Alert archive / Colorado / Winter Storm Warnings in 2016
Winter Storm Warning 20, NWS Grand Junction, CO
NWS Grand Junction, CO issued this winter storm warning at Dec 21, 2016, 3:13 PM MST for 13 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Dec 22, 2016, 5:00 AM MST. It was in force for 27 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
- Dec 21, 2016, 3:13 PM MST (22:13 UTC)
- In effect from
- Dec 22, 2016, 5:00 AM MST
- Expired
- Dec 23, 2016, 8:00 AM MST
- In force
- 27 hr
- Issued by
- NWS Grand Junction, CO
Counties Archuleta County, CO, Delta County, CO, Dolores County, CO, Garfield County, CO, Gunnison County, CO, Hinsdale County, CO, La Plata County, CO, Mesa County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, San Juan County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT
The radar
The Grand Junction radar (KGJX), 100 km from the middle of the area, began a volume at 22:16 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
Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 10.2 hours before the alert went out and 373 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
- 2666 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before this winter storm warning went out at Dec 21, 11:03 AM MST, 4 hours 10 minutes earlier.
Area forecast discussion, Dec 21, 11:03 AM MST, 4 hours 10 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>Hazardous weather outlook, Dec 21, 5:42 AM MST, 9 hours 31 minutes before
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
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 3:13 PM MST | Winter Weather Advisory | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 10 more | 41 hr |
Nearby
Winter Storm Warnings in Colorado, 2016Winter Storm Warnings in Utah, 2016Every winter storm warning in 2016
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.