Alert archive / Montana / Tornado Warnings in 2013

Tornado Warning 3, NWS Glasgow, MT

July 15, 2013Roosevelt County, Montana

NWS Glasgow, MT issued this tornado warning at Jul 15, 2013, 4:25 PM MDT for Roosevelt County, Montana. It was in force for 35 min. 4 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 15, 2013, 4:25 PM MDT (22:25 UTC)
Expired: Jul 15, 2013, 5:00 PM MDT
In force: 35 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

County Roosevelt County, MT

The radar

The Glasgow radar (KGGW), 111 km from the middle of the area, began a volume at 22:26 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
Jul 15, 4:41 PM MDT	TORNADO	22 N Poplar, MT	TORNADO IS VISIBLE 22 MILES NORTH OF POPLAR.
Jul 15, 4:55 PM MDT	FUNNEL CLOUD	24 Nnw Brockton, MT	COULD NOT TELL IF FUNNEL ACTUALLY TOUCHED GROUND
Jul 15, 4:55 PM MDT	HAIL 1	24 Nnw Brockton, MT
Jul 15, 5:09 PM MDT	TORNADO	20 N Poplar, MT	VIDEO OF TORNADO SENT TO NWS... TORNADO ON THE GROUND AT 509 PM MDT.

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 tornado warning; the first came 16 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 15, 2:48 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.4 hours before the alert went out and 109 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: 443 J/kg
Mixed-layer CIN: -340 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.8

Open this sounding in Storm Lab

The text

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

769 
WFUS55 KGGW 152225
TORGGW
MTC085-152300-
/O.NEW.KGGW.TO.W.0003.130715T2225Z-130715T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
425 PM MDT MON JUL 15 2013

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN ROOSEVELT COUNTY IN NORTHEAST MONTANA...

* UNTIL 500 PM MDT.

* AT 422 PM MDT...THE PUBLIC REPORTED A TORNADO OVER CENTRAL
  ROOSEVELT COUNTY...OR 21 MILES NORTH OF POPLAR...MOVING EAST AT 15
  MPH.

* THE TORNADO WILL REMAIN OVER RURAL AREAS OF ROOSEVELT COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT MONDAY EVENING
FOR NORTHEAST MONTANA.

&&

LAT...LON 4831 10502 4835 10540 4847 10542 4856 10508
      4856 10504
TIME...MOT...LOC 2224Z 250DEG 14KT 4841 10531

$$

BARNWELL
WEATHER.GOV/GLASGOW

1 follow-up statement

792 
WWUS55 KGGW 152242
SVSGGW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
442 PM MDT MON JUL 15 2013

MTC085-152300-
/O.CON.KGGW.TO.W.0003.000000T0000Z-130715T2300Z/
ROOSEVELT-
442 PM MDT MON JUL 15 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM MDT FOR CENTRAL
ROOSEVELT COUNTY...

AT 439 PM MDT...THE PUBLIC REPORTED A TORNADO.  THIS TORNADO WAS
LOCATED OVER NORTHERN ROOSEVELT COUNTY...OR 22 MILES NORTH OF
POPLAR...AND MOVING EAST AT 15 MPH.

THE TORNADO WILL REMAIN OVER RURAL AREAS OF ROOSEVELT COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT MONDAY EVENING
FOR NORTHEAST MONTANA.

&&

LAT...LON 4831 10502 4834 10533 4846 10533 4854 10504
TIME...MOT...LOC 2240Z 250DEG 14KT 4843 10522

$$

BARNWELL
WEATHER.GOV/GLASGOW

What forecasters said that day

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

NWS Glasgow, MT wrote its last area forecast discussion before this tornado warning went out at Jul 15, 3:04 PM MDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jul 15, 3:04 PM MDT, 1 hour 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
304 PM MDT MON JUL 15 2013

.SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH WEDNESDAY...

STAGE IS SET FOR SEVERE THUNDERSTORMS TO DEVELOP THIS AFTERNOON
AND EVENING. ATMOSPHERIC PARAMETERS APPEAR MORE FAVORABLE FOR
SUCH FURTHER EAST THROUGH OUR CWA. CANNOT RULE OUT A TORNADO.

FORECAST CHALLENGES WILL FOCUS ON THE IMMEDIATE THREAT FOR SEVERE
THUNDERSTORMS THIS AFTERNOON AND EVENING...KEEPING AN EYE ON
MULTIPLE OUTFLOW BOUNDARIES.

STORMS ARE EXPECTED TO INITIATE AND INTENSIFY ALONG AND JUST AHEAD
OF THE SURFACE TROUGH AND DRY LINE NOW MOVING OVER OUR WESTERN
ZONES. HIGH RESOLUTION MODELS SHOWING A NORTH-TO-SOUTH ORIENTED
LINE OF STORMS WHICH MARCH EASTWARD AND INTENSIFY.

LINGERING THUNDERSTORMS LATE TONIGHT MAY STILL BE SEVERE NEAR THE
NORTH DAKOTA BORDER...BUT SHOULD QUICKLY DIMINISH TOWARD THE
MIDNIGHT HOUR.

THE STRONGER POST-FRONTAL WINDS FROM THE NORTHWEST AND NORTH WILL
TAKE A WHILE TO FILTER INTO THE AREA...SAY EARLY TO MID MORNING ON
TUESDAY. AT THIS TIME A WIDE-SPREAD 15G25KT WILL PROBABLY BE THE
CASE WITH A FEW HIGHER GUSTS NEAR THE LITTLE ROCKY MOUNTAINS. ANY
STRONGER WINDS WILL PROBABLY BE SUBDUED BY THE LACK OF STRONG
SUBSIDENCE BEHIND THE FRONT. IN FACT...LIGHT ASCENT REMAINS POST-
FRONTAL ACROSS MOST OF THE CWA THROUGH TUESDAY WITH MODELS SHOWING
LIGHT PRECIP LINGERING FROM TIME TO TIME.

