Alert archive / Montana / Flash Flood Watches in 2009
Flash Flood Watch 1, NWS Missoula, MT
NWS Missoula, MT issued this flash flood watch at Jun 4, 2009, 11:39 AM MDT for Deer Lodge County, Silver Bow County, Montana; Idaho County, Lemhi County, Idaho. It took effect at Jun 4, 2009, 2:00 PM MDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jun 4, 2009, 11:39 AM MDT (17:39 UTC)
- In effect from
- Jun 4, 2009, 2:00 PM MDT
- Expired
- Jun 4, 2009, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Missoula, MT
- Flood severity
- None
Counties Idaho County, ID, Lemhi County, ID, Deer Lodge County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 151 km from the middle of the area, began a volume at 17:41 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, 5.7 hours before the alert went out and 300 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
- 2745 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 2 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 Jun 4, 4:31 AM MDT, 7 hours 8 minutes earlier.
Area forecast discussion, Jun 4, 4:31 AM MDT, 7 hours 8 minutes before
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</html>Hazardous weather outlook, Jun 4, 6:00 AM MDT, 5 hours 39 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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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 |
|---|---|---|---|---|
| Jun 4, 4:43 PM MDT | Special Weather Statement | MSO | 32 min | |
| Jun 4, 3:17 PM MDT | Special Weather Statement | MSO | Idaho | 28 min |
| Jun 4, 3:35 PM MDT | Special Weather Statement | MSO | Idaho | 55 min |
| Jun 4, 4:09 PM MDT | Special Weather Statement | MSO | Lemhi | 36 min |
Nearby
Flash Flood Watches in Montana, 2009Flash Flood Watches in Idaho, 2009Every flash flood watch in 2009
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.