Alert archive / Utah / Special Weather Statements in 2021
Special Weather Statement, NWS Grand Junction, CO
NWS Grand Junction, CO issued this special weather statement at Aug 2, 2021, 5:12 PM MDT for San Juan County, Utah. It was in force for 48 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 2, 2021, 5:12 PM MDT (23:12 UTC)
- Expired
- Aug 2, 2021, 6:00 PM MDT
- In force
- 48 min
- Issued by
- NWS Grand Junction, CO
County San Juan County, UT
The radar
The Cedar City radar (KICX), 220 km from the middle of the area, began a volume at 23:12 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, 11.2 hours before the alert went out and 255 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
- 22 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 55 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 Grand Junction, CO wrote its last area forecast discussion before this special weather statement went out at Aug 2, 4:00 PM MDT, 1 hour 12 minutes earlier.
Area forecast discussion, Aug 2, 4:00 PM MDT, 1 hour 12 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>
<p class="small" id="detail">
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 2, 4:34 AM MDT, 12 hours 38 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 434 AM MDT Mon Aug 2 2021 COZ001>014-017>023-UTZ022>025-027>029-031200- Lower Yampa River Basin-Central Yampa River Basin- Roan and Tavaputs Plateaus-Elkhead and Park Mountains- Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor- Central Colorado River Basin-Grand and Battlement Mesas- Gore and Elk Mountains/Central Mountain Valleys- Central Gunnison and Uncompahgre River Basin- West Elk and Sawatch Mountains-Flat Tops- Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide- Northwest San Juan Mountains-Southwest San Juan Mountains- Paradox Valley/Lower Dolores River- Four Corners/Upper Dolores River-Animas River Basin- San Juan River Basin-Southeast Utah-Eastern Uinta Mountains- Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat- La Sal and Abajo Mountains-Canyonlands/Natural Bridges- 434 AM MDT Mon Aug 2 2021 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Widespread showers and thunderstorms are expected today with the best potential of heavy rain and flash flooding over the higher terrain of western Colorado and recent burn scars as deep monsoonal moisture remains in place. Storms will continue into the overnight hours. Expect heavy rain, frequent lightning, gusty outflow winds to 40 mph and hail with stronger storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Scattered showers and thunderstorms can be expected each day. Moderate to heavy rain, gusty winds and lightning will be the primary threats with storms. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected today or tonight, however spotters are encouraged to relay rainfall amounts or any observed flooding to the National Weather Service in Grand Junction.
In the hours before
Special weather statement, Aug 2, 2:16 PM MDT, 2 hours 56 minutes before
Special Weather Statement National Weather Service Grand Junction CO 216 PM MDT Mon Aug 2 2021 COZ019>021-UTZ028-022045- Southwest San Juan Mountains CO- Paradox Valley/Lower Dolores River CO- Four Corners/Upper Dolores River CO-La Sal and Abajo Mountains UT- 216 PM MDT Mon Aug 2 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DOLORES AND WEST CENTRAL SAN MIGUEL COUNTIES UNTIL 245 PM MDT... At 215 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles north of Dove Creek, moving east at 20 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Egnar. This includes Colorado 141 between mile markers 3 and 12. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3786 10906 3795 10902 3795 10877 3774 10880 TIME...MOT...LOC 2015Z 288DEG 18KT 3788 10896 Miller
Special weather statement, Aug 2, 2:49 PM MDT, 2 hours 23 minutes before
Special Weather Statement
National Weather Service Grand Junction CO
249 PM MDT Mon Aug 2 2021
COZ001-022115-
Lower Yampa River Basin CO-
249 PM MDT Mon Aug 2 2021
...SPECIAL WEATHER STATEMENT...
At 248 PM MDT, Doppler radar was tracking a strong thunderstorm 13
miles southwest of Rangely moving northeast at 15 mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Rangely.
This includes the following highways...
Colorado 64 between mile markers 14 and 16.
