Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 13, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 23, 2011, 3:44 PM MDT for Cascade County, Chouteau County, Teton County, Montana. It was in force for 61 min. 3 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
- Jun 23, 2011, 3:44 PM MDT (21:44 UTC)
- Expired
- Jun 23, 2011, 4:45 PM MDT
- In force
- 61 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Cascade County, MT, Chouteau County, MT, Teton County, MT
The radar
The Great Falls radar (KTFX), 34 km from the middle of the area, began a volume at 21:45 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 23, 3:45 PM MDT | HAIL 0.75 | 1 Nnw Fort Shaw, MT | HAIIL 1 2 TO 3 4 INCH AND WINDS 40-50 MPH AND VERY HEAVY RAIN |
| Jun 23, 3:55 PM MDT | TSTM WND GST 65 | 4 Sw Power, MT | WINDS ESTIMATED AT 60-70 MPH AT ONSET OF STORM WITH BREIF HEAVY RAIN AND PEA SIZED HAIL |
| Jun 23, 4:00 PM MDT | TSTM WND DMG | Great Falls, MT | A METAL ROOF WAS BLOWN OFF A TRAILER OR SHED IN THE NORTHERN PORTION OF GREAT FALLS. THE ROOF MADE CONTACT WITH A POWER LINE AND WITNESSES REPORTED THAT IT TRIGGERED SOME SPARKING. NO INJURIES OR OTHER DAMAGE REPORTED. REPORTED BY KRTV NEWS STATION. |
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 |
|---|---|---|---|
| Jun 23, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.7 hours before the alert went out and 61 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
- 4 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 2315 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
969 WUUS55 KTFX 232144 SVRTFX MTC013-015-099-232245- /O.NEW.KTFX.SV.W.0013.110623T2144Z-110623T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 344 PM MDT THU JUN 23 2011 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CASCADE COUNTY IN CENTRAL MONTANA... THIS INCLUDES THE CITY OF GREAT FALLS... WESTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA... SOUTHEASTERN TETON COUNTY IN NORTH CENTRAL MONTANA... * UNTIL 445 PM MDT * AT 340 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTH OF POWER...MOVING EAST AT 40 MPH. * LOCATIONS IN THE WARNING INCLUDE BLACK EAGLE...FAIRFIELD...FORT SHAW...GREAT FALLS...HIGHWOOD AND POWER. HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 60 MPH ARE LIKELY WITH THIS STORM. HAIL UP TO THE SIZE OF GOLF BALLS IN DIAMETER HAS BEEN REPORTED IN FORT SHAW WITH THIS STORM. IF YOU ARE IN THE PATH OF THIS STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING FOR WESTERN MONTANA. && LAT...LON 4808 11089 4755 11070 4735 11179 4772 11212 TIME...MOT...LOC 2143Z 254DEG 41KT 4761 11162 $$ HOENISCH
2 follow-up statements
813 WWUS55 KTFX 232219 SVSTFX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 419 PM MDT THU JUN 23 2011 MTC013-015-099-232245- /O.CON.KTFX.SV.W.0013.000000T0000Z-110623T2245Z/ CASCADE MT-CHOUTEAU MT-TETON MT- 419 PM MDT THU JUN 23 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR SOUTHEASTERN TETON...WESTERN CHOUTEAU AND NORTHERN CASCADE COUNTIES... AT 415 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR FLOWEREE...OR 16 MILES NORTHEAST OF GREAT FALLS...MOVING EAST AT 40 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CARTER AND HIGHWOOD PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING FOR WESTERN MONTANA. LAT...LON 4808 11089 4755 11070 4735 11179 4772 11212 TIME...MOT...LOC 2218Z 254DEG 41KT 4771 11105 $$ HOENISCH
470 WWUS55 KTFX 232243 SVSTFX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 443 PM MDT THU JUN 23 2011 MTC013-015-099-232253- /O.EXP.KTFX.SV.W.0013.000000T0000Z-110623T2245Z/ CASCADE MT-CHOUTEAU MT-TETON MT- 443 PM MDT THU JUN 23 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TETON...WESTERN CHOUTEAU AND NORTHERN CASCADE COUNTIES WILL EXPIRE AT 445 PM MDT... RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS TO AROUND 50MPH WERE STILL POSSIBLE FROM THE THUNDERSTORM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING FOR WESTERN MONTANA. LAT...LON 4808 11089 4755 11070 4735 11179 4772 11212 TIME...MOT...LOC 2243Z 254DEG 41KT 4778 11064 $$ HOENISCH
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 2:57 AM MDT | Special Weather Statement | TFX | Glacier | 48 min |
| Jun 23, 2:09 PM MDT | Special Weather Statement | TFX | Teton | 51 min |
| Jun 23, 2:38 PM MDT | Special Weather Statement | TFX | Pondera | 52 min |
| Jun 23, 2:55 PM MDT | Special Weather Statement | TFX | Teton | 50 min |
| Jun 23, 2:56 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 64 min |
| Jun 23, 3:01 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 44 min |
| Jun 23, 4:08 PM MDT | Special Weather Statement | TFX | Judith Basin | 52 min |
| Jun 23, 5:12 PM MDT | Special Weather Statement | TFX | Chouteau, Hill | 63 min |
| Jun 23, 5:41 PM MDT | Special Weather Statement | TFX | Fergus | 49 min |
| Jun 23, 5:54 PM MDT | Special Weather Statement | TFX | Gallatin | 36 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm warning in 2011
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.