Alert archive / Colorado / Special Weather Statements in 2017
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Jul 27, 2017, 3:29 PM MDT for Teller County, Colorado. It was in force for 31 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 27, 2017, 3:29 PM MDT (21:29 UTC)
- Expired
- Jul 27, 2017, 4:00 PM MDT
- In force
- 31 min
- Issued by
- NWS Denver/Boulder, CO
County Teller County, CO
The radar
The Pueblo radar (KPUX), 121 km from the middle of the area, began a volume at 21:29 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 (KDEN), launched 12:00Z, 9.5 hours before the alert went out and 220 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
- 1889 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 90 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 Denver/Boulder, CO wrote its last area forecast discussion before this special weather statement went out at Jul 27, 11:09 AM MDT, 4 hours 20 minutes earlier.
Area forecast discussion, Jul 27, 11:09 AM MDT, 4 hours 20 minutes before
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<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>
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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>Hazardous weather outlook, Jul 27, 11:21 AM MDT, 4 hours 8 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1121 AM MDT Thu Jul 27 2017 COZ030>051-281730- 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- 1121 AM MDT Thu Jul 27 2017 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered thunderstorms forming early this afternoon over the Front Range mountains and foothills will slowly drift east over the adjacent plains through the afternoon. Storm chances on the plains this afternoon will be greatest up along the Wyoming border, west of Interstate 25 and over the higher terrain of the Palmer Divide. A few storms near the Wyoming border could produce hail at least an inch in diameter, wind gusts to 60 mph and locally heavy rainfall. Storms elsewhere will be capable of wind gusts to 40 mph, brief heavy rainfall and perhaps some small hail. A quick inch of rain in under 30 minutes could cause local flooding of burn scars, streets and underpasses, and in locations that received heavy rain last night. Most of this storm activity should end by mid to late evening. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Scattered to numerous thunderstorms are expected Friday across the forecast area with a chance of stronger storms over the northern plains. Strong outflow winds, brief heavy rain and some hail will be possible. Similar conditions will be similar Saturday before moisture gets pushed southwest for Sunday and Monday, where storms will favor the high terrain slightly more. Brief heavy rain will remain a hazard with the storms as monsoonal moisture remains overhead or nearby. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight. However, any reports of rainfall greater than 1 inch or hail at least an inch in diameter will be appreciated. Baker/RJK
In the hours before
Special weather statement, Jul 27, 3:29 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Denver CO 329 PM MDT THU JUL 27 2017 COZ037-272200- Central and Southeast Park County CO- 329 PM MDT THU JUL 27 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PARK COUNTY UNTIL 400 PM MDT... At 329 PM MDT, Doppler radar was tracking a strong thunderstorm near Lake George, or 31 miles west of Colorado Springs, moving east at 5 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Lake George and Elevenmile Canyon Reservoir. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 3881 10555 3902 10554 3903 10533 3883 10533 TIME...MOT...LOC 2129Z 282DEG 5KT 3893 10539 RPK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 6:26 PM MDT | Areal Flood Advisory | BOU | Douglas | 2 hr |
| Jul 26, 6:34 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
| Jul 26, 7:09 PM MDT | Flash Flood Warning | BOU | Douglas, Elbert, Jefferson | 3 hr |
| Jul 26, 7:26 PM MDT | Areal Flood Advisory | BOU | Boulder | 3 hr |
| Jul 26, 7:50 PM MDT | Areal Flood Advisory | BOU | Douglas, Jefferson, Park | 115 min |
| Jul 26, 8:09 PM MDT | Flash Flood Warning | BOU | Park | 3 hr |
| Jul 26, 9:13 PM MDT | Areal Flood Advisory | BOU | Arapahoe, Denver | 2 hr |
| Jul 26, 9:55 PM MDT | Areal Flood Advisory | BOU | Lincoln | 2 hr |
| Jul 26, 11:22 PM MDT | Areal Flood Warning | BOU | Park | 6 hr |
| Jul 26, 11:31 PM MDT | Areal Flood Advisory | BOU | Douglas, Elbert | 3 hr |
| Jul 26, 11:48 PM MDT | River Flood Warning | BOU | Douglas | 11 hr |
| Jul 27, 3:19 PM MDT | Areal Flood Advisory | BOU | Park | 3 hr |
| Jul 27, 5:42 PM MDT | Special Weather Statement | BOU | Park | 33 min |
Nearby
Special Weather Statements in Colorado, 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.