Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 49, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 16, 2001, 3:55 PM MDT for Cascade County, Meagher County, Montana. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 16, 2001, 3:55 PM MDT (21:55 UTC)
- Expired
- Jul 16, 2001, 4:30 PM MDT
- In force
- 35 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Cascade County, MT, Meagher County, MT
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 16, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.9 hours before the alert went out and 69 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1797 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 56 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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 16, 3:00 PM MDT, 55 minutes earlier.
Area forecast discussion, Jul 16, 3:00 PM MDT, 55 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 300 PM MDT MON JUL 16 2001 THE PATTERN IS QUITE SIMILAR TO THE PAST FEW DAYS. LOW PRESSURE CENTERED OVER WA AND BRITISH COLUMBIA...AND A TROF EXTENDING DOWN ACROSS THE PAC NW. MOST OF THE INDICES LOOK A LITTLE MORE THREATENING THAN YESTERDAY...AND CERTAINLY THE WIND SHEAR PATTERN IS QUITE A BIT BETTER FOR SEVERE WEATHER THAN YESTERDAY. MOST IMPORTANTLY...A SHORT WAVE PUSHES THRU LATER THIS AFTERNOON AND EVENING...WITH AN ASSOCIATED SURFACE FRONT. WATCH BOX 559 HAS ALREADY BEEN ISSUED FOR THE ERN CWA OF MSO AND MOST OF OUR CWA. TUESDAY ONWARD NOT TOO MUCH CHANGE GOING ON. SURFACE TEMPS SHOULD TREND A LITTLE COOLER AS CAA CONTINUES...BUT AT THE SAME TIME THE HEIGHTS ALOFT WILL BE DROPPING. THUS AIRMASS REMAINS RELATIVELY UNSETTLED. ZELZER EXTENDED...SOME DIFFERENCE AMONG THE MODELS...BUT DO KEEP UPPER TROUGH OVER PACIFIC NORTHWEST FOR CONTINUED MOIST AND UNSTABLE SOUTHWEST FLOW FOR DAYS 3 AND 4. UPPER TROUGH THEN SLITS BY DAY 5 WITH THE NORTHERN BRANCH MOVING THROUGH AREA. WEAK UPPER RIDGE BUILDS BY DAY 6 AND 7 FOR DRY AND WARMER WEATHER. TEMPERATURES WILL BE A LITTLE BELOW NORMAL WITH AT OR A LITTLE ABOVE NORMAL PRECIPITATION. CCF NUMBERS GTF EE 050 078 048 074 048 135122 CTB EE 048 072 046 070 045 135122 HLN EE 050 075 048 075 048 135222 BZN EE 047 075 047 073 045 136323 WEY PEE 052 074 040 072 038 136322 DLN EE 046 072 045 072 045 135223 HVR EE 057 080 054 080 052 136122 LWT EE 050 072 050 070 048 136222
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 2:53 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Lewis and Clark | 37 min |
| Jul 16, 2:58 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 32 min |
| Jul 16, 3:53 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 37 min |
| Jul 16, 4:28 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 47 min |
| Jul 16, 4:34 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Toole | 41 min |
| Jul 16, 5:18 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 42 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; the sounding from the Mesonet's radiosonde archive.