Alert archive / Idaho / Areal Flood Advisories in 2019

Areal Flood Advisory 21, NWS Spokane, WA

June 1, 2019Benewah County, Latah County, Idaho

NWS Spokane, WA issued this areal flood advisory at Jun 1, 2019, 12:38 PM PDT for Benewah County, Latah County, Idaho. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 1, 2019, 12:38 PM PDT (19:38 UTC)
Expired: Jun 1, 2019, 3:45 PM PDT
In force: 3 hr
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Benewah County, ID, Latah County, ID

The radar

The Spokane radar (KOTX), 102 km from the middle of the area, began a volume at 19:40 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, 7.6 hours before the alert went out and 385 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: 1710 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 10 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Spokane, WA wrote its last area forecast discussion before this areal flood advisory went out at Jun 1, 11:15 AM PDT, 1 hour 23 minutes earlier.

Area forecast discussion, Jun 1, 11:15 AM PDT, 1 hour 23 minutes before

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Hazardous weather outlook, Jun 1, 4:31 AM PDT, 8 hours 7 minutes before

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In the hours before

Special weather statement, Jun 1, 11:41 AM PDT, 57 minutes before

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The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 5:09 PM PDT	Areal Flood Advisory	OTX	Pend Oreille	2 hr
May 31, 5:50 PM PDT	Special Weather Statement	OTX	Stevens	40 min
May 31, 6:31 PM PDT	Flash Flood Warning	OTX	Okanogan	59 min
Jun 1, 11:41 AM PDT	Special Weather Statement	OTX	Asotin	34 min
May 31, 5:53 PM PDT	Special Weather Statement	OTX	Kootenai	52 min
May 31, 7:00 PM PDT	Special Weather Statement	OTX	Kootenai	30 min
Jun 1, 12:43 PM PDT	Areal Flood Advisory	OTX	Shoshone	2 hr

Nearby

Areal Flood Advisories in Idaho, 2019 Every areal flood advisory in 2019

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.