Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 37, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Sep 25, 2001, 7:46 PM MDT for Missoula County, Ravalli County, Montana. It was in force for 74 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
- Sep 25, 2001, 7:46 PM MDT (01:46 UTC)
- Expired
- Sep 25, 2001, 9:00 PM MDT
- In force
- 74 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Missoula County, MT, Ravalli County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.8 hours before the alert went out and 222 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
- 1758 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
851 WUUS55 KMSO 260145 SVRMSO MTC063-081-260300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 746 PM MDT TUE SEP 25 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MISSOULA COUNTY IN WEST CENTRAL MONTANA RAVALLI COUNTY IN WEST CENTRAL MONTANA * UNTIL 900 PM MDT * AT 740 PM MDT...SPOTTERS REPORTED A SEVERE THUNDERSTORM OVER HAMILTON AND IN THE SOUTHSIDE OF MISSOULA. THE STORM WAS MOVING NORTH AT 10 TO 20 MPH. EXPECT WIND GUSTS OF 60 TO 70 MPH WITH THESE STORMS. * THE SEVERE THUNDERSTORM WILL BE... OVER NORTH MISSOULA BETWEEN 755 AND 805 PM... FRENCHTOWN BETWEEN 800 AND 810 PM 745 PM MDT AND CLINTON BETWEEN 810 AND 820 PM... DAMAGING WINDS IN EXCESS OF 65 MPH ARE LIKELY WITH THIS SEVERE THUNDERSTORM. DANGEROUS LIGHTNING IS ALSO POSSIBLE WITH THESE STORMS. GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. LAT...LON 4605 11433 4612 11401 4689 11390 4689 11431 NESTER
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 Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 25, 3:16 PM MDT, 4 hours 30 minutes earlier.
Area forecast discussion, Sep 25, 3:16 PM MDT, 4 hours 30 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
316 PM MDT TUE SEP 25 2001
CORRECTED HIGHLIGHT SECTION BELOW
.SHORT TERM...DYNAMIC UPPER LOW OVER SOUTH CENTRAL OR EJECTS
NORTHWARD TONIGHT BRINGING MOISTURE AND DIFFLUENCE ALOFT INTO THE
CWA. EXPECT SHOWERS TO INCREASE ACROSS THE REGION WHILE THE AIR MASS
REMAINS UNSTABLE OVERNIGHT...THUNDERSTORMS MAY EVEN PERSIST IN THE
NORTH NEAR COLD POOL ALOFT TOWARD SUNRISE. MAIN PROBLEM IS DRY AIR AT
LOWER LEVELS LEADING TO EVAPORATION AND GUSTY WINDS DURING THE EARLY
EVENING HOURS. ALREADY SEEING GUSTS NEAR 50 MPH IN SOUTHWEST MT AT
20Z ALONG LEADING BAND OF CLOUDS AND SHOWERS ALOFT. STRONG SURFACE
LOW WITH PRESSURE COUPLET IN EASTERN WA AND A SLOW MOVING COOL FRONT
ACROSS CENTRAL ID...EVENTUALLY PUSH THROUGH WESTERN MT LATER THIS
EVENING. SOUTHERLY WINDS WILL BE SHIFTING TO WEST. AIR MASS MOISTENS
ENOUGH TO SEE MEASURABLE PRECIP ACROSS CLEARWATER MOUNTAIN ZONES INTO
NORTHWEST MT. LINGERING EFFECTS FROM WEAKENING TROUGH FOR A CHANCE OF
MORNING SHOWERS IN THE NORTH...THEN A DRYING TREND. GLANCING BLOW OF
NEXT SHORTWAVE IN SOUTHWEST FLOW FOR SLIGHT CHANCE WORDING NEAR THE
ID PANHANDLE WEDNESDAY NIGHT. RIDGE BUILDS OVER THE AREA THURSDAY
AS AN UPPER LOW DEEPENS OFF THE WEST COAST. AVN A LITTLE STRONGER
WITH THE LOW COMPARED TO ETA. WILL BUMP UP TO A CHANCE ON FRIDAY AS
THIS SYSTEM MOVES INLAND. BOLDT
.LONG TERM...MODELS NOW ALL IN AGREEMENT REBUILDING STRONG RIDGE
OVER THE WEST EARLY NEXT WEEK. TAIL END OF SHORTWAVE EXITS SATURDAY
MORNING WITH SOME LINGERING CLOUD COVER...THEN CLEAR WITH WARM UP
SUNDAY AS THICKNESSES BACK UP NEAR 573. BY TUE...MRF HINTS AT
FLATTENING RIDGE...BUT STILL DRY WITH ABOVE NORMAL TEMPS. SULLIVAN
.MSO...RED FLAG WARNING FOR ALL FIRE WEATHER ZONES 102 THROUGH 111
TONIGHT.
WIND ADVISORY MT ZONES 5>7 AND ID ZONES 6>10 THIS EVENING
...7-DAY SPOT TEMPS AND POPS...
LIB EBC 046/069 038/072 040/073 28731014
BUUB 041/074 039/080 040/080 042/075 3600000000
FCA EBE 045/069 036/070 038/071 28730004
BUUB 039/073 037/078 039/078 041/074 3600000000
POL BBE 053/070 048/071 048/072 28720004
BUUB 048/072 044/076 045/076 047/074 3600000000
MSO BBE 046/072 038/075 040/074 28710003
BUUB 041/075 039/080 040/080 042/077 3600000000
HMM BBE 046/072 039/075 042/075 28710002
BUUB 042/076 040/081 042/081 044/078 3600000000
BTM BBB 040/071 033/074 036/075 28300001
BUUB 037/073 033/077 034/077 037/074 3600000000
ORO BBE 054/076 052/080 053/078 28700003
BUUB 052/080 048/085 050/085 052/082 3600000000
GRV BBE 050/072 046/075 047/074 28700003
BUUB 046/075 043/080 045/080 048/077 3600000000
SMN BBB 040/073 036/076 039/075 28300001
BUUB 040/075 035/079 036/079 039/077 3600000000Nearby
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.