Alert archive / Utah / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 28, NWS Salt Lake City, UT

June 7, 2005Utah County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 7, 2005, 7:24 AM MDT for Utah County, Utah. It was in force for 37 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 7, 2005, 7:24 AM MDT (13:24 UTC)
Expired: Jun 7, 2005, 8:01 AM MDT
In force: 37 min
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), 119 km from the middle of the area, began a volume at 13:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 1.4 hours before the alert went out and 60 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: 5 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KSLC 071324
SVRSLC
UTC049-071400-
/O.NEW.KSLC.SV.W.0028.050607T1324Z-050607T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
724 AM MDT TUE JUN 7 2005

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN UTAH COUNTY IN UTAH
  THIS INCLUDES THE CITY OF PROVO

* UNTIL 800 AM MDT

* AT 712 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED 23 MILES SOUTHWEST OF LEHI...OR ABOUT 23 MILES
  WEST OF PAYSON...AND MOVING NORTHEAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  AMERICAN FORK...LEHI...LINDON AND 8 MILES NORTHWEST OF OREM BY 735
  AM MDT
  PLEASANT GROVE AND ALPINE BY 740 AM MDT

LAT...LON 4028 11215 4017 11214 4005 11212 4024 11162
      4047 11177

$$

1 follow-up statement

000 
WWUS55 KSLC 071401
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
800 AM MDT TUE JUN 7 2005

UTC049-071409-
/O.EXP.KSLC.SV.W.0028.000000T0000Z-050607T1400Z/
UTAH UT-
800 AM MDT TUE JUN 7 2005

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN UTAH COUNTY
EXPIRES AT 800 AM MDT...

THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN UTAH COUNTY EXPIRED 
AT 800 AM. THIS SEVERE THUNDERSTORM WEAKENED AS IT MOVED NORTHEAST 
ACROSS THE I-15 CORRIDOR IN THE AMERICAN FORK AREA.

LAT...LON 4028 11215 4017 11214 4005 11212 4024 11162
      4047 11177

$$

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 Jun 7, 4:50 AM MDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jun 7, 4:50 AM MDT, 2 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
450 AM MDT TUE JUN 7 2005

.SYNOPSIS...AN UPPER LEVEL WEATHER DISTURBANCE OVER EASTERN NEVADA
EARLY THIS MORNING WILL MOVE NORTHEAST ACROSS THE NORTHERN PORTION OF
UTAH TODAY. THE NEXT TROUGH WILL CROSS EXTREME NORTHERN UTAH ON
WEDNESDAY.

&&

.DISCUSSION...A SERIES OF VORTICITY MAXIMUMS CONTINUE TO ROTATE
AROUND A COMMON CENTER OVER CNTRL ID/SWRN MT.  THE NEXT VORTICITY
MAX TO AFFECT NRN UT CURRENTLY OVER E/CNTRL NV...AND LIFTING NE AT
TIME. CONVECTION HAS DEVELOPED OUT AHEAD OF THIS FEATURE OVER NW UT
ALONG AND JUST AHEAD OF THE 700 MB THERMAL BOUNDARY NEAR THE UT/NV
BORDER. EXPECTING THE VORTICITY MAX AND THE ASSOCIATED COLD FRONT
ALOFT TO RIP THROUGH NRN UT THIS MORNING/EARLY AFTERNOON.
RAINFALL AMOUNTS ARE NOT EXPECTED TO BE QUITE AS MUCH AS YESTERDAY...
WITH THE HEAVIEST AMOUNTS CONFINED TO THE FAR NORTH WHERE DYNAMICS
AND DEEP LAYER COLD ADVECTION ARE THE STRONGEST.

SUBSIDENCE SHOULD KEEP SHOWERS TO A MINIMUM THIS EVENING. THE NEXT
SHORTWAVE TO AFFECT NRN UT SCHEDULED TO ARRIVE WEDNESDAY.
CONVERGENCE ALONG THE 700MB THERMAL BOUNDARY COULD LEAD TO SOME
LIGHT SHOWERS UP NORTH LATE WEDNESDAY NIGHT...WITH THE BEST THREAT
ASSOCIATED WITH THE SHORTWAVE DURING THE DAY WEDNESDAY.  THE 06Z
NAM MODEL NOT QUITE AS STRONG OR AS FAR SOUTH AS PREVIOUS RUNS.  IF
THIS TREND HOLDS IN SUBSEQUENT MODEL RUNS...THEN THE THREAT OF
PRECIP WILL HAVE TO BE REDUCED AND PUSHED FURTHER NORTH THAN IN THE
CURRENT FORECAST.

