Alert archive / Montana / Snow Advisories in 2007
Snow Advisory 23, NWS Missoula, MT
NWS Missoula, MT issued this snow advisory at May 2, 2007, 3:02 PM MDT for 9 counties in Montana. It took effect at May 3, 2007, 2:58 AM MDT. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- May 2, 2007, 3:02 PM MDT (21:02 UTC)
- In effect from
- May 3, 2007, 2:58 AM MDT
- Expired
- May 3, 2007, 6:00 PM MDT
- In force
- 15 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 27 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 244 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
- 230 J/kg
- Mixed-layer CIN
- -226 J/kg
- Mixed-layer LCL
- 1904 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this snow advisory 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 snow advisory went out at May 2, 2:25 PM MDT, 37 minutes earlier.
Area forecast discussion, May 2, 2:25 PM MDT, 37 minutes before
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</html>Hazardous weather outlook, May 2, 4:03 AM MDT, 10 hours 59 minutes before
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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.