Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 18, NWS Great Falls, MT

June 3, 2014Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 3, 2014, 3:05 PM MDT for Fergus County, Montana. It was in force for 40 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: Jun 3, 2014, 3:05 PM MDT (21:05 UTC)
Expired: Jun 3, 2014, 3:45 PM MDT
In force: 40 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Fergus County, MT

The radar

The Billings radar (KBLX), 110 km from the middle of the area, began a volume at 21:05 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

Time	Report	Where	Remark
Jun 3, 3:10 PM MDT	HAIL 1	10 Sse Forestgrove, MT	HAIL COVERED THE GROUND. STILL LOOKS LIKE IT SNOWED AT REPORT TIME.

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 one storm report to this severe thunderstorm warning; the first came 5 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

Great_falls, MT (KTFX), launched 12:00Z, 9.1 hours before the alert went out and 151 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1252 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

761 
WUUS55 KTFX 032105
SVRTFX
MTC027-032145-
/O.NEW.KTFX.SV.W.0018.140603T2105Z-140603T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
305 PM MDT TUE JUN 3 2014

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL FERGUS COUNTY IN CENTRAL MONTANA...

* UNTIL 345 PM MDT

* AT 300 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 17 MILES
  SOUTHWEST OF GRASS RANGE...AND MOVING SOUTHEAST AT 15 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.

* LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF SOUTHERN FERGUS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

LARGE HAIL...DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND LIGHTNING
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING
KILLS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

&&

LAT...LON 4682 10862 4675 10862 4674 10864 4675 10893
      4674 10897 4683 10920 4687 10919 4698 10913
      4697 10859 4684 10860
TIME...MOT...LOC 2105Z 293DEG 15KT 4687 10907

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

$$

WARANAUSKAS

2 follow-up statements

663 
WWUS55 KTFX 032118
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
318 PM MDT TUE JUN 3 2014

MTC027-032145-
/O.CON.KTFX.SV.W.0018.000000T0000Z-140603T2145Z/
FERGUS MT-
318 PM MDT TUE JUN 3 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
FERGUS COUNTY UNTIL 345 PM MDT...

AT 315 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 12 MILES SOUTHWEST
OF GRASS RANGE...AND MOVING EAST AT 20 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.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF SOUTHEASTERN FERGUS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

LARGE HAIL...DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND LIGHTNING
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING
KILLS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

&&

LAT...LON 4682 10862 4675 10862 4674 10864 4675 10892
      4682 10909 4697 10904 4697 10880 4697 10859
      4684 10860
TIME...MOT...LOC 2118Z 278DEG 19KT 4688 10891

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

$$

FOLTZ

620 
WWUS55 KTFX 032132
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
332 PM MDT TUE JUN 3 2014

MTC027-032145-
/O.CON.KTFX.SV.W.0018.000000T0000Z-140603T2145Z/
FERGUS MT-
332 PM MDT TUE JUN 3 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
FERGUS COUNTY UNTIL 345 PM MDT...

AT 329 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 11 MILES SOUTH OF
GRASS RANGE...AND MOVING EAST AT 20 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.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF SOUTHEASTERN FERGUS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

LARGE HAIL...DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND LIGHTNING
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING
KILLS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

&&

LAT...LON 4682 10862 4675 10862 4674 10864 4678 10881
      4684 10895 4695 10889 4696 10880 4693 10859
      4684 10860
TIME...MOT...LOC 2132Z 278DEG 19KT 4687 10880

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

$$

FOLTZ

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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 3, 2:40 PM MDT, 25 minutes earlier.

Area forecast discussion, Jun 3, 2:40 PM MDT, 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
240 PM MDT Tue Jun 3 2014

.DISCUSSION...
Today through Thursday...Thunderstorms continue to develop over
Southwest Montana spreading north and east into the evening. The
area with the greatest threat of thunderstorms will be Judith
Basin, Fergus, Chouteau, Hill, and Blaine counties. Some storms
may become strong with an isolated severe storm possible. The
main threat from these storms will likely be gusty winds and small
hail. Convective activity decreases overnight as the trof axis
pushes through. Lingering low level moisture and instability
Wednesday will allow for more isolated afternoon showers and
thunderstorms. Conditions dry out Wednesday night as westerly flow
aloft pushes across the area. A weak cold front will move across
the area Thursday cooling things a bit. Instability will allow
isolated afternoon thunderstorms to develop, mostly over Southwest
Montana. Temperatures will remain above seasonal averages today
and Wednesday but cool Thursday in the wake of the cold front.

