Alert archive / Utah / Special Weather Statements in 2015

Special Weather Statement, NWS Salt Lake City, UT

June 1, 2015Cache County, Utah

NWS Salt Lake City, UT issued this special weather statement at Jun 1, 2015, 5:13 PM MDT for Cache County, Utah. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 1, 2015, 5:13 PM MDT (23:13 UTC)
Expired: Jun 1, 2015, 6:00 PM MDT
In force: 47 min
Issued by: NWS Salt Lake City, UT

County Cache County, UT

The radar

The Salt Lake City radar (KMTX), 63 km from the middle of the area, began a volume at 23:16 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 12:00Z, 11.2 hours before the alert went out and 92 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 11 J/kg
Mixed-layer CIN: -321 J/kg
Mixed-layer LCL: 3463 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 197 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 1, 3:23 PM MDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jun 1, 3:23 PM MDT, 1 hour 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
323 PM MDT MON JUN 1 2015

.SYNOPSIS...A WARM SOUTHWEST FLOW WILL REMAIN OVER THE AREA TODAY.
A WEAK COLD FRONT WILL CROSS NORTHERN UTAH TONIGHT. ANOTHER WEAK
PACIFIC STORM SYSTEM WILL CLIP NORTHERN UTAH MIDWEEK.

&&

.DISCUSSION...AREA OF SHOWERS AND THUNDERSTORMS OVER NORTHWEST
UTAH THIS AFTERNOON AS EXPECTED. MUCH OF THE SEVERE ACTIVITY IS
NORTH OF THE AREA IN SOUTHERN IDAHO. STILL MAY SEE AN ISOLATED
THUNDERSTORM BUT DO NOT EXPECT ANYTHING WIDESPREAD. ANOTHER AREA
OF SHOWERS AND ISOLATED THUNDERSTORMS AHEAD OF THE FRONT MAINLY
OVER THE UINTA MOUNTAINS. EXPECT THE PROGRESSION OF THE FRONT
ACROSS NORTHERN UTAH WITH STORMS DEVELOPING BEHIND IT. AREA
REMAINS UNDER SOUTHWEST FLOW TUESDAY BUT WITH LESS FORCING DO NOT
EXPECT MUCH ACTIVITY OUTSIDE OF AN ISOLATED CHANCE OVER THE
MOUNTAINS OF NORTHERN UTAH. TEMPERATURES WILL ALSO BE COOLER ON
TUESDAY BEHIND THE FRONT. WEDNESDAY WILL BE A BIT MORE ACTIVE
ACROSS THE NORTHERN PORTIONS WITH ANOTHER DISTURBANCE MOVING
THROUGH. THURSDAY WILL AGAIN BE IN BETWEEN SYSTEMS WILL LITTLE TO
NOT THUNDERSTORM ACTIVITY EXPECTED.

THE BIGGEST QUESTION IN THE FORECAST STARTS FRIDAY AND CONTINUES
THROUGH THE WEEKEND. A LOW PRESSURE SYSTEM WILL DROP SOUTH ALONG
THE CALIFORNIA COAST AND MOVES VERY LITTLE THROUGH THE WEEKEND.
THE GFS TAPS INTO SOME TROPICAL MOISTURE AND BRINGS A FAIRLY WET
WEEKEND TO MUCH OF THE STATE. THE ECMWF HOWEVER IS NOT NEARLY
AGGRESSIVE AS IT DOES NOT TAP MUCH MOISTURE AT ALL. THE GFS ALSO
GRABS HOLD OF ANOTHER TROPICAL SYSTEM EARLY NEXT WEEKEND AND COULD
BRING SOME HEAVY RAIN TO SOUTHERN UTAH. THERE IS DEFINITELY A LOT
OF UNCERTAINTY WITH THIS RIGHT NOW BUT IT BEARS WATCHING IF WE CAN
GET SOME TROPICAL MOISTURE INTO THE STATE.

