Alert archive / Utah / Flash Flood Warnings in 2014

Flash Flood Warning 18, NWS Grand Junction, CO

September 8, 2014Grand County, Utah

NWS Grand Junction, CO issued this flash flood warning at Sep 8, 2014, 8:49 PM MDT for Grand County, Utah. It was in force for 6 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 8, 2014, 8:49 PM MDT (02:49 UTC)
Expired: Sep 9, 2014, 2:45 AM MDT
In force: 6 hr
Issued by: NWS Grand Junction, CO
Area: Storm-based polygon
Flood severity: None

County Grand County, UT

The radar

The Grand Junction radar (KGJX), 118 km from the middle of the area, began a volume at 02:51 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.

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 8, 6:55 PM MDT, 1 hour 54 minutes earlier.

Area forecast discussion, Sep 8, 6:55 PM MDT, 1 hour 54 minutes before

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Hazardous weather outlook, Sep 8, 6:56 AM MDT, 13 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
656 AM MDT MON SEP 8 2014

COZ001>014-017>023-UTZ022>025-027>029-091300-
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-
656 AM MDT MON SEP 8 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN
COLORADO.

.DAY ONE...TODAY AND TONIGHT

FLASH FLOOD WATCH HAS BEEN ISSUED FOR MUCH OF EASTERN UTAH AND
WESTERN COLORADO TODAY AND TONIGHT.  SCATTERED SHOWERS AND
THUNDERSTORMS THIS MORNING BECOME NUMEROUS BY THIS AFTERNOON.
LOCALLY HEAVY RAIN SHOWERS MAY OCCUR WHICH COULD CAUSE LOCALIZED
FLASH FLOODING OR MUD DEBRIS FLOWS. AREAS OF STEEP TERRAIN WILL BE
PRONE TO MUD OR ROCK SLIDES AND FALLING ROCKS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FLASH FLOOD WATCH CONTINUES FOR MUCH OF EASTERN UTAH AND
WESTERN COLORADO FOR TUESDAY AND TUESDAY EVENING. TOTAL RAINFALL
AMOUNTS COULD EXCEED ONE INCH OF RAIN WITH SOME MOUNTAIN AREAS
REACHING 2 TO 3 INCHES OF RAIN. EXCESSIVE RAIN ELEVATES THE
DANGERS OF FLASH FLOODING AND MUD DEBRIS FLOWS. RAIN WILL BE
ENDING ON WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY OR TONIGHT AND POSSIBLY
AGAIN ON TUESDAY. SPOTTERS ARE ENCOURAGED TO RELAY RAINFALL
AMOUNTS OR ANY OBSERVED FLOODING TO THE GRAND JUNCTION FORECAST
OFFICE.

The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 1:18 AM MDT	Flash Flood Warning	GJT	Ouray, San Juan, San Miguel	12 hr
Sep 9, 12:23 PM MDT	Areal Flood Advisory	GJT	Garfield	3 hr
Sep 9, 1:40 PM MDT	Areal Flood Advisory	GJT	Garfield, Mesa	3 hr
Sep 9, 2:54 PM MDT	Areal Flood Advisory	GJT	Eagle, Garfield, Mesa, Rio Blanco, Routt	3 hr
Sep 9, 3:37 PM MDT	Flash Flood Warning	GJT	Garfield, Mesa	6 hr
Sep 9, 4:13 PM MDT	Special Weather Statement	GJT	Mesa	47 min
Sep 9, 4:17 PM MDT	Areal Flood Advisory	GJT	Mesa	3 hr
Sep 9, 5:05 PM MDT	Areal Flood Advisory	GJT	Delta, Garfield, Gunnison, Mesa, Pitkin	3 hr
Sep 9, 8:46 AM MDT	Areal Flood Advisory	GJT	Grand	9 hr

Nearby

Flash Flood Warnings in Utah, 2014 Every flash flood warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.