Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 71, NWS Grand Forks, ND

September 19, 2014Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 19, 2014, 8:29 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 61 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: Sep 19, 2014, 8:29 PM CDT (01:29 UTC)
Expired: Sep 19, 2014, 9:30 PM CDT
In force: 61 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Lake of the Woods County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 228 km from the middle of the area, began a volume at 01:31 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
Sep 19, 8:40 PM CDT	TSTM WND DMG	1 N Warroad, MN	TREES 6 INCHES IN DIAMETER AND LARGER FELLED. DIFFICULT TO SEE EXTENT OF DAMAGE IN THE DARK.
Sep 19, 8:40 PM CDT	TSTM WND DMG	2 N Warroad, MN	NUMEROUS TREES 6 INCHES IN DIAMETER AND LARGER WERE BROKEN DOWN ACROSS NORTHERN LAKE WEST AND LAKE EAST TOWNSHIPS. ONE POWER POLE WAS BLOWN OUT BY LIGHTNING AND POWER LINES WERE TAKEN DOWN AT MULTIPLE LOCATIONS.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 11 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.5 hours before the alert went out and 134 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: 572 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

708 
WUUS53 KFGF 200129
SVRFGF
MNC077-135-200230-
/O.NEW.KFGF.SV.W.0071.140920T0129Z-140920T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
829 PM CDT FRI SEP 19 2014

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA...
  NORTHEASTERN ROSEAU COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 930 PM CDT

* AT 827 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WARROAD...
  AND MOVING EAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
           ROOFS...SIDING AND TREES.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROOSEVELT AROUND 835 PM CDT.
  ARNESEN AROUND 840 PM CDT.
  LONG POINT AROUND 845 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM...ON THE LOWEST FLOOR OF
A BUILDING.

&&

LAT...LON 4881 9534 4901 9533 4901 9516 4905 9516
      4903 9472 4880 9470 4876 9465
TIME...MOT...LOC 0129Z 274DEG 29KT 4891 9519

HAIL...1.25IN
WIND...60MPH

$$

VOELKER

2 follow-up statements

505 
WWUS53 KFGF 200156
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
856 PM CDT FRI SEP 19 2014

MNC077-135-200230-
/O.CON.KFGF.SV.W.0071.000000T0000Z-140920T0230Z/
LAKE OF THE WOODS MN-ROSEAU MN-
856 PM CDT FRI SEP 19 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME EAST
CENTRAL ROSEAU AND CENTRAL LAKE OF THE WOODS COUNTIES UNTIL 930 PM
CDT...

AT 854 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHEAST
OF LONG POINT...AND MOVING EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
         ROOFS...SIDING AND TREES.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL
LAKE OF THE WOODS AND EXTREME EAST CENTRAL ROSEAU COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM...ON THE LOWEST FLOOR OF
A BUILDING.

&&

LAT...LON 4880 9516 4901 9517 4901 9516 4905 9516
      4903 9472 4880 9470 4876 9465
TIME...MOT...LOC 0156Z 274DEG 29KT 4889 9486

HAIL...1.25IN
WIND...60MPH

$$

VOELKER

244 
WWUS53 KFGF 200228
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
928 PM CDT FRI SEP 19 2014

MNC077-135-200238-
/O.EXP.KFGF.SV.W.0071.000000T0000Z-140920T0230Z/
LAKE OF THE WOODS MN-ROSEAU MN-
928 PM CDT FRI SEP 19 2014

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL ROSEAU
AND CENTRAL LAKE OF THE WOODS COUNTIES WILL EXPIRE AT 930 PM CDT...

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

LAT...LON 4880 9516 4901 9517 4901 9516 4905 9516
      4903 9472 4880 9470 4876 9465
TIME...MOT...LOC 0228Z 274DEG 29KT 4887 9447

$$

VOELKER

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 19, 6:52 PM CDT, 1 hour 37 minutes earlier.

Area forecast discussion, Sep 19, 6:52 PM CDT, 1 hour 37 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND FORKS ND
652 PM CDT FRI SEP 19 2014

.UPDATE...
ISSUED AT 651 PM CDT FRI SEP 19 2014

NO CHANGES AT THIS TIME.

&&

.SHORT TERM...(THIS EVENING THROUGH SATURDAY NIGHT)
ISSUED AT 313 PM CDT FRI SEP 19 2014

CONVECTIVE CHANCES AND STRENGTH WILL BE THE MAIN FORECAST PROBLEM
FOR TONIGHT AND TOMORROW.

