Alert archive / Montana / Tornado Warnings in 2001
Tornado Warning 6, NWS Glasgow, MT
NWS Glasgow, MT issued this tornado warning at Jul 17, 2001, 11:46 PM MDT for Roosevelt County, Montana. It was in force for 59 min. No storm report in the archive falls 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.
The facts
- Issued
- Jul 17, 2001, 11:46 PM MDT (05:46 UTC)
- Expired
- Jul 18, 2001, 12:45 AM MDT
- In force
- 59 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Roosevelt County, MT
The radar
The Glasgow radar (KGGW), 153 km from the middle of the area, began a volume at 05:49 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.
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 17, 10:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 5.8 hours before the alert went out and 151 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
- 339 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 2182 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KGGW 180546 TORGGW MTC085-180645- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GLASGOW MT 1146 PM MDT TUE JUL 17 2001 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * TORNADO WARNING FOR... EASTERN ROOSEVELT COUNTY IN NORTHEAST MONTANA * UNTIL 1245 AM MDT * AT 1139 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 6 MILES WEST OF CULBERTSON...MOVING NORTHEAST AT 25 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... FROID AT MIDNIGHT MDT IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. LAT...LON 4817 10480 4813 10451 4837 10412 4838 @10450 .END 77
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 17, 8:20 PM MDT, 3 hours 26 minutes earlier.
Area forecast discussion, Jul 17, 8:20 PM MDT, 3 hours 26 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
820 PM MDT TUE JUL 17 2001
...SEVERE THUNDERSTORM WATCH FOR ENTIRE CWA THROUGH 10 PM...
STRONG STORMS CONTINUING OVER WEST CENTRAL PORTIONS OF CWA ATTM.
STRONGEST INSTABILITY REMAINS OVER FAR EASTERN ZONES. WILL BE A RACE
TO SEE IF UPPER LEVEL DYNAMICS CAN MAKE IT THERE BEFORE DIURNAL
COOLING BEGINS. EXPLOSIVE THUNDERSTORM DEVELOPMENT NORTH OF SHERIDAN
COUNTY IN CANADA HAS ME A BIT CONCERNED. INSTABILITY AXIS LIES ALONG
NORTH DAKOTA BORDER SOUTH OF THIS STORM. ALTHOUGH NOT BEING
INDICATED WELL ON RADAR. STORMS JUST NOW BEGINNING TO FIRE OVER
RICHLAND COUNTY (CAN SEE THEM OFF TO THE EAST OUT OF WINDOW). IF
THESE STORMS SHOW THE SAME EXPLOSIVE DEVELOPMENT AS THE CANADIAN
STORM...COULD HAVE A LONGER THAN EXPECTED EVENT. WILL LEAVE
WATCH/ZONE ARRANGEMENT ALONE FOR NOW. POHL
EXTENDED...UPPER LOW REMAINS OVER ALBERTA UNTIL SAT WHEN IT MOVES
EAST AS AN OPEN TROF. THEN AN UPPER TROF DEVELOPS OVER WEST COAST
OVER THE WEEKEND THAT CONTINUES INTO EARLY NEXT WEEK. EXCEPT FOR A
BRIEF PERIOD ON SUNDAY...ERN MT IS IN SW FLOW ALOFT FOR THE ENTIRE
EXTENDED PERIOD WITH FREQUENT SHORTWAVES. GIVEN THE UNSETTLED
PATTERN...WILL NEED TO MENTION A CHANCE OF THUNDERSTORMS EACH DAY.
FORRESTER
KGGW 062/084 060/085 062/082 058/083 056/085 058/084 061/085
TTTBBBB 793323/7933333
KGDV 063/085 061/085 061/085 057/085 058j/085 058/084 060/084
TTTBBBB 794423/7933333In the hours before
Special weather statement, Jul 17, 10:00 PM MDT, 1 hour 46 minutes before
MTZ016-021-059-060-180430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 1000 PM MDT TUE JUL 17 2001 THE NATIONAL WEATHER SERVICE HAS CLEARED A PORTION OF SEVERE THUNDERSTORM WATCH NUMBER 565. AREAS CLEARED FROM THE SEVERE THUNDERSTORM WATCH INCLUDE: IN NORTHEAST MONTANA: PETROLEUM PHILLIPS THIS INCLUDES THE CITIES OF MALTA...WHITEWATER...WINNETT AND ZORTMAN.
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 7:53 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 67 min |
| Jul 17, 8:52 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 53 min |
| Jul 17, 8:58 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 62 min |
| Jul 17, 9:51 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 54 min |
| Jul 17, 9:57 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 63 min |
| Jul 17, 10:11 PM MDT | Tornado Warning | GGW | Dawson | 64 min |
| Jul 17, 10:24 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 66 min |
| Jul 17, 10:40 PM MDT | Flash Flood Warning | GGW | Richland | 3 hr |
| Jul 17, 10:47 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 58 min |
| Jul 17, 10:52 PM MDT | Tornado Warning | GGW | Richland | 53 min |
| Jul 17, 10:54 PM MDT | Flash Flood Warning | GGW | Dawson | 3 hr |
| Jul 17, 10:56 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 64 min |
| Jul 17, 11:09 PM MDT | Flash Flood Warning | GGW | Roosevelt | 3 hr |
| Jul 17, 11:15 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 60 min |
| Jul 17, 11:23 PM MDT | Flash Flood Warning | GGW | Sheridan | 3 hr |
| Jul 17, 11:34 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 56 min |
| Jul 17, 11:46 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 59 min |
| Jul 17, 11:51 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 54 min |
| Jul 18, 12:47 AM MDT | Severe Thunderstorm Warning | GGW | Prairie | 58 min |
| Jul 18, 1:07 AM MDT | Flash Flood Warning | GGW | Prairie | 3 hr |
| Jul 18, 1:46 AM MDT | Flash Flood Warning | GGW | Richland | 3 hr |
| Jul 18, 2:01 AM MDT | Flash Flood Warning | GGW | Dawson | 3 hr |
| Jul 18, 2:15 AM MDT | Flash Flood Warning | GGW | Roosevelt | 3 hr |
| Jul 18, 2:28 AM MDT | Flash Flood Warning | GGW | Sheridan | 3 hr |
| Jul 18, 4:41 AM MDT | Flash Flood Warning | GGW | Dawson, McCone, Richland | 3 hr |
Nearby
Tornado Warnings in Montana, 2001Every tornado warning in 2001Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.