Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 300, NWS Billings, MT

July 28, 2001Custer County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 28, 2001, 7:30 PM MDT for Custer County, Montana. It was in force for 45 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 28, 2001, 7:30 PM MDT (01:30 UTC)
Expired: Jul 28, 2001, 8:15 PM MDT
In force: 45 min
Issued by: NWS Billings, MT
Area: Whole counties

County Custer County, MT

The radar

The Glasgow radar (KGGW), 231 km from the middle of the area, began a volume at 01:32 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 28, 8:00 PM MDT	Hail 0.75	Ismay, 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 28, 3:00 PM MDT	Tornado Watch	SPC	6 hr

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 28, 2:05 PM MDT, 5 hours 25 minutes earlier.

Area forecast discussion, Jul 28, 2:05 PM MDT, 5 hours 25 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
205 PM MDT SAT JUL 28 2001

.SUN AND MON...
ACTIVE EVENING SETTING UP. MODELS FAIRLY SIMILAR IN TROUGH PLACEMENT.
THE ETA IS A LITTLE SLOWER AND PREFERRED BASED ON THE TROUGH BECOMING
NEGATIVELY TILTED. STRONG COLD FRONT MOVING INTO WESTERN MONTANA AT THE
MOMENT. SURFACE TROUGH AHEAD OF THE FRONT SEPARATES QUITE A DEWPOINT
DIFFERENCE. FRONT SHOULD GET INTO THE LIVINGSTON AREA AROUND 00Z AND
THEN SLIDE INTO THE SOUTHEAST BY MIDNIGHT. CAPES AROUND 1500-3500 JKG
FROM SOUTH CENTRAL MONTANA INTO THE SOUTHEAST. SHEAR POWERFUL OVER THE
SOUTHEAST. SEVERE MULTICELLULAR STORMS EXPECTED OVER SOUTH CENTRAL
MONTANA WITH SUPERCELLS OVER THE SOUTHEAST. WILL MENTION SEVERE. SUNDAY
SHOULD BE FAIRLY QUIET AS THE FRONT CLEARS THIS OUT. STILL SOUTHWEST
FLOW HOWEVER LEFT OVER AT 500MB. FRONT LAYS DOWN OVER WYOMING WITH A
TONGUE OF INSTABILITY PUSHING BACK ALONG THE MOUNTAINS. WAVES PROGGED TO
CRUISE NORTH OF THE AREA AS NEXT UPSTREAM TROUGH DIGS OVER THE
NORTHWEST. WILL INCLUDE A LOW POP OVER THE MOUNTAINS AS RIGHT REAR QUAD
OF THE JET TO BE IN THIS AREA AIDING ASCENT. THE SOUTHEAST SHOULD BE
FAIRLY STABLE FOR A CHANGE BEHIND THE FRONT. MORE MOISTURE GETS DRAWN IN
FROM MONDAY FOR LOW POPS ALL AROUND. TEMPERATURES WILL BE DRAMATICALLY
COOLER THE NEXT TWO DAYS. WILL NOT BE AGGRESSIVE IN THE COOLING THE
GUIDANCE...AS FRONT SHOULD NOT DRIVE THAT FAR SOUTH AND BEST COOLING
WILL BE NORTH. HUMPHREY

.TUE...WED...THU...FRI...SAT...
NEW AVN RUN IS KEEPING QUITE A BIT OF TROUGHINESS OVER THE AREA ON
TUESDAY WITH PRECIPITABLE H20S STILL RUNNING FROM .75 TO 1.00. THUS
THUNDER STAYS IN THE FORECAST WITH TEMPS JUST A FEW DEGREES WARMER THAN
MONDAY. WEDNESDAY WILL STILL SEE ISOLATED ACTIVITY BUT SURFACE PATTERN
IS INDICATED RETURN MOISTURE MAY BE CUTOFF FROM REACHING THE AREA AS
SURFACE PRESSURE FAVORS THE AREA. SOUTHWEST FLOW REDEVELOPS LATER IN THE
EXTENDED AND THE SURFACE PATTERN BECOMES A BIT MORE FAVORABLE FOR RETURN
MOISTURE. WILL GO WITH A MOSTLY DRY FORECAST FOR WESTERN SECTIONS ON
WEDNESDAY AND THE WHOLE AREA ON THURSDAY...OTHERWISE MOST AFTERNOONS AND
EVENINGS WILL CONTINUE THE SUMMER OF THUNDER. BORSUM

    SUN     MON     TUE     WED     THU     FRI     SAT
-----------------------------------------------------------
BIL 056/082 054/082 056/080 058/085 060/088 060/088 055/088
    40/T    22/T    33/T    32/B    22/B    33/T    33/T
LVM 048/079 046/079 050/078 052/083 055/086 055/086 055/086
    32/T    23/T    33/T    32/B    22/B    33/T    33/T
HDN 054/082 052/082 054/082 056/087 058/090 058/090 058/090
    40/T    22/T    33/T    32/B    22/B    33/T    33/T
MLS 062/082 058/082 060/085 062/090 062/092 062/092 059/092
    40/B    22/T    33/T    33/T    22/B    33/T    33/T
4BQ 062/082 058/082 060/085 062/090 062/092 062/092 062/092
    60/B    02/T    33/T    33/T    22/B    33/T    33/T
BHK 061/081 057/081 058/084 060/089 060/091 060/091 060/091
    60/B    02/T    33/T    33/T    22/B    33/T    33/T
SHR 054/082 050/084 052/083 054/088 057/090 057/092 052/092
    32/T    23/T    33/T    33/B    22/B    33/T    33/T

The office that day

Everything else NWS Billings, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 6:40 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	60 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001 Every 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; radar from the NEXRAD Level II archive.