Alert archive / Idaho / Special Weather Statements in 2019
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Aug 7, 2019, 4:06 PM PDT for Lewis County, Idaho. It was in force for 24 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
- Aug 7, 2019, 4:06 PM PDT (23:06 UTC)
- Expired
- Aug 7, 2019, 4:30 PM PDT
- In force
- 24 min
- Issued by
- NWS Missoula, MT
County Lewis County, ID
The radar
The Pendleton radar (KPDT), 193 km from the middle of the area, began a volume at 23:08 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 text
As transmitted.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<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.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</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 Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Aug 7, 2:25 PM PDT, 1 hour 41 minutes earlier.
Area forecast discussion, Aug 7, 2:25 PM PDT, 1 hour 41 minutes before
Area Forecast Discussion National Weather Service Missoula MT 325 PM MDT Wed Aug 7 2019 ...SIGNIFICANT RAIN ACROSS NORTHERN ROCKIES FRIDAY, SATURDAY... .DISCUSSION... Showers and thunderstorms will be developing at times across the Northern Rockies (both day and night) through Thursday night. Waves of moisture and instability from south and west of the region will result in highly variable conditions throughout the area. There are significant disagreements between convective allowing models (such as the HRRR, NAMNest) and global models (such as GFS, ECMWF, Canadian) during the near-term forecast. Considering that convection is already underway and the favorable elements of convection are only just beginning to present, our current forecast reflects much greater weight upon convective allowing models than global models. Also, tonight and Thursday night appear to have the sufficient ingredients for thunderstorms to develop even in the absence of daytime heating. The next 36 hours will be just the beginning of an extended active weather period. Friday morning, a upper level disturbance tracking northward across the Great Basin into the Northern Rockies will transport an abnormally moist air mass into the area. A mid level circulation associated with this disturbance will wrap additional mid to upper level moisture into the Northern Rockies from the Midwest. The presence of near record levels of atmospheric moisture, slow storm motions, and high freezing levels will create an environment favorable for thunderstorms to produce heavy rainfall. Flash flooding is a concern, especially for urban areas and recent wildfire burn scar areas. On Saturday, a large area of low pressure will move onshore into the Pacific Northwest and move northeastwards into the Northern Rockies. This will help initiate another round of widespread showers and thunderstorms across the area Saturday. Atmospheric moisture will remain uncharacteristically high; therefore, another round of flash flooding will be possible. A few strong to potentially severe thunderstorms will also be possible across north central Idaho and west central Montana, including the Bitterroot and Missoula valleys, during the late afternoon and early evening hours. These storms could produce large hail along with heavy rainfall. Sunday and Sunday night, the low pressure circulation is anticipated to move to the north and east of the Northern Rockies, leaving very cool daytime temperatures (up to 20 degrees below seasonal average) and widespread precipitation across the region. Thunderstorms remain a possibility during this time, however the intensity will be trending downward. Monday through middle of next week, zonal (west to east) flow aloft will be present over the Northern Rockies. The airmass overhead will remain relatively cool for mid August, with daytime temperatures staying slightly below the seasonal average. Conditions will be mostly drying, however that drying may be short-lived, with global models suggesting another widespread precipitation event late next week through the weekend. && .AVIATION... Showers and thunderstorms are anticipated to develop throughout the next 24 hours across north central Idaho and southwest Montana. Among area terminals, KSMN will be most favorable for a thunderstorm nearby in the 08/0000Z through 08/0300Z period. There is a bit more uncertainty about thunderstorms near KBTM, with the target period of 07/2300Z through 08/0200Z, and then again 08/0600Z through 08/1000Z. KMSO has a relatively low chance of thunderstorms in the 08/0400Z through 08/1000Z period. Isolated terrain obscurations will be present KMSO and areas south, mainly due to the nocturnal thunderstorm development. Thunderstorms will become widespread south of KMSO after 08/1800Z. Terrain obscurations will become more widespread KMSO southward after 08/1800Z. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...&&
In the hours before
Special weather statement, Aug 7, 4:06 PM PDT, 0 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<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.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 1:29 PM PDT | Fire Weather Watch | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Lewis and Clark, Madison and 4 more | 13 hr |
Nearby
Special Weather Statements in Idaho, 2019Every special weather statement 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; radar from the NEXRAD Level II archive.