WV LOOP SHOWS THE LEADING SHORTWAVE TROUGH THAT BROUGHT THE
MORNING ACTIVITY MOVING OFF INTO MN WHILE THERE IS ANOTHER
SHORTWAVE UPSTREAM OVER MT. THE FIRST SHORTWAVE WILL MOVE OFF TO
THE EAST OVERNIGHT AND THE SECOND MORE WEAK WAVE WILL COME INTO
THE NORTHERN PLAINS. THE SFC TROUGH AXIS WILL MOVE OFF FROM THE
RED RIVER VALLEY INTO EASTERN MN...WITH A WEAK FRONTAL BOUNDARY
DROPPING INTO THE CWA. THE SHORT RANGE MODELS ALL HAVE SOME WIDELY
SCATTERED PRECIP ACTIVITY ALONG THIS BOUNDARY AS IT MOVES INTO OUR
NORTHERN COUNTIES THIS EVENING. AFTER CLOUDS MUCH OF THE DAY...THE
WESTERN HALF OF THE CWA HAS FINALLY CLEARED OUT AND GAINED SOME
SFC BASED INSTABILITY. THERE HAVE BEEN TOWERING CU AND A FEW RADAR
RETURNS DEVELOPING ALONG THE SFC TROUGH AXIS IN OUR NORTHERN CWA
WHILE THE CAP HAS REMAINED IN PLACE FURTHER SOUTH.

THINK THERE WILL BE SOME CONVECTION ALONG THE SFC BOUNDARY IT
MOVES SOUTH OUT OF CANADA. THE BEST UPPER SUPPORT WILL BE OVER THE
WESTERN PARTS OF ND AS THE WEAK SHORTWAVE COMES OUT OF MT...AND
THE SHORTWAVE OVER THE RED RIVER VALLEY MOVES EAST. THERE SEEMS TO
BE SOME DISCONNECT BETWEEN THE UPPER SUPPORT AND THE BEST
INSTABILITY...SO FOR NOW WILL KEEP OUT ANY MENTION OF SEVERE BUT
SOME ISOLATED LARGE HAIL IS NOT OUT OF THE QUESTION. ANY
CONVECTION ALONG THE BOUNDARY WILL TAPER OFF BY LATE EVENING.

TOMORROW...A MUCH STRONGER SHORTWAVE TROUGH WILL BEGIN TO DIG INTO
WESTERN MN OUT OF CANADA. THERE WILL BE A BRIEF PERIOD OF WESTERLY
WINDS...BUT A STRONGER COLD FRONT WILL MOVE DOWN INTO THE CWA BY
PEAK HEATING. THERE DOES NOT SEEM TO BE A HUGE AMOUNT OF
INSTABILITY AVAILABLE...WITH SFC BASED CAPE OF AROUND 1000 J/KG ON
THE HIGHER END OF THE MODELS...BUT FORCING WITH THE INCOMING
SHORTWAVE WILL BE VERY STRONG. WILL HAVE TO WATCH FOR WIND AND
HAIL POSSIBILITIES TOMORROW AFTERNOON. THE FRONT WILL ALSO KNOCK
DOWN TEMPS A BIT CLOSER TO AVERAGE FOR THIS TIME OF YEAR.

SATURDAY NIGHT...THE UPPER TROUGH WILL MOVE OFF INTO THE GREAT
LAKES...LEAVING THE NORTHERN PLAINS IN NORTHWESTERLY FLOW ALOFT.
THE CENTER OF THE SFC HIGH BEHIND THE COLD FRONT WILL REMAIN OVER
THE WESTERN PLAINS AND WE SHOULD HAVE SOME LINGERING CLOUD
COVER...SO KEPT LOWS AROUND 50 DEGREES.

.LONG TERM...(SUNDAY THROUGH FRIDAY)
ISSUED AT 313 PM CDT FRI SEP 19 2014

SUNDAY AND MONDAY...CONDITIONS WILL BE FAIRLY QUIET AS WE
TRANSITION FROM NORTHWESTERLY FLOW ALOFT TO A RIDGE OVER THE
PLAINS. A CUT OFF UPPER LOW WILL REMAIN TO OUR SOUTH AND WEST.
TEMPERATURES SHOULD SEE A SLIGHT WARMING TREND FROM THE UPPER 60S
ON SUNDAY INTO THE LOW 70S ON MONDAY AS THE SFC HIGH MOVES OFF TO
THE SOUTHEAST AND RETURN FLOW SETS UP OVER THE REGION.

WILL START OFF THE MON NIGHT THROUGH FRIDAY PERIOD WITH 500MB
RIDGING OVER THE FA...BUT WILL HAVE A 500MB LOW CUTTING THRU THE
RIDGE OVER THE WESTERN HIGH PLAINS. THIS LOW WILL SLOWLY CROSS THE
NORTHERN PLAINS TUE THROUGH WED NIGHT. THEREFORE WILL KEEP MON NIGHT
DRY BUT HAVE SOME PCPN CHANCES TUE THRU WED NIGHT. AS THE LOW PASSES
OFF TO THE EAST WILL BE LOOKING AT DRY WEATHER AGAIN FOR THU/FRI.
TEMPS GENERALLY LOOK CLOSE TO NORMAL EARLY ON...BUT BECOME A LITTLE
WARMER AGAIN BY THU/FRI.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z SATURDAY EVENING)
ISSUED AT 651 PM CDT FRI SEP 19 2014

ISOLATED STORMS THIS EVENING OTHERWISE VFR THROUGH THE PERIOD WITH
WIND SWITCHING TO THE NW FROM NW-SE.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...NONE.
MN...NONE.
&&

