Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 1, 2011, 11:45 PM MDT for Blaine County, Chouteau County, Hill County, Montana. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2011, 11:45 PM MDT (05:45 UTC)
- Expired
- Jun 2, 2011, 12:35 AM MDT
- In force
- 50 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Blaine County, MT, Chouteau County, MT, Hill County, MT
The radar
The Great Falls radar (KTFX), 181 km from the middle of the area, began a volume at 05:49 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.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 5.8 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
- 32 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1234 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
644 WUUS55 KTFX 020545 SVRTFX MTC005-015-041-020700- /O.NEW.KTFX.SV.W.0002.110602T0545Z-110602T0700Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 1145 PM MDT WED JUN 1 2011 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN BLAINE COUNTY IN NORTH CENTRAL MONTANA... THIS INCLUDES THE CITY OF CHINOOK... NORTHEASTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA... SOUTHEASTERN HILL COUNTY IN NORTH CENTRAL MONTANA... * UNTIL 100 AM MDT. * AT 1142 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 24 MILES EAST OF BIG SANDY...MOVING NORTHEAST AT 30 MPH. * LOCATIONS IN THE WARNING INCLUDE CHINOOK...ALONG WITH LOCATIONS ALONG HIGHWAY 2 FROM HARLEM TO HAVRE. HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH ARE LIKELY WITH THIS STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4868 10932 4831 10866 4795 10959 4811 10988 TIME...MOT...LOC 0545Z 235DEG 28KT 4811 10958 $$
2 follow-up statements
789 WWUS55 KTFX 020614 SVSTFX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 1214 AM MDT THU JUN 2 2011 MTC015-041-020622- /O.CAN.KTFX.SV.W.0002.000000T0000Z-110602T0700Z/ CHOUTEAU MT-HILL MT- 1214 AM MDT THU JUN 2 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HILL AND NORTHEASTERN CHOUTEAU COUNTIES IS CANCELLED... THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. LAT...LON 4815 10929 4826 10951 4866 10928 4838 10878 TIME...MOT...LOC 0612Z 217DEG 35KT 4827 10932 $$ MTC005-020700- /O.CON.KTFX.SV.W.0002.000000T0000Z-110602T0700Z/ BLAINE MT- 1214 AM MDT THU JUN 2 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM MDT FOR CENTRAL BLAINE COUNTY... AT 1212 AM 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 LLOYD...OR 22 MILES SOUTH OF CHINOOK...MOVING NORTHEAST AT 40 MPH. THE SEVERE THUNDERSTORM WILL AFFECT AREAS NEAR CHINOOK AROUND 1230 AM...ALONG WITH LOCATIONS ALONG HIGHWAY 2 FROM HARLEM TO CHINOOK. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4815 10929 4826 10951 4866 10928 4838 10878 TIME...MOT...LOC 0612Z 217DEG 35KT 4827 10932 $$
446 WWUS55 KTFX 020635 SVSTFX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 1235 AM MDT THU JUN 2 2011 MTC005-020645- /O.CAN.KTFX.SV.W.0002.000000T0000Z-110602T0700Z/ BLAINE MT- 1235 AM MDT THU JUN 2 2011 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BLAINE COUNTY IS CANCELLED... NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER SEVERE...THUS THE WARNING HAS BEEN CANCELLED. LAT...LON 4815 10929 4826 10951 4866 10928 4838 10878 TIME...MOT...LOC 0635Z 217DEG 35KT 4845 10911 $$ BRUSDA
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 8:00 PM MDT | Special Weather Statement | TFX | Chouteau | 60 min |
| Jun 1, 9:30 PM MDT | Special Weather Statement | TFX | Chouteau | 60 min |
| Jun 1, 9:46 PM MDT | Special Weather Statement | TFX | Judith Basin | 59 min |
| Jun 1, 10:22 PM MDT | Special Weather Statement | TFX | Judith Basin | 38 min |
| Jun 1, 11:05 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 55 min |
| Jun 1, 11:27 PM MDT | Special Weather Statement | TFX | Blaine | 63 min |
| Jun 2, 12:51 AM MDT | Special Weather Statement | TFX | Blaine | 54 min |
| Jun 2, 1:59 AM MDT | Special Weather Statement | TFX | Blaine | 76 min |
| Jun 2, 3:05 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 40 min |
| Jun 2, 4:01 AM MDT | Special Weather Statement | TFX | Cascade | 44 min |
| Jun 2, 4:34 AM MDT | Special Weather Statement | TFX | Cascade, Chouteau | 56 min |
| Jun 2, 4:46 AM MDT | Special Weather Statement | TFX | Cascade | 44 min |
| Jun 2, 5:18 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 57 min |
| Jun 2, 5:30 AM MDT | Special Weather Statement | TFX | Liberty | 30 min |
| Jun 2, 6:16 AM MDT | Special Weather Statement | TFX | Hill, Liberty | 74 min |
| Jun 2, 7:09 AM MDT | Special Weather Statement | TFX | Blaine | 51 min |
| Jun 2, 7:31 AM MDT | Severe Thunderstorm Warning | TFX | Blaine | 44 min |
| Jun 2, 12:43 PM MDT | Special Weather Statement | TFX | Fergus | 47 min |
| Jun 2, 12:54 PM MDT | Special Weather Statement | TFX | Blaine | 51 min |
| Jun 2, 1:25 PM MDT | Special Weather Statement | TFX | Blaine | 35 min |
| Jun 2, 1:57 PM MDT | High Wind Warning | TFX | 5 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.