Alert archive / Montana / Special Weather Statements in 2017
Special Weather Statement, NWS Glasgow, MT
NWS Glasgow, MT issued this special weather statement at Jul 20, 2017, 8:35 AM MDT for Valley County, Montana. It was in force for 55 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 20, 2017, 8:35 AM MDT (14:35 UTC)
- Expired
- Jul 20, 2017, 9:30 AM MDT
- In force
- 55 min
- Issued by
- NWS Glasgow, MT
County Valley County, MT
The radar
The Glasgow radar (KGGW), 50 km from the middle of the area, began a volume at 14:39 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
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 2.6 hours before the alert went out and 50 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2932 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 89 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 Glasgow, MT wrote its last area forecast discussion before this special weather statement went out at Jul 20, 8:14 AM MDT, 21 minutes earlier.
Area forecast discussion, Jul 20, 8:14 AM MDT, 21 minutes before
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<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.
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</html>Hazardous weather outlook, Jul 20, 3:21 AM MDT, 5 hours 14 minutes before
Hazardous Weather Outlook National Weather Service Glasgow MT 321 AM MDT Thu Jul 20 2017 MTZ016>027-059>062-210930- Central and Southeast Phillips-Central and Southern Valley- Daniels-Sheridan-Western Roosevelt-Petroleum-Garfield-McCone- Richland-Dawson-Prairie-Wibaux-Northern Phillips- Southwest Phillips-Northern Valley-Eastern Roosevelt- 321 AM MDT Thu Jul 20 2017 This Hazardous Weather Outlook is for portions of northeast Montana. .DAY ONE...Today and Tonight A Red Flag Warning for low relative humidity and gusty wind is in effect for this afternoon and evening for southwest portions of Northeast Montana. There is the possibility of strong thunderstorms for eastern areas of Northeast Montana this afternoon and evening. A few storms may become severe with damaging winds and large hail. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Critical Fire Weather conditions are possible for all zones Friday due to low relative humidity and strong northwest wind. The winds may also produce hazardous boating conditions on Fort Peck Lake Friday afternoon. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures.
In the hours before
Special weather statement, Jul 20, 8:35 AM MDT, 0 minutes before
Special Weather Statement National Weather Service Glasgow MT 835 AM MDT THU JUL 20 2017 MTZ016-017-059-061-201530- Central and Southeast Phillips MT-Northern Valley MT- Northern Phillips MT-Central and Southern Valley MT- 835 AM MDT THU JUL 20 2017 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL PHILLIPS AND NORTHWESTERN VALLEY COUNTIES UNTIL 930 AM MDT... At 835 AM MDT, Doppler radar was tracking a strong thunderstorm near Saco, or 21 miles east of Malta, moving northeast at 30 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Saco and Hinsdale. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 4828 10741 4843 10760 4882 10690 4851 10655 TIME...MOT...LOC 1435Z 235DEG 27KT 4840 10741 HICKFORD
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 3:18 AM MDT | Red Flag Warning | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 42 hr |
| Jul 20, 11:49 AM MDT | Special Weather Statement | GGW | Roosevelt, Sheridan | 56 min |
| Jul 20, 1:47 PM MDT | Special Weather Statement | GGW | Daniels | 43 min |
| Jul 20, 2:08 PM MDT | Special Weather Statement | GGW | Sheridan | 52 min |
| Jul 20, 2:14 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 19 min |
| Jul 20, 2:39 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more | 54 hr |
| Jul 20, 2:40 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 13 hr |
Nearby
Special Weather Statements in Montana, 2017Every special weather statement in 2017
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.