UPDATE...VOELKER
SHORT TERM...JR
LONG TERM...JR/GODON
AVIATION...VOELKER

Hazardous weather outlook, Sep 19, 6:43 AM CDT, 13 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND FORKS ND
643 AM CDT FRI SEP 19 2014

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-201145-
WEST POLK-NORMAN-CLAY-KITTSON-ROSEAU-LAKE OF THE WOODS-
WEST MARSHALL-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-RED LAKE-
EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN-
SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WILKIN-
WEST OTTER TAIL-EAST OTTER TAIL-WADENA-GRANT-TOWNER-CAVALIER-
PEMBINA-BENSON-RAMSEY-EASTERN WALSH-EDDY-NELSON-GRAND FORKS-
GRIGGS-STEELE-TRAILL-BARNES-CASS-RANSOM-SARGENT-RICHLAND-
WESTERN WALSH-
643 AM CDT FRI SEP 19 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH
DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE FOR ALL OF EASTERN
NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA FROM 6 AM
TO 5 PM SATURDAY. STORMS MAY PRODUCE SOME LARGE HAIL AND DAMAGING
WINDS.

A STRONG UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE AREA
SATURDAY AND PRODUCE THE SEVERE WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

HOPPES

In the hours before

Local storm report, Sep 19, 7:37 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
737 PM CDT FRI SEP 19 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 PM     HAIL             1 N GREENBUSH           48.71N 96.18W
09/19/2014  E1.00 INCH       ROSEAU             MN   PUBLIC

&&

MEWENS

Local storm report, Sep 19, 7:40 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
740 PM CDT FRI SEP 19 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 PM     FUNNEL CLOUD     4 W GREENBUSH           48.70N 96.27W
09/19/2014                   ROSEAU             MN   TRAINED SPOTTER

            FUNNEL VIEWED FROM 1N GREENBUSH. LOCATION APPROXIMATED.

&&

GGUST

Local storm report, Sep 19, 7:46 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
746 PM CDT FRI SEP 19 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0736 PM     FUNNEL CLOUD     5 WNW GREENBUSH         48.73N 96.29W
09/19/2014                   ROSEAU             MN   TRAINED SPOTTER

            VERY LARGE ROTATION ESTIMATED AT LEAST 1 MILE ACROSS

&&

MEWENS

Local storm report, Sep 19, 8:08 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
808 PM CDT FRI SEP 19 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0740 PM     HAIL             2 SW GREENBUSH          48.68N 96.21W
09/19/2014  E1.75 INCH       ROSEAU             MN   PUBLIC

            WIND DRIVEN HAIL BROKE SEVERAL WINDOWS.

&&

GGUST

Local storm report, Sep 19, 8:19 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
819 PM CDT FRI SEP 19 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0627 PM     TSTM WND DMG     5 NNE HALLOCK           48.83N 96.90W
09/19/2014                   KITTSON            MN   LAW ENFORCEMENT

            SIGNIFICANT DAMAGE REPORTED TO A SHED... QUONSET AND
            NUMEROUS TREES AT A FARMSTEAD LOCATED ABOUT 3 MILES EAST
            OF NORTHCOTE.

&&

GGUST

Special weather statement, Sep 19, 8:24 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
824 PM CDT FRI SEP 19 2014

MNZ005-006-200230-
LAKE OF THE WOODS MN-ROSEAU MN-
824 PM CDT FRI SEP 19 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ROSEAU AND CENTRAL
LAKE OF THE WOODS COUNTIES UNTIL 930 PM CDT...

AT 823 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
THUNDERSTORM NEAR WARROAD...OR 24 MILES EAST OF ROSEAU...MOVING TO
THE EAST AT 35 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THE STORM.

THE STORM WILL BE NEAR...
ROOSEVELT AND ARNESEN AROUND 830 PM CDT.
LONG POINT AROUND 835 PM CDT.
WILLIAMS AROUND 840 PM CDT.
GRACETON AROUND 845 PM CDT.

BE PREPARED TO TAKE SHELTER IF THE STORMS INTENSIFY AND BECOME
SEVERE...OR A WARNING IS ISSUED BY THE NATIONAL WEATHER SERVICE.

LAT...LON 4870 9542 4901 9536 4901 9516 4906 9516
      4905 9474 4901 9471 4888 9467 4883 9469
      4878 9468 4873 9458 4870 9445 4865 9442
TIME...MOT...LOC 0124Z 272DEG 47KT 4891 9523

VOELKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 7:00 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Roseau	22 min
Sep 19, 7:15 PM CDT	Tornado Warning	FGF	Kittson, Roseau	45 min
Sep 19, 7:57 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Marshall, Roseau	48 min
Sep 19, 8:24 PM CDT	Special Weather Statement	FGF	Lake of the Woods	66 min
Sep 20, 1:33 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clay, Clearwater, Mahnomen, Norman and 2 more	57 min
Sep 20, 2:30 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Polk	36 min
Sep 20, 3:20 PM CDT	Special Weather Statement	FGF	Hubbard, Wadena	25 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014 Every severe thunderstorm warning in 2014

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.