Alert archive / Montana / Flash Flood Watches in 2010
Flash Flood Watch 4, NWS Missoula, MT
NWS Missoula, MT issued this flash flood watch at Aug 9, 2010, 1:32 PM MDT for 6 counties in Montana; Idaho County, Lemhi County, Idaho. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 2010, 1:32 PM MDT (19:32 UTC)
- Expired
- Aug 9, 2010, 9:21 PM MDT
- In force
- 8 hr
- Issued by
- NWS Missoula, MT
- Flood severity
- None
Counties Idaho County, ID, Lemhi County, ID, Deer Lodge County, MT, Granite County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 103 km from the middle of the area, began a volume at 19:32 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, 7.5 hours before the alert went out and 277 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
- 6 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 1918 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Aug 9, 3:17 AM MDT, 10 hours 15 minutes earlier.
Area forecast discussion, Aug 9, 3:17 AM MDT, 10 hours 15 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 8, 6:18 PM MDT | Special Weather Statement | MSO | Deer Lodge | 42 min |
| Aug 8, 7:16 PM MDT | Special Weather Statement | MSO | Granite | 44 min |
| Aug 8, 8:27 PM MDT | Special Weather Statement | MSO | Granite | 48 min |
| Aug 9, 1:25 PM MDT | Areal Flood Advisory | MSO | Granite | 114 min |
| Aug 9, 4:23 PM MDT | Flash Flood Warning | MSO | Granite | 87 min |
| Aug 9, 5:30 PM MDT | Special Weather Statement | MSO | Lake | 45 min |
| Aug 9, 1:42 PM MDT | Special Weather Statement | MSO | Idaho | 48 min |
| Aug 9, 3:40 PM MDT | Special Weather Statement | MSO | Clearwater | 50 min |
Nearby
Flash Flood Watches in Montana, 2010Flash Flood Watches in Idaho, 2010Every flash flood watch 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; radar from the NEXRAD Level II archive.