Alert archive / Montana / Tornado Warnings in 2009
Tornado Warning 2, NWS Great Falls, MT
NWS Great Falls, MT issued this tornado warning at Jul 6, 2009, 2:25 PM MDT for Lewis and Clark 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 6, 2009, 2:25 PM MDT (20:25 UTC)
- Expired
- Jul 6, 2009, 3:00 PM MDT
- In force
- 35 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Lewis and Clark County, MT
The radar
The Great Falls radar (KTFX), 92 km from the middle of the area, began a volume at 20:26 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 6, 2:47 PM MDT | HAIL 1.75 | 7 Se Canyon Creek, MT | QUARTER TO GOLFBALL SIZE HAIL REPORTED 7 MILES SOUTHEAST OF CANYON CREEK. |
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 6, 1:33 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.4 hours before the alert went out and 135 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
- 33 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 1575 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KTFX 062025 TORTFX MTC049-062100- /O.NEW.KTFX.TO.W.0002.090706T2025Z-090706T2100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 225 PM MDT MON JUL 6 2009 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTH CENTRAL LEWIS AND CLARK COUNTY IN WEST CENTRAL MONTANA... * UNTIL 300 PM MDT * AT 223 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MARYSVILLE...OR 14 MILES NORTHWEST OF HELENA...MOVING NORTHEAST AT 30 MPH. * THE MOST DANGEROUS PORTION OF THE STORM WILL GENERALLY REMAIN OVER RURAL AREAS OF SOUTH CENTRAL LEWIS AND CLARK COUNTY. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND STRAIGHT LINE WIND GUSTS TO 60 MPH. 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT MONDAY EVENING FOR WESTERN MONTANA. LAT...LON 4694 11199 4674 11179 4658 11228 4674 11239 TIME...MOT...LOC 2024Z 246DEG 26KT 4670 11227 $$ BRW
1 follow-up statement
000 WWUS55 KTFX 062044 SVSTFX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 244 PM MDT MON JUL 6 2009 MTC049-062100- /O.CON.KTFX.TO.W.0002.000000T0000Z-090706T2100Z/ LEWIS AND CLARK MT- 244 PM MDT MON JUL 6 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM MDT FOR SOUTH CENTRAL LEWIS AND CLARK COUNTY... AT 241 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM IS LOCATED 9 MILES EAST OF MARYSVILLE...OR 11 MILES NORTH OF HELENA...MOVING NORTHEAST AT 30 MPH. THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT MONDAY EVENING FOR WESTERN MONTANA. LAT...LON 4694 11199 4674 11179 4658 11228 4674 11239 TIME...MOT...LOC 2044Z 246DEG 26KT 4676 11207 $$ BRW
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:32 PM MDT | Special Weather Statement | TFX | Liberty | 43 min |
| Jul 5, 7:39 PM MDT | Special Weather Statement | TFX | Teton | 36 min |
| Jul 5, 8:15 PM MDT | Special Weather Statement | TFX | Liberty | 45 min |
| Jul 6, 1:15 PM MDT | Special Weather Statement | TFX | Jefferson | 45 min |
| Jul 6, 1:57 PM MDT | Special Weather Statement | TFX | Judith Basin | 48 min |
| Jul 6, 2:01 PM MDT | Special Weather Statement | TFX | Gallatin | 14 min |
| Jul 6, 2:06 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 39 min |
| Jul 6, 2:08 PM MDT | Special Weather Statement | TFX | Pondera, Teton | 37 min |
| Jul 6, 2:12 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 48 min |
| Jul 6, 2:19 PM MDT | Special Weather Statement | TFX | Silver Bow | 41 min |
| Jul 6, 2:22 PM MDT | Special Weather Statement | TFX | Madison | 53 min |
| Jul 6, 2:44 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 46 min |
| Jul 6, 2:49 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 41 min |
| Jul 6, 2:52 PM MDT | Special Weather Statement | TFX | Broadwater | 38 min |
| Jul 6, 2:54 PM MDT | Tornado Warning | TFX | Lewis and Clark | 36 min |
| Jul 6, 2:55 PM MDT | Special Weather Statement | TFX | Glacier | 35 min |
| Jul 6, 2:58 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 47 min |
| Jul 6, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 42 min |
| Jul 6, 3:06 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 54 min |
| Jul 6, 3:19 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 41 min |
| Jul 6, 3:19 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 26 min |
| Jul 6, 3:33 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 42 min |
| Jul 6, 3:35 PM MDT | Special Weather Statement | TFX | Broadwater | 40 min |
| Jul 6, 3:44 PM MDT | Special Weather Statement | TFX | Jefferson | 31 min |
| Jul 6, 3:48 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 17 min |
| Jul 6, 3:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Teton | 49 min |
| Jul 6, 3:57 PM MDT | Special Weather Statement | TFX | Judith Basin | 33 min |
| Jul 6, 3:58 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 19 min |
| Jul 6, 4:05 PM MDT | Special Weather Statement | TFX | Madison | 25 min |
| Jul 6, 4:09 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Lewis and Clark, Meagher | 22 min |
| Jul 6, 4:15 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 45 min |
| Jul 6, 4:21 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 39 min |
| Jul 6, 4:22 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Judith Basin | 3 min |
| Jul 6, 4:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 38 min |
| Jul 6, 4:38 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Gallatin, Judith Basin, Meagher | 52 min |
| Jul 6, 4:44 PM MDT | Special Weather Statement | TFX | Madison | 46 min |
| Jul 6, 4:44 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 46 min |
| Jul 6, 5:24 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 34 min |
| Jul 6, 5:33 PM MDT | Special Weather Statement | TFX | Gallatin, Madison | 42 min |
| Jul 6, 5:38 PM MDT | Special Weather Statement | TFX | Judith Basin | 52 min |
| Jul 6, 5:54 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 51 min |
Nearby
Tornado Warnings in Montana, 2009Every tornado warning in 2009Tornadoes in 2009
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.