Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 2, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at May 26, 2001, 2:32 PM MDT for Broadwater County, Jefferson County, Montana. It was in force for 28 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
- May 26, 2001, 2:32 PM MDT (20:32 UTC)
- Expired
- May 26, 2001, 3:00 PM MDT
- In force
- 28 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Broadwater County, MT, Jefferson County, MT
The radar
The Great Falls radar (KTFX), 131 km from the middle of the area, began a volume at 20:32 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 nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.5 hours before the alert went out and 154 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
- 15 J/kg
- Mixed-layer CIN
- -251 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KTFX 262033 SVRGTF MTC007-043-262100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 232 PM MDT SAT MAY 26 2001 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL BROADWATER COUNTY IN SOUTHWEST MONTANA THIS INCLUDES THE CITY OF TOWNSEND NORTHEASTERN JEFFERSON COUNTY IN SOUTHWEST MONTANA * UNTIL 300 PM MDT * AT 230 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST OF TOWNSEND...MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... TOWNSEND AT 250 PM MDT REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEtMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. LAT...LON 4632 11191 4619 11173 4622 11140 4644 11152
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 May 26, 9:15 AM MDT, 5 hours 17 minutes earlier.
Area forecast discussion, May 26, 9:15 AM MDT, 5 hours 17 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 915 AM MDT SAT MAY 26 2001 ...MINOR UPDATE PLANNED FOR ZONES THIS MORNING... CURRENT FORECAST LOOKS PRETTY GOOD WITH THE EXCEPTION OF A FEW MINOR WORDING CHANGES AND AN INTRODUCTION OF SMALL POPS TO THE HAVRE AREA. ONE SHORTWAVE HAS JUST ABOUT EXITED THE SOUTHEAST CORNER OF THE STATE BUT SEVERAL MORE ARE EXPECTED TO RIPPLE THROUGH DURING THIS FORECAST PERIOD. MODELS BRING ANOTHER SHORTWAVE THROUGH THE SOUTHWEST THIS AFTERNOON. STRONG UPPER LOW DIGGING OFF THE COAST WILL SHARPEN THE RIDGE OVER THE REGION AS THE PERIOD WEARS ON FOR INCREASING SOUTHWEST FLOW. ATMOSPHERE WILL DESTABILIZE THIS AFTERNOON WITH LIFTED INDICES BETWEEN MINUS 2 AND MINUS 5 AND CAPES IN EXCESS OF 1300 J/KG. MODELS ALSO CONSISTENT WITH SOME LOW LEVEL CONVERGENCE...AGAIN MAINLY OVER THE SOUTHWESTERN ZONES. 12Z SOUNDING GIVES A CONVECTIVE TEMP OF 76 FOR GREAT FALLS AND SEE NO REASON WHY THAT WILL NOT BE REACHED. SOUNDING ALSO SHOWS SOME CAPPING BUT IT DOES APPEAR TO BE QUITE WEAK. I WILL INTRODUCE SOME MINOR POPS FOR THE HAVRE ZONES BASED ON THE FACT THE BEARS PAW MOUNTAINS OFTEN ACT AS AN ELEVATED HEAT SOURCE. I WILL ALSO BOOST POPS UP TO LOW SCATTERED ACROSS THE SOUTHWEST. BASED ON MODEL SOUNDINGS...MOST AREAS ACROSS THE SOUTHWEST ARE ALREADY APPROACHING THEIR CONVECTIVE TEMPERATURES WITH HIGHER LIFTED INDICES THAN PREVIOUS RUNS. MAIN THREAT ONCE AGAIN SHOULD BE GUSTY WINDS. GOUDSWARD EXTENDED DISCUSSION...LITTLE CHANGE IN EXTENDED FROM PREVIOUS PACKAGE. ERN PAC TROUGH SWINGS INTO PAC NW MONDAY AND ACROSS THE STATE MONDAY NIGHT AND TUESDAY FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. BY WEDNESDAY UPPER RIDGE BUILDS AGAIN OVER THE PAC NW. CHANCE OF SHOWERS AND THUNDERSTORMS REMAINS OVER SW ZONES GTF CWFA WEDNESDAY...OTHERWISE WILL GO WITH MAINLY DRY AND SOMEWHAT WARMER CONDITIONS. BRITTON BRITTON CCF NUMBERS GTF UU 080/048 080/050 072 06212 CTB BB 077/048 077/049 070 06212 HLN BB 082/050 079/048 076 06323 BZN BB 082/046 078/046 076 06323 WEY BB 077/036 075/038 072 06334 DLN BB 082/045 075/046 072 06334 HVR UU 085/048 083/053 078 06200 LWT UB 078/047 075/046 072 06223
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; radar from the NEXRAD Level II archive.