Alert archive / Utah / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 106, NWS Salt Lake City, UT

October 6, 2006Iron County, Washington County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Oct 6, 2006, 12:48 PM MDT for Iron County, Washington County, Utah. It was in force for 42 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, 2006, 12:48 PM MDT (18:48 UTC)
Expired
Oct 6, 2006, 1:30 PM MDT
In force
42 min
Issued by
NWS Salt Lake City, UT
Area
Counties, with a storm outline in the text

Counties Iron County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 47 km from the middle of the area, began a volume at 18:50 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.

IssuedProductOfficeLasted
Oct 6, 12:10 PM MDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 6.8 hours before the alert went out and 254 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, Mercury/Desert R, NV at 12:00Z on 2006-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 2006-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2181 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Salt Lake City, UT wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 6, 12:30 PM MDT, 18 minutes earlier.

Area forecast discussion, Oct 6, 12:30 PM MDT, 18 minutes before
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Hazardous weather outlook, Oct 6, 7:00 AM MDT, 5 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
700 AM MDT FRI OCT 6 2006

UTZ010>021-071300-
CASTLE COUNTRY-CENTRAL AND SOUTHWEST MOUNTAINS-GLEN CANYON RECREATION
AREA/LAKE POWELL-HENRY MOUNTAINS-SAN RAFAEL SWELL-SANPETE/SEVIER
VALLEYS-SOUTH CENTRAL UTAH-SOUTHWEST UTAH-UTAHS DIXIE AND ZION
NATIONAL PARK-WASATCH PLATEAU/BOOK CLIFFS-WEST CENTRAL UTAH-WESTERN
UINTA BASIN-
700 AM MDT FRI OCT 6 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHERN TWO-THIRDS OF
UTAH.

.DAY ONE...TODAY AND TONIGHT

A VERY MOIST AND UNSTABLE AIRMASS OVER UTAH WILL FUEL NUMEROUS
SHOWERS AND THUNDERSTORMS TODAY...AND ON INTO THIS EVENING. A LOW
PRESSURE SYSTEM MOVING NORTHEAST INTO SOUTHERN UTAH LATER THIS
AFTERNOON WILL PRODUCE STRONG THUNDERSTORMS...WITH HEAVY RAIN AND
HAIL...DURING THE LATE AFTERNOON AND EVENING HOURS. THE EXPECTED
HEAVY RAINFALL COULD CREATE FLASH FLOODING...ESPECIALLY IN SLOT
CANYONS OR IN AREAS THAT HAVE ALREADY RECEIVED HEAVY RAIN SINCE
YESTERDAY. A FLASH FLOOD WATCH IS IN EFFECT FOR MUCH OF SOUTHERN AND
EASTERN UTAH THROUGH 900 PM MDT THIS EVENING. CHECK THE LATEST
SLCFFASLC FOR DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SATURDAY WILL SEE DRIER CONDITIONS SPREAD ACROSS SOUTHERN UTAH. THE
THREAT OF SHOWERS AND THUNDERSTORMS WILL RETURN SUNDAY...AND
CONTINUE INTO THE MIDDLE OF NEXT WEEK. HIGH PRESSURE ALOFT WILL
BRING AN END TO SHOWERS AND STORMS BY THE END OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

UTZ001>009-WYZ021-071300-
CACHE VALLEY/UTAH PORTION-GREAT SALT LAKE DESERT AND MOUNTAINS-
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-
SOUTHERN WASATCH FRONT-SOUTHWEST WYOMING-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-
700 AM MDT FRI OCT 6 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN UTAH AND EXTREME
SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED ACROSS THE
AREA TODAY. HEAVY RAINS AND HAIL FROM STRONG THUNDERSTORMS ARE
EXPECTED LATER THIS EVENING AS A LOW PRESSURE SYSTEM LIFTS NORTHEAST
ACROSS NORTHERN UTAH. MINOR FLOODING COULD DEVELOP FROM THE STRONG
STORMS...ESPECIALLY IN THE URBAN AREAS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SHOWERS AND THUNDERSTORMS WILL LINGERING INTO SATURDAY...THEN END
MOST AREAS SATURDAY NIGHT OR EARLY SUNDAY. SHOWERS AND STORMS COULD
RETURN FOR THE FIRST HALF OF NEXT WEEK AS A NEW LOW PRESSURE SYSTEM
SETTLES INTO THE GREAT BASIN. HIGH PRESSURE ALOFT WILL RETURN LATE IN
THE WEEK...BRINGING AN END TO THE PRECIPITATION FOR NORTHERN UTAH
AND SOUTHWEST WYOMING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Oct 6, 9:28 AM MDT, 3 hours 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
928 AM MDT FRI OCT 06 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0825 AM     FLASH FLOOD      10 E KANAB              37.02N 112.34W
10/06/2006                   KANE               UT   LAW ENFORCEMENT

            JOHNSON CANYON WASH FLOODING...BUT NOT YET ACROSS
            ROADWAY.

0825 AM     FLASH FLOOD      HANKSVILLE              38.37N 110.72W
10/06/2006                   WAYNE              UT   LAW ENFORCEMENT

            WATER...DEBRIS AND ROCKS ACROSS HIGHWAY 24 BETWEEN
            KAINEVILLE AND HANKSVILLE...AND ACROSS HIGHWAY 95 SOUTH
            OF HANKSVILLE. ALSO...FLOW ALONG THE DIRTY DEVIL RIVER
            INCREASED FROM JUST OVER 100 CFS AROUND MIDNIGHT TO ABOVE
            10000 CFS THIS MORNING.

&&

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 5, 7:42 PM MDTSevere Thunderstorm WarningSLCKane, San Juan33 min
Oct 5, 8:09 PM MDTSevere Thunderstorm WarningSLCGarfield, Kane, San Juan12 min
Oct 6, 8:25 AM MDTFlash Flood WarningSLCGarfield, Kane, Wayne6 hr
Oct 6, 10:05 AM MDTFlash Flood WarningSLCCarbon, Emery, Piute, Sanpete, Sevier4 hr
Oct 6, 4:15 PM MDTSevere Thunderstorm WarningSLCKane30 min
Oct 6, 4:34 PM MDTSevere Thunderstorm WarningSLCGarfield41 min
Oct 6, 5:17 PM MDTSevere Thunderstorm WarningSLCGarfield43 min
Oct 6, 5:50 PM MDTSevere Thunderstorm WarningSLCIron25 min

Nearby

Severe Thunderstorm Warnings in Utah, 2006Every severe thunderstorm warning in 2006

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.