Alert archive / Montana / Areal Flood Warnings in 2012

Areal Flood Warning 15, NWS Missoula, MT

July 15, 2012Lake County, Missoula County, Sanders County, Montana

NWS Missoula, MT issued this areal flood warning at Jul 15, 2012, 1:49 PM MDT for Lake County, Missoula County, Sanders County, Montana. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 15, 2012, 1:49 PM MDT (19:49 UTC)
Expired
Jul 15, 2012, 5:34 PM MDT
In force
4 hr
Issued by
NWS Missoula, MT
Area
Storm-based polygon
Flood severity
None

Counties Lake County, MT, Missoula County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 55 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 154 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-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2012-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 305 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2012-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
305 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
1372 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
-2 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 areal flood warning 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 areal flood warning went out at Jul 15, 3:36 AM MDT, 10 hours 13 minutes earlier.

Area forecast discussion, Jul 15, 3:36 AM MDT, 10 hours 13 minutes before
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In the hours before

Local storm report, Jul 15, 11:54 AM MDT, 1 hour 55 minutes before
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Local storm report, Jul 15, 12:19 PM MDT, 1 hour 30 minutes before
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Local storm report, Jul 15, 12:31 PM MDT, 1 hour 18 minutes before
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Special weather statement, Jul 15, 12:35 PM MDT, 1 hour 14 minutes before
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Local storm report, Jul 15, 12:44 PM MDT, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1244 PM MDT SUN JUL 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     TSTM WND GST     1 E PABLO               47.60N 114.10W
07/15/2012  E50.00 MPH       LAKE               MT   TRAINED SPOTTER

            TREES WERE BENT AT 45 DEGREES AND LASTED FOR ONE MINUTE.
            SMALL BRANCHES BROKE OFF.

1220 PM     HEAVY RAIN       3 W RONAN               47.53N 114.16W
07/15/2012  M0.78 INCH       LAKE               MT   TRAINED SPOTTER

            FELL IN 20 MINUTES FROM 1210 PM MDT TO 1230 PM MDT.

&&

NOBLE
Local storm report, Jul 15, 12:54 PM MDT, 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1254 PM MDT SUN JUL 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     TSTM WND DMG     PABLO                   47.60N 114.12W
07/15/2012                   LAKE               MT   LAW ENFORCEMENT

            ESTIMATED 20 TREES DOWN.

&&

NOBLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 7:28 PM MDTSevere Thunderstorm WarningMSOMineral32 min
Jul 14, 8:01 PM MDTSevere Thunderstorm WarningMSOMineral, Missoula11 min
Jul 14, 8:49 PM MDTSpecial Weather StatementMSOMissoula41 min
Jul 15, 12:09 PM MDTAreal Flood AdvisoryMSOLake, Missoula3 hr
Jul 15, 12:33 PM MDTFlash Flood WarningMSOLake117 min
Jul 15, 12:35 PM MDTSpecial Weather StatementMSOLake25 min
Jul 15, 12:52 PM MDTAreal Flood AdvisoryMSOGranite113 min
Jul 15, 2:28 PM MDTFlash Flood WarningMSOLake53 min
Jul 15, 3:01 PM MDTSpecial Weather StatementMSOMissoula29 min
Jul 14, 6:52 PM MDTSevere Thunderstorm WarningMSOIdaho53 min
Jul 15, 3:55 PM MDTSpecial Weather StatementMSOLewis50 min

Nearby

Areal Flood Warnings in Montana, 2012Every areal flood warning in 2012

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.