Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 261, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jul 26, 2001, 3:12 PM MDT for Musselshell County, Montana. It was in force for 63 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 26, 2001, 3:12 PM MDT (21:12 UTC)
- Expired
- Jul 26, 2001, 4:15 PM MDT
- In force
- 63 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
County Musselshell County, MT
The radar
The Billings radar (KBLX), 73 km from the middle of the area, began a volume at 21:13 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 26, 4:00 PM MDT | Hail 0.88 | Melstone, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 26, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.2 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
- 1272 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 26, 2:20 PM MDT, 52 minutes earlier.
Area forecast discussion, Jul 26, 2:20 PM MDT, 52 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
220 PM MDT THU JUL 26 2001
.FRI AND SAT...
CONVECTION ALREADY FIRING NORTHWEST OF BILLINGS. STORMS FIRING ON
MOISTURE CONVERGENCE LINE. STRONG EAST INFLOW OF 60S DEWPOINT AIR. UPPER
WAVE KICKING INTO SOUTHWEST MONTANA AT THE MOMENT. ETA TAKES THIS WAVE
INTO NORTHEAST MONTANA THIS EVENING. TROUGH FLATTENS THE FLOW OVERNIGHT
AND NEXT UPSTREAM WAVE CRUISES NORTH. SHOULD BE AN EVENING EVENT THIS
TIME. ATMOSPHERE VERY UNSTABLE WITH LAPS CAPES 2000-4000 JKG FROM
BILLINGS EAST...AND LI'S -4 TO -8. WILL KEEP THE MENTION OF SEVERE FROM
BILLINGS EAST. PRECIPITABLE WATER AMOUNTS PROGGED AROUND 1.3 INCHES OVER
SOUTHEAST MONTANA. 1 TO 3 HOUR FLASH FLOOD GUIDANCE PRETTY LOW OVER THE
SOUTHEAST. TROPICAL MOISTURE STREAMING NORTH INTO THE SOUTHEAST...SO
WILL ISSUE A FLASH FLOOD WATCH FOR THE SOUTHEAST. CONVECTION FIRING OVER
BIG HORN COUNTY SO WILL KEEP HIGH POPS GOING FOR THE SOUTHEAST.
TROUGH MOVES EAST FRIDAY AND A SMALL SCALE RIDGE BUILDS IN BEHIND IT.
WEAK SHORTWAVES DO MOVE THROUGH THIS FLOW...BUT MOST THE SHORTWAVES
SHOULD GET BUMPED NORTH OF THE FORECAST AREA. ALSO...WAVES WILL BE
ENCOUNTERING ANTICYCLONIC FLOW. WILL BE SOME INSTABILITY TO WORK WITH
AND SOME WEAK SHEAR...SO WILL KEEP LOW POPS IN. NEXT TROUGH THEN DIGS
INTO WESTERN MONTANA SATURDAY AFTERNOON. THIS WILL SEND A STRONG COLD
FRONT INTO CENTRAL MONTANA BY 00Z SUNDAY. STRONG COMPRESSIONAL HEATING
AHEAD OF THE FRONT SHOULD ALLOW TEMPERATURES TO CLIMB INTO THE 90S.
WILL UP POPS TO SCATTERED OVER THE WEST HALF OF THE AREA AS THE FRONT
APPROACHES. THE SOUTHEAST WILL HAVE SOME CAPPING. SHEARED ENERGY COULD
BE ENOUGH LATE IN THE DAY TO SPARK A THUNDERSTORM LATE AFTERNOON...SO
WILL KEEP A LOW POP OVER THE SOUTHEAST. HUMPHREY
.SUN...MON...TUE...WED...THU...
MRF SHOWING SOME INCONSISTENCIES FROM RUN TO RUN SO WILL GO MORE IN
LINE WITH ECMWF SOLUTION. SW FLOW CONTINUES THROUGH THE FCST PERIODS
KEEPING SCT AFTN THUNDERSTORMS AND SEASONAL TEMPS IN THE GOING FCST.
A TROUGH WILL CROSS THE REGION LATE WED LOWERING HIGHS ON THU...YET
THE SW FLOW RETURNS THU FOR A RETURN TO SCATTERED AFTN THUNDERSTORMS.
PERSISTENCE SEEMS TO BE THE RULE WITH THE WEATHER PATTERN THAT HAS
CHANGED LITTLE OVER THE LAST FEW WEEKS. SPRINGER
FRI SAT SUN MON TUE WED THU
-----------------------------------------------------------
BIL 058/089 061/094 059/084 062/087 060/085 058/085 054/083
42/T 23/T 43/T 33/T 33/T 33/T 33/T
LVM 054/087 057/089 056/081 059/084 057/082 057/082 053/082
32/T 24/T 43/T 33/T 33/T 33/T 33/T
HDN 058/090 060/095 057/086 060/089 058/087 056/085 053/083
42/T 23/T 43/T 33/T 33/T 33/T 33/T
MLS 062/089 062/097 064/087 064/090 062/088 060/086 058/086
62/T 22/T 43/T 33/T 33/T 33/T 33/T
4BQ 061/089 061/097 063/087 063/089 061/087 059/087 059/085
62/T 22/T 43/T 33/T 33/T 33/T 33/T
BHK 060/088 060/096 060/084 060/087 059/087 057/085 055/085
62/T 22/T 43/T 33/T 33/T 33/T 33/T
SHR 058/089 058/09/4 057/085 059/088 057/086 055/086 051/083
42/T 23/T 43/T 33/T 33/T 33/T 33/TThe office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:42 PM MDT | Tornado Warning | BYZ | Fallon | 63 min |
| Jul 25, 7:00 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 30 min |
| Jul 25, 7:30 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 30 min |
| Jul 25, 7:45 PM MDT | Tornado Warning | BYZ | Fallon | 55 min |
| Jul 25, 8:00 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 60 min |
| Jul 26, 11:00 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Wheatland | 60 min |
| Jul 26, 12:00 PM MDT | Flash Flood Warning | BYZ | Golden Valley | 3 hr |
| Jul 26, 12:00 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 60 min |
| Jul 26, 12:42 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 63 min |
| Jul 26, 12:59 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 61 min |
| Jul 26, 1:46 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 59 min |
| Jul 26, 2:26 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 64 min |
| Jul 26, 2:30 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 60 min |
| Jul 26, 3:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 93 min |
| Jul 26, 3:30 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 60 min |
| Jul 26, 3:34 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 56 min |
| Jul 26, 3:37 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 53 min |
| Jul 26, 4:15 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 60 min |
| Jul 26, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 60 min |
| Jul 26, 5:18 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 57 min |
| Jul 26, 5:52 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 58 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.