Colorado 139 between mile markers 61 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3985 10887 3987 10900 3991 10904 4012 10888
4001 10865
TIME...MOT...LOC 2048Z 214DEG 11KT 3994 10894
ERWLocal storm report, Aug 2, 3:43 PM MDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
343 PM MDT MON AUG 2 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM HEAVY RAIN 2 SSW VERNAL 40.43N 109.55W
08/02/2021 M0.52 INCH UINTAH UT PUBLIC
&&Special weather statement, Aug 2, 3:55 PM MDT, 1 hour 17 minutes before
Special Weather Statement National Weather Service Grand Junction CO 355 PM MDT Mon Aug 2 2021 COZ019-022230- Southwest San Juan Mountains CO- 355 PM MDT Mon Aug 2 2021 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DOLORES COUNTY UNTIL 430 PM MDT... At 354 PM MDT, Doppler radar was tracking a strong thunderstorm 14 miles northeast of Dolores, moving east at 15 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of central Dolores County. This includes Colorado 145 near mile marker 24. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3759 10841 3769 10845 3777 10828 3759 10818 TIME...MOT...LOC 2154Z 249DEG 13KT 3766 10838 Miller
Special weather statement, Aug 2, 4:57 PM MDT, 15 minutes before
Special Weather Statement
National Weather Service Grand Junction CO
457 PM MDT Mon Aug 2 2021
UTZ029-022345-
Canyonlands/Natural Bridges UT-
457 PM MDT Mon Aug 2 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SAN JUAN COUNTY UNTIL
545 PM MDT...
At 456 PM MDT, Doppler radar was tracking a strong thunderstorm near
Canyonlands National Park, moving east at 20 mph.
Nickel size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Canyonlands National Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3841 11000 3842 11001 3850 10979 3830 10964
3833 10996 3835 10994 3836 10995 3834 10996
3835 10998 3839 10997 3839 10999 3836 11001
3838 11001 3839 11003
TIME...MOT...LOC 2256Z 252DEG 16KT 3838 10999
MillerSpecial weather statement, Aug 2, 5:12 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Grand Junction CO
512 PM MDT Mon Aug 2 2021
UTZ029-030000-
Canyonlands/Natural Bridges UT-
512 PM MDT Mon Aug 2 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SAN JUAN COUNTY
UNTIL 600 PM MDT...
At 512 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Halls Crossing, moving southeast at 30 mph.
Half inch hail and wind gusts up to 50 mph will be possible with
this storm.
This storm will remain over mainly rural areas of southwestern San
Juan County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3745 11053 3757 11053 3735 11010 3733 11009
3733 11024 3732 11024 3732 11044 3730 11044
3730 11047 3745 11060
TIME...MOT...LOC 2312Z 309DEG 25KT 3746 11053
MillerThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 8:37 PM MDT | Areal Flood Advisory | GJT | Garfield, Mesa | 3 hr |
| Aug 2, 1:17 PM MDT | Areal Flood Advisory | GJT | Mesa, Montrose | 118 min |
| Aug 2, 2:16 PM MDT | Special Weather Statement | GJT | Dolores | 29 min |
| Aug 2, 2:30 PM MDT | Flash Flood Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 29 hr |
| Aug 2, 2:49 PM MDT | Special Weather Statement | GJT | Rio Blanco | 26 min |
| Aug 2, 3:55 PM MDT | Special Weather Statement | GJT | Dolores | 35 min |
| Aug 2, 4:57 PM MDT | Special Weather Statement | GJT | 48 min | |
| Aug 1, 6:35 PM MDT | Areal Flood Advisory | GJT | Uintah | 115 min |
| Aug 1, 6:41 PM MDT | Special Weather Statement | GJT | Uintah | 34 min |
| Aug 1, 7:03 PM MDT | Areal Flood Advisory | GJT | Grand | 3 hr |
| Aug 1, 8:56 PM MDT | Flash Flood Warning | GJT | Grand, San Juan | 109 min |
| Aug 1, 11:10 PM MDT | Flash Flood Warning | GJT | Grand, San Juan | 3 hr |
| Aug 2, 1:29 PM MDT | Areal Flood Advisory | GJT | San Juan | 2 hr |
| Aug 2, 4:37 PM MDT | Areal Flood Advisory | GJT | Uintah | 2 hr |
Nearby
Special Weather Statements in Utah, 2021Every special weather statement in 2021
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.