Alert archive / Idaho / Flash Flood Warnings in 2014

Flash Flood Warning 16, NWS Boise, ID

August 6, 2014Boise County, Elmore County, Idaho

NWS Boise, ID issued this flash flood warning at Aug 6, 2014, 4:03 PM MDT for Boise County, Elmore County, Idaho. It was in force for 3 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: Aug 6, 2014, 4:03 PM MDT (22:03 UTC)
Expired: Aug 6, 2014, 7:00 PM MDT
In force: 3 hr
Issued by: NWS Boise, ID
Area: Storm-based polygon
Flood severity: None

Counties Boise County, ID, Elmore County, ID

The radar

The Boise radar (KCBX), 55 km from the middle of the area, began a volume at 22:03 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 12:00Z, 10.1 hours before the alert went out and 50 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: 63 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 1716 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 143 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 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 Aug 6, 2:44 PM MDT, 1 hour 19 minutes earlier.

Area forecast discussion, Aug 6, 2:44 PM MDT, 1 hour 19 minutes before

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In the hours before

Local storm report, Aug 6, 10:09 AM MDT, 5 hours 54 minutes before

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Local storm report, Aug 6, 12:56 PM MDT, 3 hours 7 minutes before

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Local storm report, Aug 6, 2:51 PM MDT, 1 hour 12 minutes before

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Local storm report, Aug 6, 2:59 PM MDT, 1 hour 4 minutes before

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Special weather statement, Aug 6, 3:51 PM MDT, 12 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Aug 6, 3:54 PM MDT, 9 minutes before

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      <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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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 6:14 PM MDT	Flash Flood Warning	BOI	Ada, Boise, Elmore	3 hr
Aug 5, 6:26 PM MDT	Severe Thunderstorm Warning	BOI	Ada, Elmore	49 min
Aug 5, 6:58 PM MDT	Flash Flood Warning	BOI	Camas, Elmore	3 hr
Aug 5, 7:13 PM MDT	Flash Flood Warning	BOI	Camas, Elmore	3 hr
Aug 5, 10:12 PM MDT	Areal Flood Advisory	BOI	Owyhee	6 hr
Aug 6, 12:45 AM MDT	Areal Flood Advisory	BOI	Twin Falls	6 hr
Aug 6, 1:38 AM MDT	Areal Flood Warning	BOI	Jerome, Twin Falls	6 hr
Aug 6, 8:08 AM MDT	Areal Flood Warning	BOI	Elmore, Gooding, Jerome, Owyhee, Twin Falls	3 hr
Aug 6, 11:02 AM MDT	Areal Flood Warning	BOI	Gooding, Jerome, Owyhee, Twin Falls	9 hr
Aug 6, 2:44 PM MDT	Flash Flood Warning	BOI	Camas, Elmore	3 hr
Aug 6, 3:51 PM MDT	Special Weather Statement	BOI	Elmore	39 min
Aug 6, 3:54 PM MDT	Special Weather Statement	BOI	Boise	51 min
Aug 6, 4:13 PM MDT	Special Weather Statement	BOI	Boise	47 min
Aug 6, 4:48 PM MDT	Special Weather Statement	BOI	Boise	42 min
Aug 6, 5:28 PM MDT	Special Weather Statement	BOI	Ada	47 min

Nearby

Flash Flood Warnings in Idaho, 2014 Every flash flood warning in 2014

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.