Alert archive / Montana / Special Weather Statements in 2010
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Aug 2, 2010, 7:55 PM MDT for Lake County, Montana. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2010, 7:55 PM MDT (01:55 UTC)
- Expired
- Aug 2, 2010, 8:45 PM MDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
County Lake County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.9 hours before the alert went out and 149 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
- 152 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 2339 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 2, 2:31 PM MDT, 5 hours 24 minutes earlier.
Area forecast discussion, Aug 2, 2:31 PM MDT, 5 hours 24 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 231 PM MDT MON AUG 2 2010 .DISCUSSION...A LOW PRESSURE TROF CONTINUES OVER THE PACIFIC NORTHWEST STATES. A SHORT WAVE WITHIN THIS TROF IS MOVING THROUGH SOUTHERN BRITISH COLUMBIA AND NORTHWEST MONTANA. INSTABILITY FROM THIS WAVE HAS ALREADY TRIGGERED A FEW THUNDERSTORMS...THE STRONGEST NEAR EUREKA. CONVECTION IS POSSIBLE IN NORTHWEST MONTANA THROUGH THE EVENING HOURS...ESPECIALLY ALONG THE CANADIAN BORDER WHERE THE STRONGEST STORMS ARE POSSIBLE. TUESDAY A SURFACE HIGH IN CANADA WILL MOVE INTO CENTRAL MONTANA. THIS WILL RESULT IN AN INCREASING SURFACE PRESSURE GRADIENT OVER WESTERN MONTANA. AS A RESULT EASTERLY WINDS FROM ACROSS THE DIVIDE WILL INCREASE LATE TUESDAY IN TO WEDNESDAY. UNSTABLE AIR AND LOW LEVEL MOISTURE IN PLACE WITH THIS BOUNDARY WILL BE CONDUCIVE FOR SCATTERED SHOWERS AND STORMS ACROSS MUCH OF WESTERN MONTANA. WEDNESDAY A SLIGHTLY MORE STABLE AIR IS ANTICIPATED AS A RIDGE OF HIGH PRESSURE AMPLIFIES OVER THE NORTHERN ROCKIES. THOUGH A FEW AFTERNOON SHOWERS OR THUNDERSTORMS ARE POSSIBLE IN CENTRAL IDAHO. TEMPERATURES WILL BEGIN TO WARM UP TO SLIGHTLY ABOVE NORMAL READINGS APPROACHING THE 90 DEGREE MARK IN MANY VALLEY LOCATIONS. SOUTHWESTERLY FLOW WILL BUILD OVER THE NORTHERN ROCKIES THURSDAY...CONTINUING THE WARMING TREND WITH TEMPERATURES SEVERAL DEGREES ABOVE NORMAL FOR THIS TIME OF YEAR. WEAK IMPULSES OF ENERGY AND MOISTURE WILL MAKE THEIR WAY THROUGH THE FLOW...BRINGING A POTENTIAL FOR MAINLY AFTERNOON SHOWERS AND THUNDERSTORMS THROUGH THE WEEKEND. FORECAST MODELS BEGIN TO DIVERGE ON THE STRENGTH OF YET ANOTHER TROUGH BUILDING OVER THE PACIFIC NORTHWEST BY SUNDAY...AND THUS CONFIDENCE PARTICULARLY IN TERMS OF PRECIPITATION CHANCES BEGINS TO DECREASE SUNDAY INTO EARLY NEXT WEEK. && .AVIATION...PERISISTENT SOUTHWEST FLOW AND AN EXITING UPPER LEVEL TROUGH WILL KEEP THE CHANCE OF ISOLATED SHOWER AND THUNDERSTORM DEVELOPMENT ACROSS NORTHWEST MONTANA...POSSIBLY NEAR KGPI...FOR THE REMAINDER OF THIS EVENING. ELSEWHERE...PARTLY TO MOSTLY CLEAR SKIES WITH BREEZY AFTERNOON MIXING WINDS CAN BE EXPECTED. FOR TUESDAY...THE UPPER LEVEL RIDGE WILL BUILD BACK INTO THE REGION FROM THE CENTRAL PLAINS...INTRODUCING EASTERLY FLOW INTO THE NORTHERN ROCKIES AND AREA TERMINALS. PLENTY OF MOISTURE AND INSTABILITY IN THE AREA WILL ALLOW FOR AFTERNOON SHOWER AND THUNDER DEVELOPMENT ACROSS THE NORTHERN ROCKIES TUESDAY. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...NONE. ID...NONE. && SHORT TERM...RPN LONG TERM....PALLISTER AVIATION...NOLTE
In the hours before
Special weather statement, Aug 2, 3:44 PM MDT, 4 hours 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
344 PM MDT MON AUG 2 2010
MTZ002-022215-
WEST GLACIER REGION-
344 PM MDT MON AUG 2 2010
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FLATHEAD COUNTY UNTIL 415
PM MDT...
