Alert archive / Utah / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 2, NWS Salt Lake City, UT

May 6, 2016Box Elder County, Cache County, Weber County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 6, 2016, 4:05 PM MDT for Box Elder County, Cache County, Weber County, Utah. It was in force for 25 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 6, 2016, 4:05 PM MDT (22:05 UTC)
Expired
May 6, 2016, 4:30 PM MDT
In force
25 min
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon

Counties Box Elder County, UT, Cache County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 25 km from the middle of the area, began a volume at 22:07 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 was reported inside it

TimeReportWhereRemark
May 6, 4:20 PM MDTTSTM WND GST 662 N Willard, UTI-15 AT WILLARD MESONET SITE
May 6, 4:20 PM MDTTSTM WND GST 662 N Willard, UT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 10.1 hours before the alert went out and 87 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 12:00Z on 2016-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2016-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.19395878Sfc1 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
8 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
2710 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

774 
WUUS55 KSLC 062208
SVRSLC
UTC003-005-057-062230-
/O.NEW.KSLC.SV.W.0002.160506T2205Z-160506T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
405 PM MDT FRI MAY 6 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL WEBER COUNTY IN UTAH...
  SOUTHEASTERN BOX ELDER COUNTY IN UTAH...
  WEST CENTRAL CACHE COUNTY IN UTAH...

* UNTIL 430 PM MDT

* AT 405 PM MDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 15 MILES WEST OF HOOPER TO NEAR
  MARRIOTT-SLATERVILLE...AND MOVING NORTH AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BRIGHAM CITY...PERRY... WILLARD... BEAR RIVER CITY... CORINNE...
  FARR WEST... PLAIN CITY... HONEYVILLE... ELWOOD... DEWEYVILLE...
  BEAR RIVER... SLATERVILLE... WEST WARREN...
  GOLDEN SPIKE HISTORIC SITE... WEST WEBER AND WARREN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4162 11267 4172 11200 4125 11202 4118 11250
TIME...MOT...LOC 2205Z 172DEG 31KT 4123 11242 4128 11212 

$$

MCONGER

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 11:13 AM MDTWind AdvisorySLC4 hr
May 6, 1:28 PM MDTSevere Thunderstorm WarningSLCDuchesne32 min
May 6, 1:44 PM MDTSpecial Weather StatementSLCSalt Lake31 min
May 6, 3:29 PM MDTSpecial Weather StatementSLCDavis31 min
May 6, 4:32 PM MDTSevere Thunderstorm WarningSLCBox Elder, Cache28 min
May 6, 4:59 PM MDTSevere Thunderstorm WarningSLCBox Elder31 min

Nearby

Severe Thunderstorm Warnings in Utah, 2016Every severe thunderstorm warning in 2016

Sources

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