&&

.AVIATION...A COLD FRONT IS EXPECTED TO SWITCH WINDS AT THE SLC
TERMINAL TO THE WEST-NORTHWEST TODAY...WITH A MOST LIKELY TIMING OF
00Z TO 02Z. THERE IS A 20 PERCENT CHANCE OF A SHOWER OR THUNDERSTORM
IMPACTING THE TERMINAL AFTER 22Z...BUT THE BEST STORMS WILL LIKELY
REMAIN WELL NORTH AND WEST OF THE AREA. AFTER THE COLD FRONTAL
PASSAGE...SOUTHERLIES ARE EXPECTED TO RETURN AROUND 04-06Z...BUT
THERE IS A SLIGHT CHANCE THAT SOUTHERLIES RETURN AS EARLY AS 03Z.

&&

.FIRE WEATHER...GUSTY SOUTHERLY WINDS HAVE BEEN OBSERVED OVER MUCH
OF THE DISTRICT TODAY AHEAD OF THE COLD FRONT THAT WILL MOVE THROUGH
NORTHERN UTAH THIS EVENING. BEHIND THE FRONT...NORTHERN UTAH
TEMPERATURES WILL COOL TO NEAR SEASONAL NORMALS WITH SOME MOISTURE
MOVING IN WHILE CENTRAL AND SOUTHERLY UTAH WILL REMAIN UNSEASONABLY
WARM AND QUITE DRY. WINDS WILL REMAIN GUSTY INTO TUESDAY ACROSS MUCH
OF UTAH BEFORE BECOMING LIGHTER WEDNESDAY. A STORM SYSTEM DROPPING
INTO CALIFORNIA ON THURSDAY WILL BRING MOISTURE BACK INTO THE
DISTRICT FRIDAY THROUGH THE WEEKEND.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

PUBLIC...SOLUM
AVIATION...SCHOENING
FIRE WEATHER...TRAPHAGAN

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

In the hours before

Local storm report, Jun 1, 4:53 PM MDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
453 PM MDT MON JUN 01 2015

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

0230 PM     TSTM WND GST     8 E WENDOVER            40.74N 113.87W
06/01/2015  M60.00 MPH       TOOELE             UT   MESONET

            SLDURO MESONET SITE

0300 PM     TSTM WND GST     25 NE IBAPAH            40.29N 113.64W
06/01/2015  M66.00 MPH       TOOELE             UT   MESONET

            WEST SALT FLATS

0355 PM     TSTM WND GST     30 E WENDOVER           40.74N 113.45W
06/01/2015  M66.00 MPH       TOOELE             UT   MESONET

            DUGWAY-INTERSTATE 80

0430 PM     TSTM WND GST     7 E HOWELL              41.77N 112.31W
06/01/2015  M62.00 MPH       BOX ELDER          UT   MESONET

            I-84 AT WHITES VALLEY

&&

LC

Special weather statement, Jun 1, 5:13 PM MDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
513 PM MDT MON JUN 1 2015

UTZ001-002-006-007-020000-
WASATCH MOUNTAIN VALLEYS UT-NORTHERN WASATCH FRONT UT-
WASATCH MOUNTAINS I-80 NORTH UT-CACHE VALLEY/UTAH PORTION UT-
513 PM MDT MON JUN 1 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BOX ELDER...CACHE
AND NORTHEASTERN WEBER COUNTIES UNTIL 600 PM MDT...

AT 513 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER PETER...OR 8 MILES WEST OF LOGAN...MOVING
EAST AT 15 MPH.

WINDS OF 40 TO 55 MPH WILL BE POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
LOGAN...BRIGHAM CITY...TREMONTON...CACHE...NORTH OGDEN...
SMITHFIELD...HYRUM...PERRY...WELLSVILLE...WILLARD...LEWISTON...BEAR
RIVER CITY...MANTUA...CORINNE...CLARKSTON...TRENTON...PLYMOUTH...
BENSON...SOUTH WILLARD AND RIVERSIDE.

STRONG WINDS WITH THESE SHOWERS MAY OCCUR WELL AHEAD OF ANY RAIN. DO
NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER. SEEK SHELTER
IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

LAT...LON 4134 11165 4133 11220 4200 11213 4200 11160
TIME...MOT...LOC 2313Z 285DEG 14KT 4176 11198

ES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 5:35 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	40 min

Nearby

Special Weather Statements in Utah, 2015 Every special weather statement in 2015

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.