AT 341 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 12 MILES NORTH OF WEST GLACIER...OR 35 MILES
NORTHEAST OF EVERGREEN...MOVING SOUTHEAST AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...LAKE MCDONALD AND
LOGAN PASS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.
&&
LAT...LON 4876 11376 4871 11369 4861 11373 4860 11364
4858 11362 4858 11355 4854 11347 4839 11364
4864 11408 4881 11378
TIME...MOT...LOC 2144Z 307DEG 21KT 4866 11388Special weather statement, Aug 2, 4:18 PM MDT, 3 hours 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 418 PM MDT MON AUG 2 2010 MTZ002-003-022300- FLATHEAD/MISSION VALLEYS-WEST GLACIER REGION- 418 PM MDT MON AUG 2 2010 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FLATHEAD COUNTY UNTIL 500 PM MDT... AT 413 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR WHITEFISH...OR 17 MILES NORTH OF EVERGREEN...MOVING SOUTHEAST AT 15 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COLUMBIA FALLS...WEST GLACIER...HUNGRY HORSE...CORAM AND MARTIN CITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. && LAT...LON 4851 11391 4825 11409 4841 11443 4855 11431 TIME...MOT...LOC 2218Z 297DEG 12KT 4847 11429 KITSMILLER
Special weather statement, Aug 2, 5:00 PM MDT, 2 hours 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
500 PM MDT MON AUG 2 2010
MTZ002-022330-
WEST GLACIER REGION-
500 PM MDT MON AUG 2 2010
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FLATHEAD COUNTY UNTIL 530
PM MDT...
AT 458 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WEST GLACIER...OR 25 MILES NORTHEAST OF
EVERGREEN...MOVING EAST AT 20 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...NYACK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.
&&
LAT...LON 4857 11353 4853 11346 4844 11348 4842 11341
4836 11342 4843 11407 4861 11405 4861 11373
TIME...MOT...LOC 2300Z 274DEG 18KT 4851 11392Special weather statement, Aug 2, 6:11 PM MDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 611 PM MDT MON AUG 2 2010 MTZ001-003-030100- FLATHEAD/MISSION VALLEYS-KOOTENAI/CABINET REGION- 611 PM MDT MON AUG 2 2010 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN SANDERS AND WESTERN LAKE COUNTIES UNTIL 700 PM MDT... AT 606 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15 MILES NORTHEAST OF PLAINS...OR 24 MILES WEST OF POLSON...MOVING EAST AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...CAMAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. && LAT...LON 4770 11444 4753 11446 4759 11478 4768 11475 TIME...MOT...LOC 0011Z 275DEG 5KT 4763 11466 KITSMILLER
Special weather statement, Aug 2, 7:05 PM MDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 705 PM MDT MON AUG 2 2010 MTZ001-003-030200- FLATHEAD/MISSION VALLEYS-KOOTENAI/CABINET REGION- 705 PM MDT MON AUG 2 2010 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN SANDERS AND WESTERN LAKE COUNTIES UNTIL 800 PM MDT... AT 654 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 16 MILES NORTHEAST OF PLAINS...OR 23 MILES WEST OF POLSON...MOVING EAST AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM... ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...HOT SPRINGS AND RURAL AREAS BETWEEN HOT SPRINGS AND LONEPINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. && LAT...LON 4772 11447 4753 11451 4757 11476 4771 11474 TIME...MOT...LOC 0103Z 274DEG 3KT 4762 11464 KITSMILLER
Special weather statement, Aug 2, 7:55 PM MDT, 0 minutes before
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</html>The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:11 PM MDT | Special Weather Statement | MSO | Lake | 49 min |
| Aug 2, 7:01 PM MDT | Areal Flood Advisory | MSO | Lake, Sanders | 102 min |
| Aug 2, 7:05 PM MDT | Special Weather Statement | MSO | Lake | 55 min |
| Aug 2, 7:38 PM MDT | Flash Flood Warning | MSO | Lake, Sanders | 77 min |
Nearby
Special Weather Statements in Montana, 2010Every special weather statement in 2010
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.