Alert archive / Montana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 89, NWS Billings, MT

July 10, 1997Rosebud County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 10, 1997, 9:20 PM MDT for Rosebud County, Montana. It was in force for 65 min. 2 reports 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 10, 1997, 9:20 PM MDT (03:20 UTC)
Expired: Jul 10, 1997, 10:25 PM MDT
In force: 65 min
Issued by: NWS Billings, MT
Area: Whole counties

County Rosebud County, MT

The radar

The Billings radar (KBLX), 151 km from the middle of the area, began a volume at 03:24 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 10, 9:40 PM MDT	Hail 0.75	Forsyth, MT
Jul 10, 10:30 PM MDT	Hail 0.88	Colstrip, 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, 3.3 hours before the alert went out and 221 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 316 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1932 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

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 10, 8:35 PM MDT, 45 minutes earlier.

Area forecast discussion, Jul 10, 8:35 PM MDT, 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
830 PM MDT THU JUL 10 1997

MAIN AREA OF SEVERE WEATHER IS IN THE DAKOTAS IN AREA OF BEST
INSTABILITY. UPPER LEVEL TROF PUSHING IN WESTERN CWA STILL DRIVING
SHOWERS/STRONG THUNDERSTORMS. SE CAUGHT IN SUBSIDENCE BETWEEN TWO
SYSTEMS. SEVERE THUNDERSTORM WATCH CANCELLED FAR EAST AND OTHER WATCH
SET TO EXPIRE AT 900 PM. PER GTF CONFERENCE CALL...GTF WILL HANDLE ALL
STATEMENTS. WILL BUMP DOWN POPS EAST AND CENTRAL AND CHANGE SOME
WORDING SECOND PERIOD. TEMPS LOOK IN BALLPARK...BUT WILL BUMP DOWN IN
A FEW SPOTS. SCARLETT

BIL TW 055/072 052/073 052 574755
LVM .. 050/072 050/072 ... 577755
HDN .. 053/074 054/075 ... 574755
MLS .. 059z/074 057/076 ... 573733
4BQ .. 057/075 057/076 ... 573733
BHK .. 058/074 058/077 ... 572733
SHR TW 056/072 048/071 044 574744

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:16 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	64 min
Jul 10, 9:26 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure	64 min
Jul 10, 10:28 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	62 min
Jul 10, 10:45 PM MDT	Tornado Warning	BYZ	Rosebud	35 min
Jul 10, 11:33 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	62 min

Nearby

Severe Thunderstorm Warnings in Montana, 1997 Every severe thunderstorm warning in 1997

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.