Alert archive / Utah / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 39, NWS Grand Junction, CO
NWS Grand Junction, CO issued this severe thunderstorm warning at Oct 6, 2010, 3:15 PM MDT for Grand County, San Juan County, Utah. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 6, 2010, 3:15 PM MDT (21:15 UTC)
- Expired
- Oct 6, 2010, 4:00 PM MDT
- In force
- 45 min
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Grand County, UT, San Juan County, UT
The radar
The Grand Junction radar (KGJX), 153 km from the middle of the area, began a volume at 21:17 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 6, 10:29 AM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 9.3 hours before the alert went out and 138 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
- 145 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Oct 6, 11:22 AM MDT, 3 hours 53 minutes earlier.
Area forecast discussion, Oct 6, 11:22 AM MDT, 3 hours 53 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, Oct 6, 11:36 AM MDT, 3 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 1136 AM MDT WED OCT 6 2010 COZ001>014-017>023-UTZ022>025-027>029-071130- ANIMAS RIVER BASIN-ARCHES/GRAND FLAT-CANYONLANDS/NATURAL BRIDGES- CENTRAL COLORADO RIVER BASIN- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- CENTRAL YAMPA RIVER BASIN-DEBEQUE TO SILT CORRIDOR- EASTERN UINTA BASIN-EASTERN UINTA MOUNTAINS- ELKHEAD AND PARK MOUNTAINS-FLAT TOPS- FOUR CORNERS/UPPER DOLORES RIVER- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAINS-GRAND AND BATTLEMENT MESAS- GRAND VALLEY-LA SAL AND ABAJO MOUNTAINS-LOWER YAMPA RIVER BASIN- NORTHWEST SAN JUAN MOUNTAINS-PARADOX VALLEY/LOWER DOLORES RIVER- ROAN AND TAVAPUTS PLATEAUS-SAN JUAN RIVER BASIN-SOUTHEAST UTAH- SOUTHWEST SAN JUAN MOUNTAINS-TAVAPUTS PLATEAU- UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE-UPPER GUNNISON RIVER VALLEY- UPPER YAMPA RIVER BASIN-WEST ELK AND SAWATCH MOUNTAINS- 1136 AM MDT WED OCT 6 2010 ...FLASH FLOOD WATCH FOR EAST CENTRAL AND SOUTHEAST UTAH UNTIL 9 PM MDT THIS EVENING... ...TORNADO WATCH FOR EAST CENTRAL AND SOUTHEST UTAH UNTIL 6 PM MDT TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...REST OF TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS WILL BE WIDESPREAD ACROSS MOST OF THE AREA THROUGH THIS EVENING. HEAVY RAIN CAN BE EXPECTED AT TIMES WITH SOUTHEAST UTAH SET TO RECEIVE THE HEAVIEST PRECIPITATION. FLASH FLOODING WILL BE POSSIBLE OVER EASTERN UTAH FROM THE EASTERN TAVAPUTS PLATEAU SOUTHWARD TO THE ARIZONA BORDER. IN ADDITION...THERE IS A GOOD CHANCE FOR SEVERE THUNDERSTORMS MAINLY SOUTH OF INTERSTATE 70 IN SOUTHEAST UTAH AND SOUTHWEST COLORADO TODAY. FOR MORE INFORMATION ON POTENTIAL SEVERE WEATHER AND WATCH ISSUANCES...PLEASE CHECK THE STORM PREDICTION CENTER WEBSITE AT WWW.SPC.NOAA.GOV. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS WILL INCREASE AGAIN EARLY THURSDAY CONTINUING THROUGH THURSDAY NIGHT AS A TROUGH OF LOW PRESSURE APPROACHES FROM THE GREAT BASIN. A FEW STORMS MAY BE SEVERE THURSDAY AFTERNOON WITH LARGE HAIL AND GUSTY WINDS TO 60 MPH POSSIBLE. THE CHANCE FOR SHOWERS AND THUNDERSTORMS WILL SLOWLY DIMINISH FROM THE SOUTHWEST ON FRIDAY THROUGH FRIDAY EVENING AS THE TROUGH MOVES TO THE EAST. A FEW MOUNTAIN RAIN OR SNOW SHOWERS WILL CONTINUE TO BE POSSIBLE EACH AFTERNOON NORTH OF INTERSTATE 70 THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY AND AGAIN ON THURSDAY. PRINGLE
In the hours before
Local storm report, Oct 6, 3:00 PM MDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
300 PM MDT WED OCT 06 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0253 PM HAIL 8 S GREEN RIVER 38.87N 110.09W
10/06/2010 E1.75 INCH GRAND UT PUBLIC
&&
EVENT NUMBER GJT1000687
BKThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 3:12 PM MDT | Severe Thunderstorm Warning | GJT | Dolores, Montezuma | 48 min |
| Oct 6, 3:40 PM MDT | Severe Thunderstorm Warning | GJT | La Plata, Montezuma | 50 min |
| Oct 6, 3:59 PM MDT | Severe Thunderstorm Warning | GJT | Rio Blanco | 46 min |
| Oct 6, 3:59 PM MDT | Severe Thunderstorm Warning | GJT | Dolores, Montezuma | 46 min |
| Oct 6, 4:14 PM MDT | Severe Thunderstorm Warning | GJT | Dolores, San Miguel | 32 min |
| Oct 6, 4:59 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Rio Blanco | 46 min |
| Oct 6, 2:32 PM MDT | Severe Thunderstorm Warning | GJT | Grand | 43 min |
| Oct 6, 2:41 PM MDT | Severe Thunderstorm Warning | GJT | San Juan | 49 min |
| Oct 6, 3:13 PM MDT | Severe Thunderstorm Warning | GJT | Grand | 47 min |
| Oct 6, 4:14 PM MDT | Tornado Warning | GJT | Grand, Uintah | 16 min |
Nearby
Severe Thunderstorm Warnings in Utah, 2010Every severe thunderstorm warning in 2010
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.