Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 34, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jun 17, 2001, 7:36 PM MDT for Carbon County, Montana. It was in force for 24 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
- Jun 17, 2001, 7:36 PM MDT (01:36 UTC)
- Expired
- Jun 17, 2001, 8:00 PM MDT
- In force
- 24 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
County Carbon County, MT
The radar
The Billings radar (KBLX), 77 km from the middle of the area, began a volume at 01:40 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 17, 7:40 PM MDT | Hail 0.75 | Joliet, 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 nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.6 hours before the alert went out and 381 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
- 2571 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 47 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 Jun 17, 2:45 PM MDT, 4 hours 51 minutes earlier.
Area forecast discussion, Jun 17, 2:45 PM MDT, 4 hours 51 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
245 PM MDT SUN JUN 17 2001
.MON AND TUE...
TWO PROBLEM AREAS FOR TONIGHT. FIRST (EARLIER) IN THE EAST...GOOD
SOUTHEAST FLOW HAS KEPT DEWPOINTS IN LOWER TO MID 50S IN EASTERN ZONES
AHEAD OF WEAK SURFACE TROUGH AS LOW DEEPENS OVER WYOMING. FAIR SHEAR
WITH EASTERLY LOW LEVEL FLOW AND MID LEVEL WESTERLY WINDS INCREASING TO
50 KNOTS. SHOULD BE A CHANCE OF SEVERE EARLY WITH ACTIVITY SHIFTING
FURTHER EAST THIS EVENING. IN THE WEST...WATER VAPOR SHOWING VERY STRONG
WAVE MOVING ONTO PACIFIC NORTHWEST COAST. NEITHER MODEL SEEMS TO BE
STRONG ENOUGH WITH IT. JET ASSOCIATED WITH IT NOSES INTO SOUTHWEST
MONTANA BY 06Z WITH GOOD DIVERGENCE PROGGED BY ETA/AVN OVER WESTERN
ZONES BY 06Z. AVN THEN MOVES STRONG AREA OF 700 MB OMEGA ACROSS ENTIRE
CWA TONIGHT...LOOKING LIKE AN MCC SIGNATURE. ETA MUCH WEAKER WITH
THIS ENERGY AS IT MOVES INTO EASTERN MONTANA LATER TONIGHT. WILL LEAN TO
STRONGER AVN...AND GO WITH LIKELY POPS ACROSS CWA TONIGHT.
MONDAY...WEAK TROUGHING GETS CARVED OUT OVER AREA...WITH ANOTHER WAVE
DROPPING INTO NORTHEAST MONTANA. SURFACE HIGH SETTLES INTO AREA. SOME
INSTABILITY AROUND...CYCLONIC FLOW AND LOW CONVECTIVE TEMPS WILL KEEP
SHOWERS GOING. WILL ALSO BE COOLER.
TUESDAY...MORE SHORTWAVE ENERGY DROPS INTO WEAK TROUGHING OVER
MONTANA...ONE WHICH PUSHES ACROSS SOUTHERN MONTANA. ALTHOUGH ATMOSPHERE
MORE STABLE...WILL COVER WITH ISOLATED POPS. RASCH
.WED...THU...FRI...SAT...SUN...
SHOWERS WILL LINGER ACROSS SOUTHEAST MONTANA TUESDAY NIGHT AND
WEDNESDAY AS A SHORTWAVE IN NORTHWEST FLOW AFFECTS THAT AREA. AFTER
THAT...A STRONG UPPER LEVEL RIDGE WILL BUILD OVER MONTANA...BRINGING
HOT AND DRY WEATHER TO THE AREA THURSDAY AND FRIDAY. THE RIDGE AXIS
WILL MOVE INTO EASTERN MONTANA SATURDAY AND INTO THE DAKOTAS SUNDAY...
ALLOWING THUNDERSTORMS TO DEVELOP ACROSS THE AREA WEST OF THE AXIS.
MIDDENDORF
MON TUE WED THU FRI SAT SUN
-----------------------------------------------------------
BIL 050/069 047/071 049/078 055/086 059/092 060/090 060/088
73/T 22/W 00/U 00/U 00/U 03/T 33/T
LVM 045/067 043/070 043/077 048/085 052/089 055/088 053/085
83/T 32/W 00/U 00/U 00/U 03/T 33/T
HDN 048/070 045/072 045/082 051/089 055/095 057/094 057/092
73/T 22/W 00/U 00/U 00/U 03/T 33/T
MLS 054/064 048/073 049/077 055/087 059/092 062/094 062/094
66/T 40/B 22/B 00/U 00/U 02/B 23/T
4BQ 053/063 047/072 047/075 053/085 057/090 060/092 060/092
66/T 40/B 22/B 00/U 00/U 02/B 23/T
BHK 052/062 046/071 045/075 050/085 055/090 058/092 058/092
66/T 40/B 22/B 00/U 00/U 02/B 23/T
SHR 048/071 043/072 043/077 048/085 052/091 055/091 055/089
63/T 20/B 00/U 00/U 00/U 03/T 33/TThe office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Sweet Grass | 62 min |
| Jun 18, 12:11 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 49 min |
| Jun 18, 12:44 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 46 min |
| Jun 18, 1:30 AM MDT | Tornado Warning | BYZ | Custer, Rosebud | 30 min |
| Jun 18, 1:49 AM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 41 min |
| Jun 18, 1:59 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 31 min |
| Jun 18, 2:26 AM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 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.