Severe Thunderstorm Warning 2, NWS Salt Lake City, UT

000 
WWUS55 KSLC 052126
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
326 PM MDT TUE MAY 5 2009

UTC005-033-052145-
/O.CON.KSLC.SV.W.0002.000000T0000Z-090505T2145Z/
RICH UT-CACHE UT-
326 PM MDT TUE MAY 5 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR NORTHERN CACHE AND NORTHWESTERN RICH COUNTIES...

AT 323 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES WEST OF
MEADOWVILLE...OR ABOUT 12 MILES WEST OF LAKETOWN...MOVING SOUTHEAST
AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES SOUTHWEST OF LAKETOWN BY 335 PM MDT...

THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

LAT...LON 4198 11126 4163 11136 4187 11191 4201 11184
      4201 11160
TIME...MOT...LOC 2126Z 310DEG 38KT 4180 11151

$$

NH

000 
WWUS55 KSLC 052146
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
346 PM MDT TUE MAY 5 2009

UTC005-033-052155-
/O.CAN.KSLC.SV.W.0002.000000T0000Z-090505T2145Z/
RICH UT-CACHE UT-
346 PM MDT TUE MAY 5 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CACHE AND
NORTHWESTERN RICH COUNTIES IS CANCELLED...

THE STORM HAS WEAKENED THEREFORE THE WARNING FOR NORTHERN CACHE AND 
NORTHWESTERN RICH COUNTIES HAS BEEN CANCELLED. 

LAT...LON 4198 11126 4163 11136 4187 11191 4201 11184
      4201 11160
TIME...MOT...LOC 2145Z 290DEG 32KT 4180 11129

$$

NH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
952 AM MDT TUE MAY 5 2009

.SYNOPSIS...A MILD WESTERLY FLOW ALOFT WILL PERSIST ACROSS THE
GREAT BASIN THE NEXT SEVERAL DAYS. A SERIES OF WEAK WEATHER
DISTURBANCES EMBEDDED IN THIS FLOW WILL CLIP FAR NORTHERN UTAH
THROUGH THE COMING WEEKEND.

&&

.DISCUSSION...SHORT WAVE TROUGH EMBEDDED IN MEAN ZONAL FLOW
PATTERN IS CURRENTLY POSITIONED OVER FAR WESTERN WASHINGTON AND
THE IDAHO PAN HANDLE PER LATEST WATER VAPOR IMAGERY. SAID TROUGH
IS POISED TO RAPIDLY MOVE WEST TO EAST ACROSS THE NORTHERN
ROCKIES THROUGH THE DAY TODAY. WEAK COLD ADVECTION AT THE LOW
LEVELS ASSOCIATED WITH THE LEADING EDGE OF THIS SHORT WAVE HAS
PUSHED THROUGH THE NORTHERN QUARTER OF THE STATE...AND AIDED IN
ENHANCING LOW LEVEL INSTABILITY EARLY THIS MORNING. THIS COUPLED
FAVORABLE UPPER JET POSITIONING AND .60 INCHES PW PER THIS
MORNINGS 12Z KSLC RAOB HAS BEEN JUST ENOUGH TO SCATTER SHOWERS
ACROSS THE NORTH. AT THIS POINT HOWEVER...MOST OF THE DYNAMICALLY
DRIVEN SHOWERS ARE DISSIPATING.

SHORT RANGE GUIDANCE AGREES ON A WEAK WARM ADVECTION TRANSITION
FOR THE AFTERNOON HOURS TODAY FROM ABOUT OGDEN SOUTH...WITH MID
LEVEL DRY AIR PUSHING IN FROM THE WEST. ANTICIPATE LOW LEVEL
INSTABILITY WILL REMAIN IN PLACE ACROSS PORTIONS OF THE CENTRAL
AND SOUTHERN WASATCH FRONT FOR A SLIGHT THREAT OF AFTERNOON
CONVECTIVELY DRIVEN SHOWER DEVELOPMENT...BUT INSTABILITY DOES NOT
APPEAR TO BE DEEP ENOUGH FOR ANY MENTION OF THUNDER OUTSIDE OF THE
NORTHERN MOUNTAINS/CACHE VALLEY AREA FOR THIS AFTERNOON WERE
SLIGHTLY DEEPER INSTABILITY SHOULD REMAIN IN PLACE. HAVE UPDATED
GRIDS DOWN THESE LINES.

ZONAL FLOW IS EXPECTED TO PERSIST THROUGH THE WEEKEND...WITH
ONLY VERY WEAK LOW LEVEL COOL PUSHES FOR THE FAR NORTH ANTICIPATED
TOMORROW AND AGAIN ON THURSDAY AS SUBTLE SYSTEMS RACE NORTH ALONG
THE CANADIAN BORDER. ANTICIPATE TEMPS ACROSS NORTHERN UTAH WILL
REMAIN AT OR SLIGHTLY BELOW NORMAL DUE TO THIS...WITH NEAR NORMAL
TEMPS ELSEWHERE ACROSS THE STATE.

MID RANGE GUIDANCE DOES AGREE THAT ZONAL FLOW WILL BUCKLE EARLY
NEXT WEEK AS A GULF OF ALASKA LOW BEGINS A GENERAL NORTHWEST TO
SOUTHEAST PROGRESSION TOWARDS THE PACIFIC NORTHWEST. THE HANDLING
OF THE PROGRESSION OF THIS SYSTEM STILL DIVERGES PAST DAY 6...SO
WILL WAIT FOR ALL THE 12Z RUNS TO ARRIVE BEFORE FOCUSING MORE ON
THE LONGER RANGE.

&&

.AVIATION...CIGS ARE EXPECTED TO SCATTER OUT SOME FOR THIS
AFTERNOON...WITH DECKS REMAINING AT OR ABOVE CREST LEVEL. THAT
SAID...A 20 PERCENT CHANCE EXISTS THAT CIGS WILL BRIEFLY LOWER
BELOW 6000FT AGL THIS AFTERNOON ACROSS THE NORTHERN APPROACHES.
SOUTHEAST WINDS ARE EXPECTED TO SWITCH TO THE NORTHWEST BETWEEN
18-20Z...AND SHOULD REMAIN IN PLACE THROUGH THE 03Z WINDOW.

&&

.FIRE WEATHER...ACROSS NORTHERN DISTRICTS A MOIST SYSTEM WILL KEEP
RH VALUES WELL ABOVE CRITICAL VALUES THIS AFTERNOON. ACROSS THE FAR
SOUTHERN DISTRICTS NEAR THE ARIZONA BORDER...RH VALUES ARE EXPECTED
TO BECOME CRITICAL THIS AFTERNOON WITH SPORADIC WIND GUSTS REACHING
CRITICAL LEVELS. HOWEVER...FUELS WERE REPORTED TO NOT BE CRITICAL AT
THIS TIME.

LOOKING AHEAD TO TOMORROW...SIMILAR CONDITIONS ARE EXPECTED ACROSS
THE SOUTHERN DISTRICTS...WITH A DRYING TREND ACROSS CENTRAL AND MANY
NORTHERN UTAH SITES AS THE NEXT MOIST SYSTEM AFFECTS THE IDAHO
BORDER REGION AND NORTHWARD.

&&

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

&&

PUBLIC/AVIATION...MERRILL
FIRE WEATHER...ROGOWSKI

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