Alert archive / Montana / Special Weather Statements in 2011
Special Weather Statement, NWS Billings, MT
NWS Billings, MT issued this special weather statement at Aug 21, 2011, 9:10 PM MDT for Custer County, Montana. It was in force for 65 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
- Aug 21, 2011, 9:10 PM MDT (03:10 UTC)
- Expired
- Aug 21, 2011, 10:15 PM MDT
- In force
- 65 min
- Issued by
- NWS Billings, MT
County Custer County, MT
The radar
The Glasgow radar (KGGW), 197 km from the middle of the area, began a volume at 03:14 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
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.2 hours before the alert went out and 198 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3890 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
120
WWUS85 KBYZ 220310
SPSBYZ
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
910 PM MDT SUN AUG 21 2011
MTZ032-220415-
CUSTER MT-
910 PM MDT SUN AUG 21 2011
...SIGNIFICANT WEATHER ADVISORY FOR CUSTER COUNTY UNTIL 1015 PM
MDT...
AT 908 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 11 MILES NORTHWEST OF MILES CITY...MOVING EAST AT
30 MPH.
WIND GUSTS OF 50 TO 55 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
FREQUENT DANGEROUS LIGHTNING.
THIS STORM WILL BE NEAR...
MILES CITY AROUND 915 PM MDT.
TUSLER AND MURN AROUND 925 PM MDT.
KINSEY AROUND 935 PM MDT.
SHIRLEY AND BONFIELD AROUND 945 PM MDT.
LOCATE AROUND 1005 PM MDT.
LAT...LON 4684 10562 4676 10561 4674 10556 4667 10556
4666 10549 4658 10543 4657 10525 4655 10522
4655 10498 4582 10500 4584 10611 4657 10613
4682 10612 4687 10608
TIME...MOT...LOC 0310Z 262DEG 27KT 4655 10593
$$The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 6:33 PM MDT | Special Weather Statement | BYZ | Big Horn, Treasure | 57 min |
| Aug 21, 7:23 PM MDT | Special Weather Statement | BYZ | Big Horn | 67 min |
| Aug 21, 7:33 PM MDT | Special Weather Statement | BYZ | 57 min | |
| Aug 21, 8:28 PM MDT | Special Weather Statement | BYZ | 62 min | |
| Aug 21, 8:30 PM MDT | Special Weather Statement | BYZ | Prairie | 60 min |
| Aug 21, 10:16 PM MDT | Special Weather Statement | BYZ | Fallon | 59 min |
| Aug 21, 10:19 PM MDT | Special Weather Statement | BYZ | Carter | 56 min |
| Aug 21, 11:16 PM MDT | Special Weather Statement | BYZ | Carter | 44 min |
| Aug 22, 2:39 PM MDT | Red Flag Warning | BYZ | Big Horn, Carter, Custer, Fallon, Golden Valley, Musselshell and 7 more | 30 hr |
Nearby
Special Weather Statements in Montana, 2011Every special weather statement 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.