Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Great Falls, MT

May 28, 2014Blaine County, Chouteau County, Hill County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at May 28, 2014, 7:13 PM MDT for Blaine County, Chouteau County, Hill County, Montana. It was in force for 62 min. 9 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: May 28, 2014, 7:13 PM MDT (01:13 UTC)
Expired: May 28, 2014, 8:15 PM MDT
In force: 62 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blaine County, MT, Chouteau County, MT, Hill County, MT

The radar

The Glasgow radar (KGGW), 166 km from the middle of the area, began a volume at 01:15 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 28, 7:13 PM MDT	HAIL 2	Rocky Boy, MT
May 28, 7:20 PM MDT	HAIL 1	7 Se Rocky Boy, MT
May 28, 7:20 PM MDT	HAIL 2.5	7 Se Rocky Boy, MT	VEHICLE AND HOUSE SIDING WERE DAMAGED
May 28, 7:46 PM MDT	TSTM WND GST 76	10 S Chinook, MT	HAIL STILL QUARTER SIZE TWO HOURS AFTER IT FELL. WAS LIKELY LARGER. TREES IN THE AREA STRIPPED OF LEAVES. 0.91 RAIN IN A VERY SHORT PERIOD OF TIME.
May 28, 7:46 PM MDT	HAIL 1	10 S Chinook, MT	HAIL STILL QUARTER SIZE TWO HOURS AFTER IT FELL. WAS LIKELY LARGER. TREES IN THE AREA STRIPPED OF LEAVES. 0.91 RAIN IN A VERY SHORT PERIOD OF TIME.
May 28, 7:51 PM MDT	HAIL 1.5	15 Ese Lloyd, MT	LITTLE RAIN OR WIND.
May 28, 7:55 PM MDT	HAIL 0.5	18 Ese Lloyd, MT
May 28, 8:14 PM MDT	TSTM WND GST 60	Harlem, MT	WIND DAMAGE. POWER LINE BLOWN DOWN. SMALL FIRE STARTED.
May 28, 8:20 PM MDT	TSTM WND GST 60	13 S Fort Belknap, MT	60 MPH WIND GUST AT THE FORT BELKNAP RAWS. TIME OF EVENT IS ESTIMATED.

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 28, 4:59 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.2 hours before the alert went out and 152 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: 1475 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -92 m²/s²
0-3 km storm-relative helicity: 164 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.

508 
WUUS55 KTFX 290113
SVRTFX
MTC005-015-041-290215-
/O.NEW.KTFX.SV.W.0013.140529T0113Z-140529T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
713 PM MDT WED MAY 28 2014

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLAINE COUNTY IN NORTH CENTRAL MONTANA...
  NORTHEASTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA...
  SOUTHEASTERN HILL COUNTY IN NORTH CENTRAL MONTANA...

* UNTIL 815 PM MDT

* AT 708 PM MDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM BOX ELDER TO 23 MILES NORTHWEST OF WINIFRED...AND
  MOVING NORTHEAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

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

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HAVRE AROUND 740 PM MDT.
  CHINOOK AROUND 805 PM MDT.
  HAYS AROUND 810 PM MDT.

OTHER LOCATIONS IN THE WARNING INCLUDE LLOYD AND ZURICH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4815 10842 4798 10842 4797 10844 4798 10860
      4791 10864 4792 10887 4784 10888 4777 10958
      4838 11013 4901 10902 4901 10887
TIME...MOT...LOC 0113Z 241DEG 35KT 4835 10994 4789 10952

HAIL...1.00IN
WIND...60MPH

$$

13

2 follow-up statements

124 
WWUS55 KTFX 290147
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
747 PM MDT WED MAY 28 2014

MTC005-015-041-290215-
/O.CON.KTFX.SV.W.0013.000000T0000Z-140529T0215Z/
BLAINE MT-CHOUTEAU MT-HILL MT-
747 PM MDT WED MAY 28 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
HILL...NORTHEASTERN CHOUTEAU AND BLAINE COUNTIES UNTIL 815 PM MDT...

AT 741 PM MDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 9 MILES WEST OF CHINOOK TO 18 MILES NORTHWEST OF 
HAYS...AND MOVING NORTHEAST AT 45 MPH. 

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED.

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

SEVERE THUNDERSTORMS WILL BE NEAR...
  HAYS AROUND 755 PM MDT.
  HARLEM AND FORT BELKNAP AROUND 810 PM MDT.

OTHER LOCATIONS IN THE WARNING INCLUDE ZURICH AND LODGE POLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4815 10842 4798 10842 4797 10844 4798 10860
      4791 10864 4792 10887 4784 10888 4777 10958
      4838 11013 4901 10902 4901 10887
TIME...MOT...LOC 0147Z 241DEG 40KT 4859 10933 4813 10892

HAIL...1.00IN
WIND...60MPH

$$

876 
WWUS55 KTFX 290211
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
811 PM MDT WED MAY 28 2014

MTC005-015-041-290221-
/O.EXP.KTFX.SV.W.0013.000000T0000Z-140529T0215Z/
BLAINE MT-CHOUTEAU MT-HILL MT-
811 PM MDT WED MAY 28 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HILL...
NORTHEASTERN CHOUTEAU AND BLAINE COUNTIES WILL EXPIRE AT 815 PM
MDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.  HOWEVER...HAIL AND HEAVY RAIN ARE STILL POSSIBLE 
WITH THESE THUNDERSTORMS.

LAT...LON 4815 10842 4798 10842 4797 10844 4798 10860
      4791 10864 4792 10887 4784 10888 4777 10958
      4838 11013 4901 10902 4901 10887
TIME...MOT...LOC 0211Z 241DEG 40KT 4872 10897 4825 10857

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 6:15 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Hill	60 min
May 28, 6:48 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	57 min
May 28, 8:07 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	38 min
May 29, 2:45 PM MDT	River Flood Warning	TFX	Gallatin	68 hr

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.