Alert archive / Utah / Flash Flood Warnings in 2013
Flash Flood Warning 36, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at Sep 9, 2013, 10:26 AM MDT for San Juan County, Utah. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 9, 2013, 10:26 AM MDT (16:26 UTC)
- Expired
- Sep 9, 2013, 1:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Flood severity
- None
County San Juan County, UT
The radar
The Grand Junction radar (KGJX), 212 km from the middle of the area, began a volume at 16:27 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, 4.4 hours before the alert went out and 202 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
- 316 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Sep 9, 9:43 AM MDT, 43 minutes earlier.
Area forecast discussion, Sep 9, 9:43 AM MDT, 43 minutes before
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</html>Hazardous weather outlook, Sep 9, 4:55 AM MDT, 5 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 455 AM MDT MON SEP 9 2013 COZ001>014-017>023-UTZ022>025-027>029-101200- 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-FLATTOPS- 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- 455 AM MDT MON SEP 9 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS EASTERN UTAH AND WESTERN COLORADO THROUGH TONIGHT. HEAVY RAIN WILL BE POSSIBLE...ESPECIALLY ACROSS SOUTHEAST UTAH AND THE LOWER VALLEYS OF EXTREME SOUTHWEST COLORADO...WHERE A FLASH FLOOD WATCH WILL BE IN EFFECT THROUGH THIS EVENING. THE POTENTIAL EXISTS FOR FLASH FLOODING IN THESE AREAS...ESPECIALLY IN NARROW SLOT CANYONS...NEAR STEEP TERRAIN AND OVER BURN SCARS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY EXPECT SHOWERS AND THUNDERSTORMS THROUGHOUT THE PERIOD FAVORING HIGHER TERRAIN. A PERSISTENT INFLUX OF MONSOON MOISTURE POSES THE THREAT OF LOCALIZED RUNOFF PROBLEMS EACH DAY THROUGH MIDWEEK. SOME DRYING CAN BE EXPECTED FRIDAY...ALTHOUGH ANOTHER SURGE OF MOISTURE APPEARS POISED TO BACK THROUGH THE REGION OVER THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Local storm report, Sep 9, 5:44 AM MDT, 4 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
544 AM MDT MON SEP 09 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0521 AM HEAVY RAIN ROOSEVELT 40.30N 109.97W
09/09/2013 M0.97 INCH UINTAH UT BROADCAST MEDIA
OVERNIGHT RAINFALL
&&
EVENT NUMBER GJT1301473
DCThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 4:20 PM MDT | Areal Flood Advisory | GJT | Garfield | 3 hr |
| Sep 9, 5:03 PM MDT | Areal Flood Advisory | GJT | Mesa | 3 hr |
| Sep 9, 10:15 AM MDT | Areal Flood Advisory | GJT | Grand | 22 hr |
| Sep 9, 1:31 PM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
| Sep 9, 4:28 PM MDT | Areal Flood Warning | GJT | San Juan | 24 hr |
Nearby
Flash Flood Warnings in Utah, 2013Every flash flood warning in 2013
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.