Thursday night through Tuesday...The overall upper level pattern
late this week into early next week continues to feature an active
westerly flow aloft with several shortwave disturbances moving east
along the US/Canadian border. A broad trough in the upper levels
lingers over the Northern Rockies and MT Friday and Saturday while
surface high pressure shifting east into the Northern Plains States
brings a return flow from the east at the surface. This will result
in diurnal convection both days with somewhat better coverage on
Friday. Wind shear and upper level forcing looks relatively weak,
resulting in mainly terrain based convection and better chances over
the mtns. Models have come into slightly better agreement for the
next stronger wave to move into the region late this weekend/early
next week, tracking is farther north and delaying its arrival until
Sunday night or Monday with a period of mostly dry conditions
expected now on Sunday. Next trough drops into the region from the
NW Mon/Tuesday for increasing chances for precip and cooler temps.
Hoenisch

&&

.AVIATION...
UPDATED 1745Z.
Shortwave trof currently lifting thru western half of MT is
generating scattered -SHRA from KCTB southeastward to KLWT, with
precipitation area moving ENE.  Satellite imagery shows mostly clear
skies over southwest MT behind the precip.  Expect the clear slot to
move into central MT this aftn, which should help destabilize the
atmosphere for another round of -SHRA and -TSRA starting around
20Z.  Some of these storms, mainly east of KGTF, could be strong to
severe with gusty outflow winds and hail. This second round should
move into ern MT by 00Z, with steadily decreasing cloud cover at all
local TAF sites going into this evening.  Winds generally light
across the region this aftn, but local gusts of 30-35 kts possible
near any strong storms.
Waranauskas

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  46  73  45  66 /  40  20  10  20
CTB  46  72  43  61 /  40  20  10  10
HLN  49  77  48  74 /  40  20  10  20
BZN  43  73  42  75 /  40  30  10  20
WEY  35  68  33  71 /  40  20  10  20
DLN  44  72  43  75 /  40  20  10  10
HVR  47  75  45  67 /  60  40  10  10
LWT  45  69  45  65 /  60  20  20  20

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

weather.gov/greatfalls
www.twitter.com/NWSGreatFalls
www.facebook.com/US.NationalWeatherService.GreatFalls.gov

In the hours before

Local storm report, Jun 3, 1:52 PM MDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
152 PM MDT TUE JUN 03 2014

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

1225 PM     HAIL             5 SW WINDHAM            47.04N 110.22W
06/03/2014  E0.50 INCH       JUDITH BASIN       MT   TRAINED SPOTTER

1225 PM     HEAVY RAIN       5 SW WINDHAM            47.04N 110.22W
06/03/2014  M0.62 INCH       JUDITH BASIN       MT   TRAINED SPOTTER

&&

MPJ

Special weather statement, Jun 3, 2:26 PM MDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
226 PM MDT TUE JUN 3 2014

MTZ011-047-032100-
BLAINE MT-HILL MT-
226 PM MDT TUE JUN 3 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HILL AND
NORTHWESTERN BLAINE COUNTIES UNTIL 300 PM MDT...

AT 223 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 14 MILES NORTHWEST OF CHINOOK...MOVING NORTH AT
35 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHWESTERN BLAINE COUNTY...
  RURAL NORTHEASTERN HILL COUNTY...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4887 10914 4861 10937 4862 10967 4890 10962
      4899 10953 4899 10922
TIME...MOT...LOC 2027Z 192DEG 30KT 4873 10946

UTTECH

Local storm report, Jun 3, 2:32 PM MDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
232 PM MDT TUE JUN 03 2014

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

0210 PM     HAIL             6 ENE MOORE             47.00N 109.56W
06/03/2014  M0.25 INCH       FERGUS             MT   TRAINED SPOTTER

&&

MPJ

Local storm report, Jun 3, 2:46 PM MDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
246 PM MDT TUE JUN 03 2014

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

0220 PM     HAIL             11 S LEWISTOWN          46.91N 109.41W
06/03/2014  E0.50 INCH       FERGUS             MT   TRAINED SPOTTER

&&

MPJ

Local storm report, Jun 3, 2:53 PM MDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
253 PM MDT TUE JUN 03 2014

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

0240 PM     HAIL             6 WSW FORESTGROVE       46.95N 109.20W
06/03/2014  E1.25 INCH       FERGUS             MT   TRAINED SPOTTER

&&

UTTECH

Special weather statement, Jun 3, 3:01 PM MDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
301 PM MDT TUE JUN 3 2014

MTZ051-032130-
FERGUS MT-
301 PM MDT TUE JUN 3 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN FERGUS COUNTY UNTIL 330
PM MDT...

AT 256 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 8 MILES SOUTH OF MOORE...OR 18 MILES SOUTHWEST OF
LEWISTOWN...MOVING EAST AT 25 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTHERN FERGUS COUNTY...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4698 10938 4678 10936 4678 10975 4693 10975
TIME...MOT...LOC 2101Z 264DEG 21KT 4687 10963

UTTECH

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 2, 6:34 PM MDT	Special Weather Statement	TFX	Blaine	41 min
Jun 3, 1:27 PM MDT	Special Weather Statement	TFX	Judith Basin	48 min
Jun 3, 1:33 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	42 min
Jun 3, 1:47 PM MDT	Special Weather Statement	TFX	Blaine	43 min
Jun 3, 2:07 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	38 min
Jun 3, 2:26 PM MDT	Special Weather Statement	TFX	Blaine	34 min
Jun 3, 2:29 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	46 min
Jun 3, 3:01 PM MDT	Special Weather Statement	TFX	Fergus	29 min
Jun 3, 3:06 PM MDT	Special Weather Statement	TFX	Fergus	39 min
Jun 3, 3:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min

Nearby

Severe Thunderstorm Warnings in Montana, 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.