Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 108, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 20, 2001, 7:25 PM MDT for Prairie County, Montana. It was in force for 65 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
- Jul 20, 2001, 7:25 PM MDT (01:25 UTC)
- Expired
- Jul 20, 2001, 8:30 PM MDT
- In force
- 65 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Prairie County, MT
The radar
The Glasgow radar (KGGW), 176 km from the middle of the area, began a volume at 01:27 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 20, 8:15 PM MDT | Hail 1.25 | Terry, MT | |
| Jul 20, 8:21 PM MDT | Hail 1 | Terry, MT | |
| Jul 20, 8:30 PM MDT | Hail 1 | Terry, 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 20, 4:00 PM MDT | Tornado Watch | SPC | 7 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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 2:15 PM MDT, 5 hours 10 minutes earlier.
Area forecast discussion, Jul 20, 2:15 PM MDT, 5 hours 10 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
215 PM MDT FRI JUL 20 2001
SW FLOW WITH DISTURBANCES RIPPLING THROUGH THE FLOW WILL CONTINUE AFFECT
THE AREA INTO SATURDAY NIGHT. THIS MEANS SEVERE WEATHER POTENTIAL WILL
CONTINUE. ETA AND AVN IN FAIR AGREEMENT THROUGH THE PERIOD WITH
PLACEMENT OF SYSTEMS. 500 MB VORT LOBE OVER ALBERTA WITH THE TROF
EXTENDING DOWN INTO THE PAC NW LIFTS OUT INTO MANITOBA BY LATE
SUNDAY. AT 00Z MON...LI/S DROP TO BELOW 0 IN A PORTION OF THE CWA WITH
A WEAK UPPER RIDGE PUSHING IN FROM WESTERN MT. JAMBA
EXTENDED...MRF IN DISAGREEMENT WITH ECMWF AND CANADIAN GEM MODELS
BEYOND DAY 4. A REX BLOCK THAT THE MODELS AGREE WITH SUN/MON SPINS
INTO A DIFFERENT SOLUTION BY ALL MODELS BY TUE. MRF PULLS THE
LOW ACROSS MT AND KEEPS THE CHANCES OF THUNDERSTORMS ACROSS THE CWA
THROUGH FRI...WHILE THE CANADIAN AND THE ECMWF BUILD THE RIDGE OVER
MT WITH THE LOW STAYING NEAR THE WEST COAST. WILL KEEP WITH THE
CHANCES OF STORMS THROUGH WED...WITH A MAINLY DRY CONDITIONS FOR THU
AND FRI. JAMBA
KGGW 062/088 064/085 057/082 058/083 058/083 058/084 057/085
TTTTTBB 764352/7633322
KGDV 065/089 064/085 059/084 059/084 059/084 058/085 057/086
TTTTTBB 765352/7633322The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 6:15 PM MDT | Tornado Warning | GGW | McCone | 60 min |
| Jul 20, 6:28 PM MDT | Flash Flood Warning | GGW | Garfield, McCone | 3 hr |
| Jul 20, 6:41 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 64 min |
| Jul 20, 6:56 PM MDT | Tornado Warning | GGW | Dawson | 64 min |
| Jul 20, 7:09 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 66 min |
| Jul 20, 7:15 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 60 min |
| Jul 20, 7:24 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 66 min |
| Jul 20, 7:57 PM MDT | Tornado Warning | GGW | Dawson | 63 min |
| Jul 20, 8:14 PM MDT | Tornado Warning | GGW | Richland | 61 min |
| Jul 20, 8:30 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 60 min |
| Jul 20, 8:35 PM MDT | Flash Flood Warning | GGW | Dawson, Prairie | 6 hr |
| Jul 20, 8:43 PM MDT | Tornado Warning | GGW | Wibaux | 62 min |
| Jul 20, 9:27 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 63 min |
| Jul 20, 10:15 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Jul 21, 5:23 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 67 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; radar from the NEXRAD Level II archive.