Alert archive / Utah / Flash Flood Warnings in 2005

Flash Flood Warning 4, NWS Salt Lake City, UT

April 29, 2005Utah County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Apr 29, 2005, 12:45 AM MDT for Utah County, Utah. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 29, 2005, 12:45 AM MDT (06:45 UTC)
Expired
Apr 29, 2005, 6:00 AM MDT
In force
5 hr
Issued by
NWS Salt Lake City, UT
Area
Counties, with a storm outline in the text

County Utah County, UT

The radar

The Salt Lake City radar (KMTX), 111 km from the middle of the area, began a volume at 06:46 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

Salt Lake City I, UT (KSLC), launched 00:00Z, 6.8 hours before the alert went out and 43 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.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 00:00Z on 2005-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 00:00Z on 2005-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
10 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KSLC 290646 CCA
FFWSLC
UTC049-291200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1245 AM MDT FRI APR 29 2005

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL UTAH COUNTY IN UTAH

* UNTIL 600 AM MDT

* AT 1036 PM MDT THURSDAY...LOCAL LAW ENFORCEMENT OFFICIALS REPORT A 
  RAIN INDUCED LANDSLIDE IN THE FOOTHILLS NEAR THE CEDAR HILLS AREA  
  JUST SOUTH OF AMERICAN FORK CANYON.

* RAINFALL WILL END BY 200 AM MDT FRIDAY.

LAW ENFORCEMENT REPORTS A RAIN INDUCED LANDSLIDE IN THE FOOTHILLS 
NEAR CEDAR HILLS. 

LAW ENFORCEMENT HAS INITIATED AN EVACUATION IN THE PATH OF THE SLIDE.
DUE TO DARKNESS...THE EXTENT OF THE SLIDE IS UNCERTAIN AT THIS TIME.

LAT...LON 4039 11178 4041 11169 4044 11170 4043 11179

$$

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 10:46 PM MDTFlash Flood WarningSLCUtah104 min

Nearby

Flash Flood Warnings in Utah, 2005Every flash flood warning in 2005

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.