Alert archive / Colorado / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 25, NWS Grand Junction, CO
NWS Grand Junction, CO issued this severe thunderstorm warning at Jul 19, 2011, 5:44 PM MDT for Moffat County, Routt County, Colorado. It was in force for 46 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
- Jul 19, 2011, 5:44 PM MDT (23:44 UTC)
- Expired
- Jul 19, 2011, 6:30 PM MDT
- In force
- 46 min
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Moffat County, CO, Routt County, CO
The radar
The Grand Junction radar (KGJX), 174 km from the middle of the area, began a volume at 23:44 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, 11.7 hours before the alert went out and 176 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
- 16 J/kg
- Mixed-layer CIN
- -180 J/kg
- Mixed-layer LCL
- 1696 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
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 Jul 19, 5:10 PM MDT, 34 minutes earlier.
Area forecast discussion, Jul 19, 5:10 PM MDT, 34 minutes before
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</html>Hazardous weather outlook, Jul 19, 4:31 AM MDT, 13 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 431 AM MDT TUE JUL 19 2011 COZ001>014-017>023-UTZ022>025-027>029-201130- 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- 431 AM MDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT... MONSOONAL MOISTURE WILL CONTINUE ACROSS THE FORECAST AREA. EXPECT SHOWER AND THUNDERSTORM ACTIVITY TO INCREASE DURING THE DAY AND CONTINUE INTO THE EVENING. LOCALLY HEAVY RAIN IS POSSIBLE WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... OUR MONSOONAL SURGE WILL BEGIN TO WANE BY MIDWEEK AS A DRIER SOUTHWESTERLY FLOW ALOFT BECOMES ESTABLISHED. THIS PATTERN IS EXPECTED TO CONTINUE INTO EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Local storm report, Jul 19, 1:51 PM MDT, 3 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
151 PM MDT TUE JUL 19 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0149 PM FLASH FLOOD CANYONLANDS NP 38.40N 109.88W
07/19/2011 SAN JUAN UT PARK/FOREST SRVC
FLASH FLOODING OCCURRING WITH WATER FLOWING THROUGH
DAVIS AND LAVENDER CANYON IN THE NEEDLES DISTRICT. THESE
CANYONS DRAIN INTO INDIAN CREEK.
&&
EVENT NUMBER GJT1100510
MALEKSASpecial weather statement, Jul 19, 3:13 PM MDT, 2 hours 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND JUNCTION CO 313 PM MDT TUE JUL 19 2011 COZ001>003-192200- CENTRAL YAMPA RIVER BASIN CO-LOWER YAMPA RIVER BASIN CO-ROAN AND TAVAPUTS PLATEAUS CO- 313 PM MDT TUE JUL 19 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL RIO BLANCO AND EXTREME SOUTHERN MOFFAT COUNTIES UNTIL 400 PM MDT... AT 311 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES SOUTHEAST OF RANGELY...OR 53 MILES SOUTHEAST OF NAPLES...MOVING NORTHEAST AT 20 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. LAT...LON 4027 10845 4001 10824 3989 10870 4011 10880
Local storm report, Jul 19, 5:03 PM MDT, 41 minutes before
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</html>The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 6:03 PM MDT | Flash Flood Warning | GJT | Eagle, Garfield, Pitkin | 3 hr |
| Jul 18, 6:27 PM MDT | Areal Flood Advisory | GJT | Dolores, Hinsdale, Ouray, San Juan, San Miguel | 3 hr |
| Jul 18, 7:20 PM MDT | Areal Flood Advisory | GJT | Eagle, Garfield, Rio Blanco, Routt | 3 hr |
| Jul 18, 8:30 PM MDT | Severe Thunderstorm Warning | GJT | Montezuma | 45 min |
| Jul 18, 8:34 PM MDT | Tornado Warning | GJT | Montezuma | 11 min |
| Jul 18, 8:43 PM MDT | Tornado Warning | GJT | Montezuma | 17 min |
| Jul 18, 9:12 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 48 min |
| Jul 18, 9:58 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 47 min |
| Jul 18, 10:46 PM MDT | Special Weather Statement | GJT | Moffat | 44 min |
| Jul 19, 2:24 PM MDT | Areal Flood Advisory | GJT | Garfield, Mesa, Pitkin | 2 hr |
| Jul 19, 3:02 PM MDT | Areal Flood Advisory | GJT | Montrose, Ouray, San Miguel | 3 hr |
| Jul 19, 3:13 PM MDT | Special Weather Statement | GJT | Rio Blanco | 47 min |
| Jul 19, 3:20 PM MDT | Areal Flood Advisory | GJT | Delta, Montrose, Ouray | 3 hr |
| Jul 19, 3:38 PM MDT | Areal Flood Advisory | GJT | Mesa, Montrose | 3 hr |
| Jul 19, 4:45 PM MDT | Flash Flood Warning | GJT | Dolores, Ouray, San Juan, San Miguel | 3 hr |
| Jul 19, 4:48 PM MDT | Areal Flood Advisory | GJT | Delta, Eagle, Garfield, Gunnison, Mesa, Moffat and 3 more | 4 hr |
| Jul 19, 4:51 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 35 min |
| Jul 19, 5:03 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Routt | 42 min |
| Jul 18, 7:42 PM MDT | Special Weather Statement | GJT | Grand | 48 min |
| Jul 18, 11:54 PM MDT | Areal Flood Advisory | GJT | Uintah | 3 hr |
| Jul 19, 12:42 PM MDT | Areal Flood Advisory | GJT | San Juan | 3 hr |
| Jul 19, 1:11 PM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
| Jul 19, 2:16 PM MDT | Areal Flood Advisory | GJT | Uintah | 3 hr |
| Jul 19, 3:00 PM MDT | Severe Thunderstorm Warning | GJT | Uintah | 45 min |
| Jul 19, 3:45 PM MDT | Severe Thunderstorm Warning | GJT | Uintah | 45 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2011Every severe thunderstorm warning in 2011
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.