Alert archive / Montana / Flood Watches in 2024
Flood Watch 2, NWS Missoula, MT
NWS Missoula, MT issued this flood watch at Sep 11, 2024, 1:29 PM MDT for 5 counties in Montana; Lemhi County, Idaho. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Sep 11, 2024, 1:29 PM MDT (19:29 UTC)
- Expired
- Sep 11, 2024, 9:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Missoula, MT
- Flood severity
- None
Counties Lemhi County, ID, Deer Lodge County, MT, Granite County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 121 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 263 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
- 3 J/kg
- Mixed-layer CIN
- -417 J/kg
- Mixed-layer LCL
- 2068 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this 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 flood watch went out at Sep 11, 1:00 PM MDT, 29 minutes earlier.
Area forecast discussion, Sep 11, 1:00 PM MDT, 29 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 |
|---|---|---|---|---|
| Sep 11, 2:41 PM MDT | Special Weather Statement | MSO | Deer Lodge | 34 min |
| Sep 11, 4:09 PM MDT | Special Weather Statement | MSO | Powell | 36 min |
| Sep 11, 4:11 PM MDT | Special Weather Statement | MSO | Powell | 34 min |
| Sep 11, 4:49 PM MDT | Special Weather Statement | MSO | Silver Bow | 26 min |
| Sep 11, 4:52 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Silver Bow | 23 min |
| Sep 11, 4:53 PM MDT | Flash Flood Warning | MSO | Silver Bow | 61 min |
| Sep 11, 1:57 PM MDT | Flash Flood Warning | MSO | Lemhi | 109 min |
Nearby
Flood Watches in Montana, 2024Flood Watches in Idaho, 2024Every flood watch in 2024
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.