Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 56, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jun 27, 2001, 2:55 PM MDT for Custer County, Montana. It was in force for 35 min. 3 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
- Jun 27, 2001, 2:55 PM MDT (20:55 UTC)
- Expired
- Jun 27, 2001, 3:30 PM MDT
- In force
- 35 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 21:10 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 27, 2:55 PM MDT | Hail 0.75 | Ismay, MT | |
| Jun 27, 3:00 PM MDT | Hail 0.88 | Ismay, MT | |
| Jun 27, 3:35 PM MDT | Hail 1.75 | 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 |
|---|---|---|---|
| Jun 27, 2:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.9 hours before the alert went out and 322 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
- 141 J/kg
- Mixed-layer CIN
- -355 J/kg
- Mixed-layer LCL
- 1892 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- 3 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 27, 2:30 PM MDT, 25 minutes earlier.
Area forecast discussion, Jun 27, 2:30 PM MDT, 25 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
230 PM MDT WED JUN 27 2001
...SEVERE THUNDERSTORM WATCH EASTERN HALF COUNTY WARNING AREA UNTIL
900 PM....
.THU AND FRI...
UPPER LEVEL DISTURBANCE IN WYOMING TO ROTATE INTO SOUTHERN MONTANA THIS
AFTERNOON THEN INTO SOUTHEAST MONTANA TONIGHT. ABUNDANT LOW LEVEL
MOISTURE BEGINNING TO DEVELOP CUMULUS CLOUDS IN THE CLEAR AIR SOUTH OF
THE CENTRAL MONTANA CLOUD MASS WITH LIFTED INDICES BECOMING MORE
NEGATIVE WITH TIME. SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FROM
20Z TO 03Z FOR THE EASTERN HALF OF BILLINGS CWA THROUGH 900 PM FOR
HAIL AND STRONG WINDS. MODELS INDICATE THAT THERE WILL BE AREAS OF
LOCALLY HEAVY RAIN AS WELL. WEST COAST COOL FRONT TO MOVE INTO WESTERN
MONTANA BY MORNING BRINGING COOLER TEMPERATURES AND DIMINISHED CHANCES
OF SEVERE WEATHER. THORICHT
.SAT...SUN...MON...TUE...WED...
THE BEST CHANCE FOR PRECIPITATION DURING THE EXTENDED PERIOD WILL BE
SUNDAY AND SUNDAY EVENING. STRONG SHORTWAVE AND SURFACE TROF WILL MOVE
ACROSS THE FORECAST AREA ON THAT DAY...THUS THE POTENTIAL FOR
THUNDERSTORMS WILL BE THE GREATEST ON THAT DAY. UNTIL THE SURFACE
TROF MOVES THROUGH...HOT CONDITIONS WILL PREVAIL ACROSS THE AREA.
SURFACE HIGH PRESSURE WILL MOVE INTO EASTERN MONTANA BY MONDAY...
BRINGING COOLER AND DRY WEATHER TO THE AREA. MIDDENDORF
THU FRI SAT SUN MON TUE WED
-----------------------------------------------------------
BIL 062/086 060/083 062/093 062/093 058/082 053/082 057/084
33/T 23/T 22/B 23/T 30/B 00/B 00/B
LVM 057/083 056/081 055/090 055/088 055/078 046/080 050/082
34/T 23/T 22/B 23/T 30/B 00/B 00/B
HDN 059/089 058/084 060/094 060/094 059/085 050/085 053/087
33/T 23/T 22/B 23/T 30/B 00/B 00/B
MLS 063/089 062/086 063/095 064/095 061/085 054/085 058/087
32/T 23/T 22/B 23/T 30/B 00/B 00/B
4BQ 062/088 061/087 064/095 063/095 060/083 052/083 056/085
32/T 23/T 22/B 23/T 30/B 00/B 00/B
BHK 060/086 060/088 061/095 062/093 060/081 050/081 055/083
32/T 23/T 22/B 23/T 30/B 00/B 00/B
SHR 059/087 055/085 055/092 055/094 055/081 047/081 050/083
33/T 22/T 22/B 23/T 30/B 00/B 00/BThe office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| Jun 26, 7:53 PM MDT | Tornado Warning | BYZ | Yellowstone | 37 min |
| Jun 26, 8:10 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 20 min |
| Jun 26, 8:25 PM MDT | Tornado Warning | BYZ | Musselshell, Yellowstone | 35 min |
| Jun 26, 9:00 PM MDT | Tornado Warning | BYZ | Yellowstone | 45 min |
| Jun 26, 9:10 PM MDT | Flash Flood Warning | BYZ | Yellowstone | 2 hr |
| Jun 26, 9:25 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
| Jun 26, 9:45 PM MDT | Tornado Warning | BYZ | Yellowstone | 45 min |
| Jun 26, 9:58 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| Jun 26, 11:17 PM MDT | Flash Flood Warning | BYZ | Yellowstone | 58 min |
| Jun 27, 2:30 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 60 min |
| Jun 27, 3:29 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 61 min |
| Jun 27, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 35 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.