Alert archive / Idaho / Special Weather Statements in 2021
Special Weather Statement, NWS Boise, ID
NWS Boise, ID issued this special weather statement at Jul 31, 2021, 6:40 PM MDT for Twin Falls County, Idaho. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2021, 6:40 PM MDT (00:40 UTC)
- Expired
- Jul 31, 2021, 7:15 PM MDT
- In force
- 35 min
- Issued by
- NWS Boise, ID
County Twin Falls County, ID
The radar
The Boise radar (KCBX), 168 km from the middle of the area, began a volume at 00:44 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.
The nearest sounding before it
Elko, NV (KLKN), launched 00:00Z, 0.7 hours before the alert went out and 169 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.
- Mixed-layer CAPE
- 84 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1100 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 31, 6:28 PM MDT, 12 minutes earlier.
Area forecast discussion, Jul 31, 6:28 PM MDT, 12 minutes before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>In the hours before
Special weather statement, Jul 31, 6:40 PM MDT, 0 minutes before
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<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<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.
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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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</html>The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 7:06 PM MDT | Flash Flood Warning | BOI | Owyhee, Twin Falls | 3 hr |
| Jul 31, 7:39 PM MDT | Flash Flood Warning | BOI | Twin Falls | 3 hr |
| Jul 31, 9:32 PM MDT | Special Weather Statement | BOI | Ada | 28 min |
| Jul 31, 9:33 PM MDT | Areal Flood Advisory | BOI | Elmore, Owyhee | 117 min |
| Jul 31, 10:12 PM MDT | Flash Flood Warning | BOI | Ada, Boise | 3 hr |
| Jul 31, 11:58 PM MDT | Flash Flood Warning | BOI | Canyon, Gem, Owyhee, Payette | 2 hr |
| Aug 1, 12:43 AM MDT | Areal Flood Advisory | BOI | Payette, Washington | 2 hr |
| Aug 1, 1:47 AM MDT | Areal Flood Advisory | BOI | Camas | 103 min |
| Aug 1, 1:11 PM MDT | Special Weather Statement | BOI | Twin Falls | 49 min |
| Aug 1, 1:25 PM MDT | Areal Flood Advisory | BOI | Twin Falls | 3 hr |
| Aug 1, 2:15 PM MDT | Special Weather Statement | BOI | Jerome | 60 min |
| Aug 1, 2:39 PM MDT | Flash Flood Warning | BOI | Elmore | 5 hr |
| Aug 1, 3:21 PM MDT | Areal Flood Advisory | BOI | Jerome, Twin Falls | 3 hr |
| Aug 1, 3:39 PM MDT | Flash Flood Warning | BOI | Camas, Elmore | 3 hr |
| Aug 1, 4:01 PM MDT | Flash Flood Warning | BOI | Owyhee | 3 hr |
| Aug 1, 4:49 PM MDT | Areal Flood Advisory | BOI | Elmore | 3 hr |
| Aug 1, 5:32 PM MDT | Flash Flood Warning | BOI | Elmore | 3 hr |
| Aug 1, 5:39 PM MDT | Areal Flood Advisory | BOI | Owyhee | 2 hr |
Nearby
Special Weather Statements in Idaho, 2021Every special weather statement in 2021
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.