Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 4, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at May 10, 2001, 3:35 PM MDT for Carter County, Powder River County, Montana. It was in force for 55 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
- May 10, 2001, 3:35 PM MDT (21:35 UTC)
- Expired
- May 10, 2001, 4:30 PM MDT
- In force
- 55 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
Counties Carter County, MT, Powder River County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 4:05 PM MDT | Hail 0.75 | Broadus, MT | 0.75 hail reported by spotter |
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 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 May 10, 2:30 PM MDT, 1 hour 5 minutes earlier.
Area forecast discussion, May 10, 2:30 PM MDT, 1 hour 5 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
230 PM MDT THU MAY 10 2001
.FRI AND SAT...
A FEW PULSE THUNDERSTORMS WERE MOVING ACROSS THE SOUTHEAST THIS
AFTERNOON. SPOTTERS HAVE REPORTED BRIEF DOWN-POURS AND GUSTY WINDS WITH
CELLS. FREEZING LEVELS ARE NEAR 8 THOUSAND FEET SO SMALL HAIL IS
POSSIBLE WITH CELLS AS PRECIPITATION TOPS HAVE EXTENDED UPWARDS AROUND
20 THOUSAND FEET. WATER VAPOR IMAGERY SHOWS AN AMPLIFYING UPPER TROUGH
PROGRESSING ACROSS EASTERN MONTANA AND THIS WAS ACTING AS THE TRIGGER.
CAPES ARE LOW 400-600J/KG IN THE SOUTHEAST BUT LAPSE RATES REMAIN 7-
8C/KM. ENOUGH INSTABILITY THEREFORE REMAINS TO TRIGGER A FEW MORE
THUNDERSTORMS DURING THE AFTERNOON AND EARLY THIS EVENING. AS THE UPPER
TROUGH EXITS THE STATE TONIGHT...NIGHTTIME COOLING WILL SET IN AND THE
ATMOSPHERE WILL STABILIZE. PRESENTLY OVER THE CENTRAL AND WESTERN
AREA...NORTHWEST WINDS WERE ALREADY TAKING SHAPE WITH A FEW LINGERING
SHOWERS.
AN UPPER RIDGE BUILDS IN TONIGHT THROUGH SATURDAY FOR DRIER AND MUCH
WARMER CONDITIONS DURING THE SHORT TERM. MID LEVEL COLD AIR ADVECTION
SHUTS OFF TONIGHT AND WARM AIR ADVECTION BEGINS IN ERNEST FRIDAY...SO IT
WILL FEEL NOTICEABLY WARMER...ESPECIALLY SATURDAY. ETA FORECASTS 700MB
TEMPERATURES TO WARM UP TO AROUND +5 CELSIUS FRIDAY AND +10 CELSIUS
SATURDAY. MIXING THESE TO THE SURFACE MEANS MAXIMUM TEMPERATURES WILL
APPROACH 80F FRIDAY AND 90F SATURDAY. THIS IS WELL ABOVE NORMAL. RECORDS
FOR SATURDAY ARE...BILLINGS 94F...MILES CITY 96F AND SHERIDAN 95F. IT/LL
BE CLOSE BUT WILL NOT HIGHLIGHT. CANEPA
.SUN...MON...TUE...WED...THU...
PACIFIC SYSTEM BEGINS TO FLATTEN THE DOMINATING RIDGE WITH
TEMPERATURES COOLING BOTH SUNDAY AND EVEN MORE MONDAY AS A
COOL FRONT MOVES THROUGH THE AREA. BEST CHANCES FOR SHOWERS
THIS EXTENDED PERIOD WILL BE AS THE FRONT MOVES THROUGH ON
MONDAY. THE RIDGE SETS UP WEST OF MONTANA THE REMAINDER OF
THE EXTENDED PERIOD WITH TEMPERATURES ONLY INTO THE 70S AS
COOLER CANADIAN AIR MOVES INTO THE AREA EAST OF THE DIVIDE
WITH A NORTHWEST FLOW ALOFT ACROSS THE NORTHERN ROCKIES.
THORICHT
FRI SAT SUN MON TUE WED THU
-----------------------------------------------------------
BIL 042/080 053/090 051/084 049/077 046/074 046/074 045/072
20/U 00/U 22/B 33/W 22/B 22/B 22/B
LVM 037/082 051/091 049/082 048/075 044/072 045/072 044/070
00/U 00/U 22/B 33/W 22/B 22/B 22/B
HDN 038/081 051/091 048/085 047/078 045/075 045/075 044/073
20/U 00/U 22/B 33/W 22/B 22/B 22/B
MLS 042/079 050/090 053/086 053/079 048/075 046/074 045/074
60/U 00/U 22/B 33/W 11/B 11/B 22/B
4BQ 043/078 049/088 051/083 052/078 045/073 044/072 043/072
60/U 00/U 22/B 33/W 11/B 11/B 22/B
BHK 040/077 047/087 050/081 050/076 044/072 045/072 042/070
60/U 00/U 22/B 33/W 11/B 11/B 22/B
SHR 035/079 046/090 049/082 048/075 044/074 043/073 042/071
20/U 00/U 22/B 33/W 22/B 22/B 22/BNearby
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.