Alert archive / Colorado / Special Weather Statements in 2020
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at May 19, 2020, 9:25 PM MDT for Lincoln County, Colorado. 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
- May 19, 2020, 9:25 PM MDT (03:25 UTC)
- Expired
- May 19, 2020, 10:00 PM MDT
- In force
- 35 min
- Issued by
- NWS Denver/Boulder, CO
County Lincoln County, CO
The radar
The Pueblo radar (KPUX), 90 km from the middle of the area, began a volume at 03:25 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
Denver, CO (KDNR), launched 00:00Z, 3.4 hours before the alert went out and 118 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
- 14 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 3793 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Denver/Boulder, CO wrote its last area forecast discussion before this special weather statement went out at May 19, 7:43 PM MDT, 1 hour 42 minutes earlier.
Area forecast discussion, May 19, 7:43 PM MDT, 1 hour 42 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, May 19, 11:05 AM MDT, 10 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1105 AM MDT Tue May 19 2020 COZ030>051-201715- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1105 AM MDT Tue May 19 2020 ...RED FLAG WARNING IN EFFECT TODAY AND TOMORROW FOR SOUTH PARK...SOUTHERN FOOTHILLS AND PALMER DIVIDE... ...SEVERE STORM THREAT INCREASES INTO WEDNESDAY... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Low humidity and gusty winds will spread over the high country, southern foothills and Palmer Divide today where drier vegetation will create high fire danger. Isolated to scattered thunderstorms will be high based over these areas as well, with a slight chance of dry lightning. Any outdoor burning is highly discouraged as fire spread would be rapid. Thunderstorms across the high terrain will move east this afternoon into the plains. These showers and storms could produce wind gusts up to 60 mph and small hail. Large hail up to 1 inch in diameter will be possible over Larimer and Weld Counties. South-southeasterly winds across the far eastern plains will be strong all afternoon and into the evening, with sustained speeds of 20 to 30 mph and gusts up to 40 mph. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Severe thunderstorms will be possible over portions of northeast Colorado late Wednesday afternoon through Wednesday evening. A dryline will become better defined across the northeast plains Wednesday afternoon. That will most likely set up from northeastern Weld County/Logan County through the Fort Morgan area and then down toward Limon. That should be the focus for thunderstorm development. Sufficient wind shear and instability will support the threat of large hail, damaging winds, and even a couple tornadoes. Further west, fire danger will continue to be an issue with low humidity and strong gusty winds. Most areas will see wind gusts of 30 to 40 mph, with gusts around 45 mph across the Palmer Divide. The rest of the week into the weekend will feature a couple chances of showers and storms, but no severe weather is expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today or tonight.
In the hours before
Special weather statement, May 19, 4:54 PM MDT, 4 hours 31 minutes before
Special Weather Statement National Weather Service Denver CO 454 PM MDT Tue May 19 2020 COZ033-035-192330- Larimer and Boulder Counties Between 6000 and 9000 Feet CO- South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet CO- 454 PM MDT Tue May 19 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LARIMER COUNTY UNTIL 530 PM MDT... At 453 PM MDT, Doppler radar was tracking a strong thunderstorm over Red Feather Lakes, or 31 miles northwest of Fort Collins, moving northeast at 40 mph. Wind gusts of 50 to 55 mph will be possible with this storm. Locations impacted include... Rustic, Cherokee Park, Virginia Dale and Red Feather Lakes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for sudden gusty winds. Secure loose objects and move to a safe shelter inside a building or vehicle. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4066 10549 4074 10575 4100 10559 4100 10525 TIME...MOT...LOC 2253Z 205DEG 35KT 4081 10558 RPK
Special weather statement, May 19, 4:59 PM MDT, 4 hours 26 minutes before
Special Weather Statement National Weather Service Denver CO 459 PM MDT Tue May 19 2020 COZ035-038-192330- Larimer and Boulder Counties Between 6000 and 9000 Feet CO- Larimer County Below 6000 Feet/Northwest Weld County CO- 459 PM MDT Tue May 19 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WELD AND NORTHEASTERN LARIMER COUNTIES UNTIL 530 PM MDT... At 459 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 8 miles southeast of Crystal Lake Campground to 5 miles southeast of Livermore, or along a line extending from 13 miles west of Cheyenne to 14 miles north of Fort Collins. Movement was north at 35 mph. Half inch hail and wind gusts of 50 to 55 mph will be possible with these storms. Locations impacted include... Wellington, Carr, Natural Fort, Poudre Park, Livermore and Teds Place. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for sudden gusty winds. Secure loose objects and move to a safe shelter inside a building or vehicle. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4100 10484 4064 10492 4064 10531 4100 10529 TIME...MOT...LOC 2259Z 200DEG 29KT 4110 10505 4076 10513 RPK
Special weather statement, May 19, 5:14 PM MDT, 4 hours 11 minutes before
Special Weather Statement
National Weather Service Denver CO
514 PM MDT Tue May 19 2020
COZ041-044>047-200000-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County CO-Morgan County CO-
Southeast Elbert County Below 6000 Feet/South Lincoln County CO-
Central and East Adams and Arapahoe Counties CO-
514 PM MDT Tue May 19 2020
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN ELBERT...EASTERN
ARAPAHOE...SOUTHWESTERN MORGAN...EASTERN ADAMS AND SOUTHWESTERN
LINCOLN COUNTIES UNTIL 600 PM MDT...
At 513 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 3 miles north of Leader to 13 miles south of
Truckton, or along a line extending from 24 miles southwest of Fort
Morgan to 33 miles northeast of Pueblo. Movement was north at 35 mph.
Half inch hail and wind gusts of 50 to 55 mph will be possible with
these storms.
Locations impacted include...
Simla, Deer Trail, Hoyt, Shamrock, Leader, Matheson, Adena, Agate,
Twelve-Mile Corner, Cottonwood Valley and Kutch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3913 10405 3913 10415 4000 10418 4000 10415
4011 10415 4010 10368 3853 10379 3853 10405
TIME...MOT...LOC 2313Z 186DEG 31KT 3995 10405 3854 10409
RPKSpecial weather statement, May 19, 6:29 PM MDT, 2 hours 56 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>Special weather statement, May 19, 6:45 PM MDT, 2 hours 40 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>Special weather statement, May 19, 9:25 PM MDT, 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 Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 6:29 PM MDT | Special Weather Statement | BOU | Weld | 31 min |
| May 19, 6:45 PM MDT | Special Weather Statement | BOU | Denver | 30 min |
| May 20, 1:02 AM MDT | Special Weather Statement | BOU | Logan, Morgan, Washington | 43 min |
Nearby
Special Weather Statements in Colorado, 2020Every special weather statement in 2020
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.