Alert archive / Montana / Flood Watches in 2011

Flood Watch 12, NWS Missoula, MT

December 27, 2011Lincoln County, Montana

NWS Missoula, MT issued this flood watch at Dec 27, 2011, 10:49 AM MST for Lincoln County, Montana. It took effect at Dec 27, 2011, 5:00 PM MST. It was in force for 3 days.

The area

The counties it named.

The facts

Issued: Dec 27, 2011, 10:49 AM MST (17:49 UTC)
In effect from: Dec 27, 2011, 5:00 PM MST
Expired: Dec 30, 2011, 6:00 PM MST
In force: 3 days
Issued by: NWS Missoula, MT
Flood severity: None

County Lincoln County, MT

The radar

The Spokane radar (KOTX), 191 km from the middle of the area, began a volume at 17:50 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, 5.8 hours before the alert went out and 119 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 735 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Dec 27, 8:20 AM MST, 2 hours 29 minutes earlier.

Area forecast discussion, Dec 27, 8:20 AM MST, 2 hours 29 minutes before

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The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 27, 3:15 AM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Mineral, Missoula, Ravalli and 1 more	57 hr
Dec 27, 2:19 PM MST	Wind Advisory	MSO	Deer Lodge, Granite, Missoula, Powell, Ravalli, Silver Bow	48 hr

Nearby

Flood Watches in Montana, 2011 Every flood watch in 2011

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.