Alert archive / Utah / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 13, NWS Salt Lake City, UT

May 29, 2005Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 29, 2005, 7:38 PM MDT for Box Elder County, Utah. It was in force for 56 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: May 29, 2005, 7:38 PM MDT (01:38 UTC)
Expired: May 29, 2005, 8:34 PM MDT
In force: 56 min
Issued by: NWS Salt Lake City, UT
Area: Counties, with a storm outline in the text

County Box Elder County, UT

The radar

The Salt Lake City radar (KMTX), 84 km from the middle of the area, began a volume at 01:38 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, 1.6 hours before the alert went out and 153 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: 30 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 3454 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 46 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 
WUUS55 KSLC 300138
SVRSLC
UTC003-300230-
/O.NEW.KSLC.SV.W.0013.050530T0138Z-050530T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
738 PM MDT SUN MAY 29 2005

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTH CENTRAL BOX ELDER COUNTY IN UTAH

* UNTIL 830 PM MDT

* AT 733 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  EXTREME NORTH CENTRAL BOX ELDER COUNTY...OR ABOUT 6 MILES WEST OF
  SNOWVILLE...AND MOVING NORTHEAST AT 15 MPH.

LAT...LON 4191 11295 4187 11279 4201 11274 4208 11280

$$

AOT

2 follow-up statements

000 
WWUS55 KSLC 300202
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
800 PM MDT SUN MAY 29 2005

UTC003-300230-
/O.CON.KSLC.SV.W.0013.000000T0000Z-050530T0230Z/
BOX ELDER UT-
800 PM MDT SUN MAY 29 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 830 PM MDT FOR
EXTREME NORTH CENTRAL BOX ELDER COUNTY...

AT 755 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED OVER EXTREME NORTH CENTRAL BOX ELDER COUNTY...OR ABOUT NEAR 
SNOWVILLE ALONG THE IDAHO BORDER. THIS STORM MOVING NORTH AT 15 MPH.
THIS THUNDERSTORM COMPLEX PRODUCED A TORNADO ACROSS THE BORDER IN 
IDAHO.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

LAT...LON 4191 11295 4187 11279 4201 11274 4208 11280

$$

AOT

000 
WWUS55 KSLC 300234
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
833 PM MDT SUN MAY 29 2005

UTC003-300243-
/O.EXP.KSLC.SV.W.0013.000000T0000Z-050530T0230Z/
BOX ELDER UT-
833 PM MDT SUN MAY 29 2005

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTH CENTRAL BOX
ELDER COUNTY EXPIRED AT 830 PM MDT...

SEVERE THUNDERSTORMS THAT TRACKED NEAR SNOWVILLE HAVE MOVED INTO 
IDAHO. HOWEVER ADDITIONAL SEVERE THUNDERSTORMS ARE POSSIBLE THIS 
EVENING. A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR A STORM 
IN FAR NORTHWEST UTAH ALONG ROUTE 30.

LAT...LON 4191 11295 4187 11279 4201 11274 4208 11280

$$

AOT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 7:42 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	48 min
May 29, 8:31 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	45 min
May 29, 9:50 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	40 min
May 30, 5:04 AM MDT	Severe Thunderstorm Warning	SLC	Tooele	26 min
May 30, 5:26 AM MDT	Severe Thunderstorm Warning	SLC	Tooele	34 min
May 30, 6:00 AM MDT	Severe Thunderstorm Warning	SLC	Tooele, Utah	30 min
May 30, 7:04 AM MDT	Severe Thunderstorm Warning	SLC	Salt Lake, Utah	26 min
May 30, 7:24 AM MDT	Flash Flood Warning	SLC	Tooele	96 min

Nearby

Severe Thunderstorm Warnings in Utah, 2005 Every severe thunderstorm 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.