Alert archive / Colorado / Special Weather Statements in 2023
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Aug 6, 2023, 2:36 PM MDT for Larimer County, Colorado. 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 6, 2023, 2:36 PM MDT (20:36 UTC)
- Expired
- Aug 6, 2023, 3:00 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Hail
- 0.75 in
- Wind
- 30
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 64 km from the middle of the area, began a volume at 20:38 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
Grand Junction, CO (KGJT), launched 12:00Z, 8.6 hours before the alert went out and 323 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
- 2777 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 153 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 Aug 6, 11:56 AM MDT, 2 hours 40 minutes earlier.
Area forecast discussion, Aug 6, 11:56 AM MDT, 2 hours 40 minutes before
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<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.
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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, Aug 6, 11:26 AM MDT, 3 hours 10 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1126 AM MDT Sun Aug 6 2023 COZ030>051-071730- 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- 1126 AM MDT Sun Aug 6 2023 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered showers and thunderstorms will occur over the mountains and foothills this afternoon and over the Palmer Divide by mid afternoon. A couple of the storms could produce large hail and damaging wind gusts, especially over the Palmer Divide. The threat of flash flooding will remain very limited and mainly over the burn areas. Over the plains, isolated to scattered showers and thunderstorms are expected this evening. Strong wind gusts are possible with the storms. .DAYS TWO THROUGH SEVEN...Monday through Saturday Scattered afternoon thunderstorms can be expected Monday and Tuesday, and a few storms could be severe especially east of the I-25 Corridor. Large hail and damaging winds would be the main threats. Drier conditions are expected Wednesday. Scattered showers and a few storms could redevelop later in the week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight.
In the hours before
Special weather statement, Aug 6, 2:36 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Denver CO
236 PM MDT Sun Aug 6 2023
COZ035-038-062100-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
236 PM MDT Sun Aug 6 2023
...A strong thunderstorm will impact portions of east central Larimer
County through 300 PM MDT...
At 235 PM MDT, Doppler radar was tracking a strong thunderstorm 4
miles south of Red Feather Lakes, or 27 miles northwest of Fort
Collins, moving east at 35 mph.
HAZARD...Winds in excess of 30 mph and penny size hail, and brief
heavy rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Stove Prairie, Mishawaka, Livermore, Red Feather Lakes, Teds Place,
Rustic, Poudre Park and Buckhorn Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4082 10516 4055 10518 4065 10560 4083 10559
TIME...MOT...LOC 2035Z 277DEG 34KT 4075 10553
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH
COOPERThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 7:33 PM MDT | Special Weather Statement | BOU | Broomfield | 42 min |
| Aug 5, 7:49 PM MDT | Special Weather Statement | BOU | Lincoln | 41 min |
| Aug 5, 8:13 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 47 min |
| Aug 5, 8:55 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 35 min |
| Aug 6, 3:38 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver | 25 min |
| Aug 6, 3:55 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 24 min |
| Aug 6, 4:01 PM MDT | Special Weather Statement | BOU | Jackson | 29 min |
| Aug 6, 4:05 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 25 min |
| Aug 6, 4:12 PM MDT | Severe Thunderstorm Warning | BOU | Jackson, Larimer | 33 min |
| Aug 6, 4:35 PM MDT | Areal Flood Advisory | BOU | Larimer | 85 min |
| Aug 6, 4:39 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 36 min |
| Aug 6, 5:04 PM MDT | Areal Flood Advisory | BOU | Larimer | 86 min |
| Aug 6, 5:16 PM MDT | Areal Flood Advisory | BOU | Grand | 119 min |
| Aug 6, 5:17 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 43 min |
Nearby
Special Weather Statements in Colorado, 2023Every special weather statement in 2023
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.