 8:00 PM CDT
In force
52 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon

Counties Beltrami County, MN, Clearwater County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 136 km from the middle of the area, began a volume at 00:08 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
Jul 24, 7:15 PM CDTTSTM WND DMG7 Ne Goodridge, MNTIN BLOWN OFF OF ROOF. 8 TO 10 INCH DIAMETER TREE BRANCHES DOWN.
Jul 24, 7:15 PM CDTHAIL 1.757 Ne Goodridge, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.1 hours before the alert went out and 184 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 2011-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 99 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
99 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1295 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

997 
WFUS53 KFGF 250008
TORFGF
MNC007-029-089-113-119-250100-
/O.NEW.KFGF.TO.W.0052.110725T0008Z-110725T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
708 PM CDT SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA...
  NORTHWESTERN CLEARWATER COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA...
  EASTERN PENNINGTON COUNTY IN NORTHWEST MINNESOTA...
  EAST CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 800 PM CDT

* AT 704 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 6 MILES WEST OF ESPELIE...OR 19 MILES NORTHEAST OF THIEF
  RIVER FALLS...MOVING TO THE SOUTHEAST AT 30 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  ESPELIE AROUND 715 PM CDT.
  HIGH LANDING AROUND 720 PM CDT.
  BERNER AROUND 800 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 4777 9554 4791 9571 4796 9571 4796 9577
      4820 9604 4838 9574 4803 9507
TIME...MOT...LOC 0009Z 311DEG 27KT 4821 9576

$$

ROGERS
2 follow-up statements
227 
WWUS53 KFGF 250029
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
729 PM CDT SUN JUL 24 2011

MNC007-029-089-113-119-250100-
/O.CON.KFGF.TO.W.0052.000000T0000Z-110725T0100Z/
PENNINGTON MN-BELTRAMI MN-CLEARWATER MN-POLK MN-MARSHALL MN-
729 PM CDT SUN JUL 24 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL BELTRAMI
COUNTY IN NORTH CENTRAL MINNESOTA...AND SOUTHEASTERN MARSHALL...EAST
CENTRAL POLK...NORTHWESTERN CLEARWATER AND EASTERN PENNINGTON
COUNTIES IN NORTHWEST MINNESOTA UNTIL 800 PM CDT...

AT 727 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES SOUTHEAST
OF ESPELIE...OR 26 MILES EAST OF THIEF RIVER FALLS...MOVING TO THE
SOUTHEAST AT 30 MPH.

THE TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
POLK...EASTERN PENNINGTON...NORTHWESTERN CLEARWATER...SOUTHEASTERN
MARSHALL AND WEST CENTRAL BELTRAMI COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4777 9554 4791 9571 4796 9571 4797 9578
      4811 9594 4830 9559 4803 9507
TIME...MOT...LOC 0029Z 306DEG 25KT 4813 9559

$$

ROGERS
586 
WWUS53 KFGF 250045
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
745 PM CDT SUN JUL 24 2011

MNC089-119-250055-
/O.CAN.KFGF.TO.W.0052.000000T0000Z-110725T0100Z/
POLK MN-MARSHALL MN-
745 PM CDT SUN JUL 24 2011

...THE TORNADO WARNING FOR SOUTHEASTERN MARSHALL AND EAST CENTRAL
POLK COUNTIES IN NORTHWEST MINNESOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4783 9542 4812 9572 4824 9548 4803 9507
TIME...MOT...LOC 0045Z 306DEG 25KT 4806 9546

$$

MNC007-029-113-250100-
/O.CON.KFGF.TO.W.0052.000000T0000Z-110725T0100Z/
PENNINGTON MN-BELTRAMI MN-CLEARWATER MN-
745 PM CDT SUN JUL 24 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL BELTRAMI
COUNTY IN NORTH CENTRAL MINNESOTA...AND NORTHWESTERN CLEARWATER AND
NORTHEASTERN PENNINGTON COUNTIES IN NORTHWEST MINNESOTA UNTIL 800 PM
CDT...

AT 740 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES SOUTHWEST
OF JELLE...OR 31 MILES EAST OF THIEF RIVER FALLS...MOVING TO THE
SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN CLEARWATER...NORTHERN CLEARWATER AND
  NORTHWESTERN CLEARWATER COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4783 9542 4812 9572 4824 9548 4803 9507
TIME...MOT...LOC 0045Z 306DEG 25KT 4806 9546

$$

ROGERS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 9:09 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Polk66 min

Nearby

Tornado 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.