Alert archive / Idaho / Red Flag Warnings in 2007

Red Flag Warning 5, NWS Boise, ID

July 17, 20077 counties in Idaho

NWS Boise, ID issued this red flag warning at Jul 17, 2007, 10:35 AM MDT for 7 counties in Idaho. It took effect at Jul 18, 2007, 2:35 AM MDT. It was in force for 18 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 17, 2007, 10:35 AM MDT (16:35 UTC)
In effect from: Jul 18, 2007, 2:35 AM MDT
Expired: Jul 18, 2007, 9:00 PM MDT
In force: 18 hr
Issued by: NWS Boise, ID

Counties Adams County, ID, Boise County, ID, Gem County, ID, Idaho County, ID, Payette County, ID, Valley County, ID, Washington County, ID

The radar

The Boise radar (KCBX), 121 km from the middle of the area, began a volume at 16:35 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, 4.6 hours before the alert went out and 112 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: 3122 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 172 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 red flag 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 red flag warning went out at Jul 17, 9:55 AM MDT, 40 minutes earlier.

Area forecast discussion, Jul 17, 9:55 AM MDT, 40 minutes before

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Hazardous weather outlook, Jul 17, 5:15 AM MDT, 5 hours 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 2:28 PM MDT	Severe Thunderstorm Warning	BOI	Twin Falls	47 min
Jul 17, 5:41 PM MDT	Flash Flood Warning	BOI	Camas	64 min

Nearby

Red Flag Warnings in Idaho, 2007 Red Flag Warnings in Oregon, 2007 Every red flag warning in 2007

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.