Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 21, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jun 12, 2011, 3:36 PM MDT for Carter County, Powder River County, Montana. It was in force for 54 min. 2 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 12, 2011, 3:36 PM MDT (21:36 UTC)
- Expired
- Jun 12, 2011, 4:30 PM MDT
- In force
- 54 min
- Issued by
- NWS Billings, MT
- Area
- Storm-based polygon
Counties Carter County, MT, Powder River County, MT
The radar
The Rapid City radar (KUDX), 220 km from the middle of the area, began a volume at 21:35 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 12, 3:40 PM MDT | HAIL 4.25 | Biddle, MT | |
| Jun 12, 3:43 PM MDT | HAIL 2.75 | 1 Ese Biddle, 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 |
|---|---|---|---|
| Jun 12, 1:49 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 9.6 hours before the alert went out and 219 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
- 15 J/kg
- Mixed-layer CIN
- -237 J/kg
- Mixed-layer LCL
- 1880 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
051 WUUS55 KBYZ 122136 SVRBYZ MTC011-075-122230- /O.NEW.KBYZ.SV.W.0021.110612T2136Z-110612T2230Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BILLINGS MT 336 PM MDT SUN JUN 12 2011 THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN CARTER COUNTY IN SOUTHEAST MONTANA... SOUTHEASTERN POWDER RIVER COUNTY IN SOUTHEAST MONTANA... * UNTIL 430 PM MDT. * AT 332 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR BIDDLE...OR 23 MILES SOUTH OF BROADUS...AND MOVING NORTHEAST AT 15 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BELLE CREEK...HAMMOND AND BOYES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. && LAT...LON 4499 10540 4519 10552 4542 10497 4511 10476 TIME...MOT...LOC 2135Z 247DEG 15KT 4511 10533 $$
1 follow-up statement
387 WWUS55 KBYZ 122200 SVSBYZ SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BILLINGS MT 400 PM MDT SUN JUN 12 2011 MTC011-075-122230- /O.CON.KBYZ.SV.W.0021.000000T0000Z-110612T2230Z/ CARTER MT-POWDER RIVER MT- 400 PM MDT SUN JUN 12 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR SOUTHEASTERN POWDER RIVER AND SOUTHWESTERN CARTER COUNTIES... TRAINED WEATHER SPOTTERS REPORTED BASEBALL SIZE HAIL WITH THIS STORM NEAR BIDDLE. THIS STORM WAS LOCATED NEAR BELLE CREEK...OR 25 MILES SOUTHEAST OF BROADUS...MOVING EAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOYES AND HAMMOND THIS STORM IS ALSO DISPLAYING STRONG INDICATIOND OF A TORNADO DEVELOPING. A TORNADO WARNING IS ASSOCIATED WITH THIS STORM AND IS ALSO IN EFFECT UNTIL 430 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT SUNDAY EVENING FOR SOUTHEAST MONTANA. && LAT...LON 4542 10497 4511 10476 4499 10540 4519 10552 TIME...MOT...LOC 2158Z 258DEG 24KT 4513 10511 $$
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 6:03 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 42 min |
| Jun 11, 6:31 PM MDT | Special Weather Statement | BYZ | 59 min | |
| Jun 11, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 32 min |
| Jun 11, 7:15 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 24 min |
| Jun 12, 2:35 PM MDT | Special Weather Statement | BYZ | Powder River | 55 min |
| Jun 12, 3:21 PM MDT | Special Weather Statement | BYZ | Custer | 54 min |
| Jun 12, 3:39 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure | 54 min |
| Jun 12, 3:48 PM MDT | Tornado Warning | BYZ | Carter, Powder River | 42 min |
| Jun 12, 4:19 PM MDT | Special Weather Statement | BYZ | Stillwater | 56 min |
| Jun 12, 4:30 PM MDT | Tornado Warning | BYZ | Carter, Powder River | 45 min |
| Jun 12, 4:36 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Powder River | 54 min |
| Jun 12, 5:09 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 66 min |
| Jun 12, 5:22 PM MDT | Special Weather Statement | BYZ | Yellowstone | 53 min |
| Jun 12, 5:33 PM MDT | Special Weather Statement | BYZ | Fallon | 57 min |
| Jun 12, 5:44 PM MDT | Special Weather Statement | BYZ | Yellowstone | 61 min |
| Jun 12, 5:45 PM MDT | Tornado Warning | BYZ | Carter | 30 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.