Alert archive / Idaho / Flash Flood Warnings in 2013

Flash Flood Warning 10, NWS Boise, ID

September 4, 2013Camas County, Idaho

NWS Boise, ID issued this flash flood warning at Sep 4, 2013, 9:38 PM MDT for Camas County, Idaho. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 4, 2013, 9:38 PM MDT (03:38 UTC)
Expired
Sep 4, 2013, 11:30 PM MDT
In force
112 min
Issued by
NWS Boise, ID
Area
Storm-based polygon
Flood severity
None

County Camas County, ID

The radar

The Boise radar (KCBX), 115 km from the middle of the area, began a volume at 03:39 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

Boise Airport, ID (KBOI), launched 00:00Z, 3.6 hours before the alert went out and 113 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, Boise Airport, ID at 00:00Z on 2013-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 126 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, Boise Airport, ID at 00:00Z on 2013-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
126 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
3006 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boise, ID wrote its last area forecast discussion before this flash flood warning went out at Sep 4, 8:51 PM MDT, 47 minutes earlier.

Area forecast discussion, Sep 4, 8:51 PM MDT, 47 minutes before
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Hazardous weather outlook, Sep 4, 5:52 AM MDT, 15 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BOISE ID
552 AM MDT WED SEP 4 2013

IDZ011>016-028>030-033-ORZ061>064-051200-
WEST CENTRAL MOUNTAINS-LOWER TREASURE VALLEY ID-BOISE MOUNTAINS-
UPPER TREASURE VALLEY-SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY-
CAMAS PRAIRIE-OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY-
UPPER WEISER RIVER-HARNEY COUNTY-BAKER COUNTY-MALHEUR COUNTY-
LOWER TREASURE VALLEY OR-
552 AM MDT WED SEP 4 2013 /452 AM PDT WED SEP 4 2013/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO...NORTHEAST OREGON
AND SOUTHEAST OREGON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Local storm report, Sep 4, 7:32 PM MDT, 2 hours 6 minutes before
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Local storm report, Sep 4, 7:38 PM MDT, 2 hours before
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Local storm report, Sep 4, 7:44 PM MDT, 1 hour 54 minutes before
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Local storm report, Sep 4, 8:52 PM MDT, 46 minutes before
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Local storm report, Sep 4, 9:16 PM MDT, 22 minutes before
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Local storm report, Sep 4, 9:17 PM MDT, 21 minutes before
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The office that day

Everything else NWS Boise, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 4, 6:05 PM MDTFlash Flood WarningBOIGooding, Jerome, Twin Falls85 min
Sep 4, 6:17 PM MDTSpecial Weather StatementBOIAda43 min
Sep 4, 6:18 PM MDTSevere Thunderstorm WarningBOIGooding, Jerome, Twin Falls57 min
Sep 4, 7:03 PM MDTFlash Flood WarningBOIAda, Canyon, Owyhee117 min
Sep 5, 1:08 AM MDTSpecial Weather StatementBOIAdams, Gem, Payette, Washington52 min
Sep 5, 6:12 AM MDTSpecial Weather StatementBOI63 min
Sep 5, 8:08 AM MDTSpecial Weather StatementBOIWashington52 min
Sep 5, 1:07 PM MDTSpecial Weather StatementBOI53 min
Sep 5, 2:02 PM MDTSevere Thunderstorm WarningBOICanyon, Owyhee43 min
Sep 5, 2:45 PM MDTSevere Thunderstorm WarningBOIAda, Canyon, Owyhee60 min
Sep 5, 3:12 PM MDTFlash Flood WarningBOICamas2 hr
Sep 5, 3:41 PM MDTFlash Flood WarningBOIOwyhee94 min
Sep 5, 3:43 PM MDTSevere Thunderstorm WarningBOIAda, Canyon, Owyhee62 min
Sep 5, 3:59 PM MDTAreal Flood AdvisoryBOIAda, Canyon3 hr
Sep 5, 4:11 PM MDTSevere Thunderstorm WarningBOIBoise, Gem, Payette, Valley, Washington64 min
Sep 5, 4:44 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls46 min
Sep 5, 4:52 PM MDTSevere Thunderstorm WarningBOIAdams, Gem, Valley, Washington38 min
Sep 5, 4:55 PM MDTFlash Flood WarningBOIAdams, Boise, Gem, Valley, Washington50 min
Sep 5, 5:05 PM MDTSevere Thunderstorm WarningBOIElmore, Gooding, Owyhee, Twin Falls40 min
Sep 5, 5:10 PM MDTSevere Thunderstorm WarningBOIBoise, Valley35 min
Sep 5, 5:23 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls37 min
Sep 5, 5:27 PM MDTSevere Thunderstorm WarningBOIAdams, Valley48 min
Sep 5, 5:55 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls50 min
Sep 5, 5:59 PM MDTAreal Flood AdvisoryBOIJerome, Twin Falls3 hr
Sep 4, 11:06 PM MDTAreal Flood WarningBOIHarney, Malheur6 hr

Nearby

Flash Flood Warnings in Idaho, 2013Every flash flood warning in 2013

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.