Alert archive / Montana / Flash Flood Watches in 2019
Flash Flood Watch 1, NWS Missoula, MT
NWS Missoula, MT issued this flash flood watch at Aug 9, 2019, 2:23 PM MDT for 10 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Aug 10, 2019, 12:00 PM MDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 2019, 2:23 PM MDT (20:23 UTC)
- In effect from
- Aug 10, 2019, 12:00 PM MDT
- Expired
- Aug 10, 2019, 10:00 PM MDT
- In force
- 10 hr
- Issued by
- NWS Missoula, MT
- Flood severity
- None
Counties Clearwater County, ID, Idaho County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 19 km from the middle of the area, began a volume at 20:25 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
Spokane, WA (KOTX), launched 12:00Z, 8.4 hours before the alert went out and 190 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
- 2306 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 174 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, 3:31 AM MDT, 10 hours 52 minutes earlier.
Area forecast discussion, Aug 9, 3:31 AM MDT, 10 hours 52 minutes before
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Special weather statement, Aug 9, 1:36 PM MDT, 47 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 9, 1:36 PM MDT | Special Weather Statement | MSO | Lewis | 39 min |
Nearby
Flash Flood Watches in Montana, 2019Flash Flood Watches in Idaho, 2019Every flash flood watch in 2019
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.