Alert archive / Montana / Tornado Warnings in 2013
Tornado Warning 2, NWS Great Falls, MT
NWS Great Falls, MT issued this tornado warning at Jul 8, 2013, 2:40 PM MDT for Fergus County, Montana. It was in force for 35 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
- Jul 8, 2013, 2:40 PM MDT (20:40 UTC)
- Expired
- Jul 8, 2013, 3:15 PM MDT
- In force
- 35 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Fergus County, MT
The radar
The Billings radar (KBLX), 119 km from the middle of the area, began a volume at 20:41 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 8, 2:40 PM MDT | HAIL 1.5 | 10 S Moore, MT |
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 |
|---|---|---|---|
| Jul 8, 1:04 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.7 hours before the alert went out and 123 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.
- Mixed-layer CAPE
- 110 J/kg
- Mixed-layer CIN
- -288 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
627
WFUS55 KTFX 082040
TORTFX
MTC027-082115-
/O.NEW.KTFX.TO.W.0002.130708T2040Z-130708T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
240 PM MDT MON JUL 8 2013
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN FERGUS COUNTY IN CENTRAL MONTANA...
* UNTIL 315 PM MDT
* AT 236 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 26 MILES WEST OF
FORESTGROVE...OR 14 MILES SOUTHWEST OF LEWISTOWN...MOVING EAST AT
40 MPH.
* THE MOST DANGEROUS PORTION OF THE STORM WILL GENERALLY REMAIN OVER
RURAL AREAS OF SOUTHERN FERGUS COUNTY.
THIS ALSO INCLUDES HIGHWAY 87 BETWEEN MILE MARKERS 39 AND 40.
THIS ALSO INCLUDES HIGHWAY 200 BETWEEN MILE MARKERS 68 AND 72.
IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM MDT MONDAY
EVENING FOR SOUTHWEST MONTANA.
&&
LAT...LON 4674 10902 4674 10938 4671 10939 4671 10941
4684 10974 4703 10966 4697 10871
TIME...MOT...LOC 2040Z 284DEG 34KT 4689 10955
$$
PAN1 follow-up statement
424
WWUS55 KTFX 082112
SVSTFX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
312 PM MDT MON JUL 8 2013
MTC027-082122-
/O.EXP.KTFX.TO.W.0002.000000T0000Z-130708T2115Z/
FERGUS MT-
312 PM MDT MON JUL 8 2013
...THE TORNADO WARNING FOR SOUTHERN FERGUS COUNTY WILL EXPIRE AT 315
PM MDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM MDT MONDAY
EVENING FOR SOUTHWEST MONTANA.
LAT...LON 4674 10902 4674 10938 4671 10939 4671 10941
4684 10974 4703 10966 4697 10871
TIME...MOT...LOC 2112Z 284DEG 34KT 4681 10912
$$
MLVThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 6:23 PM MDT | Special Weather Statement | TFX | Fergus | 37 min |
| Jul 7, 7:39 PM MDT | Special Weather Statement | TFX | Judith Basin | 51 min |
| Jul 7, 8:38 PM MDT | Special Weather Statement | TFX | Judith Basin | 52 min |
| Jul 8, 2:01 AM MDT | Special Weather Statement | TFX | Cascade | 44 min |
| Jul 8, 2:21 AM MDT | Special Weather Statement | TFX | Liberty | 39 min |
| Jul 8, 2:31 AM MDT | Special Weather Statement | TFX | Cascade | 44 min |
| Jul 8, 2:43 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 47 min |
| Jul 8, 3:05 AM MDT | Special Weather Statement | TFX | Cascade | 40 min |
| Jul 8, 3:09 AM MDT | Special Weather Statement | TFX | Liberty | 51 min |
| Jul 8, 3:14 AM MDT | Special Weather Statement | TFX | Cascade | 46 min |
| Jul 8, 7:35 AM MDT | Special Weather Statement | TFX | Hill | 25 min |
| Jul 8, 8:00 AM MDT | Special Weather Statement | TFX | Hill | 30 min |
| Jul 8, 8:23 AM MDT | Special Weather Statement | TFX | Lewis and Clark, Teton | 22 min |
| Jul 8, 8:35 AM MDT | Special Weather Statement | TFX | Hill | 40 min |
| Jul 8, 9:04 AM MDT | Special Weather Statement | TFX | Cascade, Teton | 41 min |
| Jul 8, 9:07 AM MDT | Special Weather Statement | TFX | Toole | 38 min |
| Jul 8, 10:18 AM MDT | Special Weather Statement | TFX | Chouteau | 42 min |
| Jul 8, 12:48 PM MDT | Special Weather Statement | TFX | Broadwater | 42 min |
| Jul 8, 1:28 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 47 min |
| Jul 8, 1:49 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 41 min |
| Jul 8, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 42 min |
| Jul 8, 2:14 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 46 min |
| Jul 8, 2:15 PM MDT | Special Weather Statement | TFX | Jefferson | 30 min |
| Jul 8, 2:26 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 34 min |
| Jul 8, 2:43 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Gallatin, Meagher | 32 min |
| Jul 8, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 42 min |
| Jul 8, 3:11 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 49 min |
| Jul 8, 3:35 PM MDT | Special Weather Statement | TFX | Glacier | 40 min |
| Jul 8, 3:35 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 25 min |
| Jul 8, 3:39 PM MDT | Special Weather Statement | TFX | Meagher | 36 min |
| Jul 8, 3:58 PM MDT | Special Weather Statement | TFX | 47 min | |
| Jul 8, 4:33 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Gallatin, Madison | 42 min |
| Jul 8, 4:52 PM MDT | Special Weather Statement | TFX | Pondera | 38 min |
| Jul 8, 4:56 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton, Toole | 49 min |
| Jul 8, 5:14 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 46 min |
| Jul 8, 5:40 PM MDT | Special Weather Statement | TFX | Liberty, Teton, Toole | 50 min |
| Jul 8, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Liberty, Pondera, Teton | 40 min |
Nearby
Tornado Warnings in Montana, 2013Every tornado warning in 2013Tornadoes 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.