Alert archive / Idaho / Flash Flood Watches in 2011

Flash Flood Watch 3, NWS Boise, ID

July 31, 201111 counties in Idaho; Malheur County, Oregon

NWS Boise, ID issued this flash flood watch at Jul 31, 2011, 3:42 AM MDT for 11 counties in Idaho; Malheur County, Oregon. It took effect at Jul 31, 2011, 12:00 PM MDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jul 31, 2011, 3:42 AM MDT (09:42 UTC)
In effect from: Jul 31, 2011, 12:00 PM MDT
Expired: Aug 1, 2011, 3:45 AM MDT
In force: 16 hr
Issued by: NWS Boise, ID
Flood severity: None

Counties Adams County, ID, Boise County, ID, Camas County, ID, Elmore County, ID, Gem County, ID, Gooding County, ID, Jerome County, ID, Owyhee County, ID, Twin Falls County, ID, Valley County, ID, Washington County, ID, Malheur County, OR

The radar

The Boise radar (KCBX), 42 km from the middle of the area, began a volume at 09:44 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.

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Jul 30, 8:41 PM MDT, 7 hours 1 minute earlier.

Area forecast discussion, Jul 30, 8:41 PM MDT, 7 hours 1 minute before

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Hazardous weather outlook, Jul 30, 6:32 AM MDT, 21 hours 10 minutes before

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In the hours before

Local storm report, Jul 30, 11:02 PM MDT, 4 hours 40 minutes before

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<body>
  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
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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 30, 7:24 PM MDT	Special Weather Statement	BOI	Ada	21 min
Jul 31, 2:30 PM MDT	Flash Flood Watch	BOI	Boise, Camas, Elmore, Gooding, Jerome, Twin Falls	13 hr
Jul 31, 5:03 PM MDT	Red Flag Warning	BOI		11 hr

Nearby

Flash Flood Watches in Idaho, 2011 Flash Flood Watches in Oregon, 2011 Every flash flood watch in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.