Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 15, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 28, 2001, 12:34 AM MDT for Fergus County, Montana. It was in force for 41 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jun 28, 2001, 12:34 AM MDT (06:34 UTC)
- Expired
- Jun 28, 2001, 1:15 AM MDT
- In force
- 41 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Fergus County, MT
The radar
The Great Falls radar (KTFX), 162 km from the middle of the area, began a volume at 06:36 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 28, 12:45 AM MDT | Hail 1 | Suffolk, MT | Actual spotter location Suffolk 2 W. |
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, 7:30 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 6.6 hours before the alert went out and 103 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
- 1392 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 2183 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KTFX 280635 SVRGTF MTC027-280715- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 1234 AM MDT THU JUN 28 2001 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL FERGUS COUNTY IN CENTRAL MONTANA * UNTIL 115 AM MDT * AT 1231 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER WINIFRED...OR ABOUT 33 MILES NORTH OF LEWISTOWN...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN OVER... RURAL AREAS REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT THURSDAY MORNING FOR NORTH CENTRAL MONTANA. LAT...LON 4753 10947 4741 10928 4765 10887 4781 10910
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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 9:40 PM MDT, 2 hours 54 minutes earlier.
Area forecast discussion, Jun 27, 9:40 PM MDT, 2 hours 54 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 940 PM MDT WED JUN 27 2001 LINE OF THUNDERSTORMS STRETCHED ACROSS EASTERN CWA...NEAR HVR/LWT LINE AT 03Z. HAVE RECEIVED REPORTS OF AREAS OF HEAVY RAIN AND SMALL HAIL WITH STORMS WITH RADAR INDICATING A FEW STRONGER STORMS. LINE PUSHING INTO MORE UNSTABLE ENVIRONMENT AND EXPECT ACTIVITY TO INCREASE AS LINE MOVES EAST. SEVERE THUNDERSTORM WATCH IN EFFECT FOR HILL...BLAINE...CHOUTEAU...FERGUS AND JUDITH BASIN COUNTIES UNTIL 1 AM MDT. ISOLATED TO SCATTERED THUNDERSTORMS REDEVELOPING OVER WESTERN CWA STRETCHING BACK INTO EASTERN WA TO SOUTHWEST ID. WILL DROP CHANCES OF PRECIP SLIGHTLY BEHIND LINE AND WORD FOR DECREASING ACTIVITY AFTER MIDNIGHT. FOR THURSDAY AND FRIDAY...UPPER FLOW BECOMES MORE CYCLONIC...ALTHOUGH RESIDUAL INSTABILITY AND WEAK SHORTWAVES AFFECTING THE SOUTHEAST ZONES WILL ALLOW FOR ISOLATED THUNDERSTORMS DURING THE AFTERNOON AND EVENING. EXTENDED...UPPER LEVEL LOW PRESSURE TROUGH REMAINS CENTERED OFF BC COAST EARLY IN PERIOD WITH HIGH PRESSURE RIDGE CENTERED OVER FOUR CORNERS REGION. TROUGH CONTINUES TO SPIN DISTURBANCES INLAND WITH SOUTHWEST FLOW OVER PACIFIC NORTHWEST STEERING THE DISTURBANCES INTO WESTERN MONTANA. THE STRONGEST OF THESE WILL BRUSH ACROSS THE NORTHWEST AND NORTHERN PORTION OF THE CWA SATURDAY NIGHT AND SUNDAY FOR THE BEST CHANCE OF SHOWERS. AS THIS DISTURBANCE EXITS...THE HIGH PRESSURE RIDGE BEGINS STRENGTHENING AND RETROGRADING...WITH THE CENTER OVER NORTHWEST WY AND THE AXIS SHIFTING TO THE MT/ID BORDER. THIS SHIFT WILL KEEP TEMPERATURES SEASONABLY WARM WITH ONLY ISOLATED AFTERNOON SHOWERS OR THUNDERSTORMS OVER THE MOUNTAINS. GTF BB 054/078 050/078 048 19211 CTB BB 050/072 047/072 045 19511 HLN BB 045/080 050/080 050 19211 BZN BB 052/080 049/080 048 19222 WEY BB 046/072 044/074 042 19222 DLN BB 051/078 047/078 056 19411 HVR BU 054/083 050/083 050 19611 LWT BB 053/074 048/074 046 19422
In the hours before
Special weather statement, Jun 27, 10:30 PM MDT, 2 hours 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 1030 PM MDT WED JUN 27 2001 MTZ011-013-016-021-047-050-051-059-060-280530- BLAINE-CENTRAL AND SOUTHEAST PHILLIPS-CHOUTEAU-FERGUS-HILL-JUDITH BASIN-NORTHERN PHILLIPS-PETROLEUM-SOUTHWEST PHILLIPS- 1030 PM MDT WED JUN 27 2001 THE NATIONAL WEATHER SERVICE HAS CLEARED THE FOLLOWING COUNTIES FROM SEVERE THUNDERSTORM WATCH NUMBER 474... IN NORTH CENTRAL MONTANA: BLAINE CHOUTEAU HILL SEVERE THUNDERSTORM WATCH NUMBER 474 REMAINS IN EFFECT UNTIL 1 AM MDT FOR...FERGUS...JUDITH BASIN...PETROLEUM AND PHILLIPS COUNTIES.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 6:30 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 45 min |
| Jun 27, 7:27 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 48 min |
| Jun 27, 9:09 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 51 min |
| Jun 27, 10:00 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 45 min |
| Jun 27, 11:14 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 46 min |
| Jun 28, 12:14 AM MDT | Flash Flood Warning | TFX | Chouteau, Fergus, Judith Basin | 4 hr |
| Jun 28, 1:45 AM MDT | Severe Thunderstorm Warning | TFX | Meagher | 30 min |
| Jun 28, 2:56 AM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 49 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.