BY MID-WEEK...HIGH PRESSURE FROM THE CENTRAL PLAINS AND CENTRAL
ROCKIES REGIONS WILL PUSH NORTHWARD AND BRING A DRIER WEATHER
PATTERN TO OUR REGION. BMICKELSON

.LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...
GOOD MODEL AGREEMENT REGARDING RIDGE RETROGRADING INTO THE
NORTHERN ROCKIES THROUGH THURSDAY. MEANWHILE...A SHORTWAVE TROUGH
MOVING THROUGH THE AREA ON NW FLOW ALOFT COULD BRING A CHANCE OF
THUNDERSTORMS THURSDAY AND THURSDAY NIGHT.

THE RIDGE IS EXPECTED TO PREVAIL FRIDAY AND SATURDAY WITH DRY
WEATHER AND NEAR NORMAL TO SLIGHTLY ABOVE NORMAL TEMPERATURES.

BOTH THE GFS AND ECMWF WANT TO BRING A SHORTWAVE TROUGH THROUGH
THE AREA ON SUNDAY WITH A COLD FRONT. WHILE THERE HAS BEEN SOME
RUN TO RUN DIFFERENCES...INTRODUCING A CHANCE OF THUNDERSTORMS
MAINLY ON SUNDAY LOOKS REASONABLE AT THIS POINT. WITH THE AREA
BETWEEN SYSTEMS...MONDAY LOOKS DRY FOR NOW. FORRESTER

&&

.AVIATION...
THUNDERSTORMS WILL INTENSIFY AND BECOME MORE WIDESPREAD IN THE
LATE AFTERNOON AND EVENING...DRIVEN BY A COLD FRONT MOVING THOUGH
EASTERN MONTANA. THE STORMS ARE EXPECTED TO BE EAST OF THE STATE
BY MIDNIGHT.

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

WEATHER.GOV/GLASGOW

Hazardous weather outlook, Jul 15, 3:11 AM MDT, 13 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
311 AM MDT MON JUL 15 2013

MTZ017>020-023>027-061-062-160915-
CENTRAL AND SOUTHERN VALLEY-DANIELS-SHERIDAN-WESTERN ROOSEVELT-
MCCONE-RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN VALLEY-
EASTERN ROOSEVELT-
311 AM MDT MON JUL 15 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT MOVING ACROSS NORTHEAST MONTANA TODAY WILL BRING A
CHANCE FOR STRONG THUNDERSTORMS TO DEVELOP IN THE AFTERNOON AND
EVENING. SOME OF THESE STORMS MAY BECOME SEVERE WITH THE
POSSIBILITY OF LARGE HAIL AND DAMAGING WIND AS THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jul 15, 4:02 PM MDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
402 PM MDT MON JUL 15 2013

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

0400 PM     TORNADO          20 N WOLF POINT         48.38N 105.64W
07/15/2013                   ROOSEVELT          MT   LAW ENFORCEMENT

            LAW ENFORCEMENT IS REPORT MULTIPLE CALLS OF A TORANDO ON
            THE GROUND EAST OF VOLT NEAR STATE HIGHWAY 13.

&&

PROTON

Local storm report, Jul 15, 4:02 PM MDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
402 PM MDT MON JUL 15 2013

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

0345 PM     TORNADO          20 N WOLF POINT         48.38N 105.64W
07/15/2013                   ROOSEVELT          MT   LAW ENFORCEMENT

            LAW ENFORCEMENT IS REPORTING MULTIPLE CALLS OF A TORANDO
            ON THE GROUND EAST OF VOLT NEAR STATE HIGHWAY 13.

&&

PROTON

Local storm report, Jul 15, 4:03 PM MDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
403 PM MDT MON JUL 15 2013

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

0400 PM     HAIL             4 NW SCOBEY             48.83N 105.48W
07/15/2013  E1.00 INCH       DANIELS            MT   CO-OP OBSERVER

&&

BB

Local storm report, Jul 15, 4:08 PM MDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
408 PM MDT MON JUL 15 2013

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

0400 PM     TORNADO          11 SW BREDETTE          48.39N 105.45W
07/15/2013                   ROOSEVELT          MT   PUBLIC

            PUBLIC REPORTS A TORNADO ON THE GROUND ON STATE ROUTE 13
            NEAR MILE MARKER 23 AT 4 PM.

&&

PROTON

Local storm report, Jul 15, 4:18 PM MDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
418 PM MDT MON JUL 15 2013

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

0410 PM     HAIL             1 S PORT OF SCOBEY      48.98N 105.41W
07/15/2013  E1.00 INCH       DANIELS            MT   LAW ENFORCEMENT

&&

BB

Local storm report, Jul 15, 4:20 PM MDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
420 PM MDT MON JUL 15 2013

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

0400 PM     HAIL             6 NW SCOBEY             48.85N 105.51W
07/15/2013  E1.75 INCH       DANIELS            MT   PUBLIC

&&

BB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:14 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan, Valley	61 min
Jul 15, 3:45 PM MDT	Tornado Warning	GGW	Roosevelt	30 min
Jul 15, 3:50 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	55 min
Jul 15, 3:58 PM MDT	Tornado Warning	GGW	Roosevelt	32 min
Jul 15, 4:19 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	56 min
Jul 15, 4:53 PM MDT	Tornado Warning	GGW	Roosevelt	37 min
Jul 15, 5:13 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	62 min

Nearby

Tornado Warnings in Montana, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.