CYCLONIC LOW-AMPLITUDE WESTERLIES ACROSS THE NRN HALF OF THE WRN
REGION LOOK TO DOMINATE THROUGH THE COMING WEEKEND.  CONFIDENCE IN
THE GFS AND ITS HANDLING OF THE DETAILS NOT ALL THAT HIGH AS OF
LATE.  FOR NOW THE BEST PATH TO FOLLOW WILL BE TO MENTION A THREAT
OF PRECIP IN THE MOUNTAINS AND FAR NORTH...BUT NOT EXPECT ANYTHING
THAT SUBSTANTIAL DURING THE EXTENDED PERIOD AS MOST OF THE ENERGY
WILL PROBABLY STAY TO OUR NORTH. TEMPS WILL REBOUND...BUT ONLY TO
READINGS CLOSE TO OR SLIGHTLY BELOW NORMAL FOR THE SECOND WEEK OF
JUNE.

&&

.HYDRO...POTENTIAL FOR SIGNIFICANT RAINFALL AGAIN TODAY OVER THE
NRN/CNTRL WASATCH FRONT.  THE HEAVIEST RAINFALLS WILL PROBABLY FALL
OVER THE NRN WASATCH FRONT AND CACHE VALLEY THROUGH EARLY THIS
AFTERNOON. AMOUNTS ARE PROBABLY MANAGEABLE...THOUGH RIVERS/STREAMS
COULD SEE SIGNIFICANT SHORT-TERM RISES THIS AFTERNOON/EVENING.

IN CENTRAL UTAH THE SEVIER RIVER REMAINS AT TO A LITTLE ABOVE FLOOD
STAGE. FLOWS SHOULD REMAIN AT OR ABOVE FLOOD STAGE FOR AT LEAST A
COUPLE MORE DAYS...THEN BEGIN TO SLOWLY DECLINE.

&&

.AVIATION...BRIEF HEAVY SHOWERS/THUNDERSTORMS POSSIBLE THIS MORNING.
MVFR CIGS/VSBY CONDITIONS POSSIBLE WITH THE HEAVIER SHOWERS/STORMS.
PREVAILING VFR CONDITIONS SHOULD RETURN NO LATER THAN MIDAFTERNOON.

&&

.FIRE...FIRE WEATHER WATCH FOR SOUTHEAST UT UPGRADED TO A RED FLAG
WARNING FOR THE PERIOD 1000-2100 MDT.  INCREASING W-SW WINDS ALONG
WITH THE LOW HUMIDITIES AND NOW CURED FINE FUELS WILL MAKE FOR
HAZARDOUS FIRE WEATHER CONDITIONS TODAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLOOD WARNING SEVIER RIVER FROM HEADWATERS TO AURORA.
WY...NONE.

CONGER

In the hours before

Local storm report, Jun 7, 5:53 AM MDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
553 AM MDT TUE JUN 07 2005

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

0540 AM     HAIL             STANSBURY PARK          40.64N 112.30W
06/07/2005  0.88 INCH        TOOELE             UT   NWS EMPLOYEE

&&

MCONGER

Local storm report, Jun 7, 6:47 AM MDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
647 AM MDT TUE JUN 07 2005

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

0640 AM     HAIL             TOOELE                  40.54N 112.30W
06/07/2005  0.75 INCH        TOOELE             UT   TRAINED SPOTTER

&&

MCONGER

Local storm report, Jun 7, 7:18 AM MDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
718 AM MDT TUE JUN 07 2005

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

0645 AM     HAIL             FARMINGTON              40.99N 111.89W
06/07/2005  0.88 INCH        DAVIS              UT   LAW ENFORCEMENT

&&

MCONGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 5:35 AM MDT	Severe Thunderstorm Warning	SLC	Davis, Salt Lake, Tooele	31 min
Jun 7, 6:23 AM MDT	Severe Thunderstorm Warning	SLC	Salt Lake, Tooele	37 min
Jun 7, 7:00 AM MDT	Severe Thunderstorm Warning	SLC	Davis, Salt Lake, Tooele	35 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.