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McGee Mountain south of Mammoth Lakes Great Reno Balloon Races Wave Cloud over Reno Lake Tahoe - Emerald Bay
Soaring ForecastPrintable version of latest Soaring Forecast Slide MountainPrintable version of latest Slide Mountain Data Soaring Terms & Indices
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Current Version Previous Version: 12345
UXUS97 KREV 031447
SRGREV

SOARING FORECAST
NATIONAL WEATHER SERVICE - RENO NV
700 AM PDT SUN APR 3 2005

THIS SOARING FORECAST IS FOR THE EASTERN SIERRA AND WESTERN NEVADA
WITH SPECIFIC INDICES FOR THE GREATER RENO AREA.

THIS FORECAST IS NOT UPDATED.

FOR CURRENT FLIGHT CONDITIONS...FORECASTS...AND ADVISORIES...ACCESS
YOUR LOCAL BRIEFING OUTLET OR FLIGHT SERVICE STATION.

*******************************************************************
LOCAL INDICES FOR RENO: TODAY YESTERDAY
MAXIMUM TEMPERATURE AT RENO...(DEG F)... 58 67
TRIGGER TEMPERATURE...........(DEG F)... 46 54
EXCEEDED YESTERDAY BY 18Z
MAXIMUM ALTITUDE..............(FT MSL).. 13800 15100
SOARING INDEX.................(FPM)..... 744 843
FORECASTED K-INDEX.........VALID 18Z.... 21 5
FORECASTED K-INDEX.........VALID 00Z.... 23 17
FORECASTED LIFTED INDEX....VALID 18Z.... 10 6
FORECASTED LIFTED INDEX....VALID 00Z.... 4 4

AFTERNOON WINDS ALOFT FORECAST
MSL (FT) WIND/TEMP
9000 2334/-07
10000 2336/-08
12000 2440/-12
14000 2342/-16
16000 2345/-20
18000 2352/-24
24000 2565/-35
30000 2495/-47
34000 2491/-53
39000 2475/-54

SLIDE MOUNTAIN DATA:
SLD HR 1430 M 18/13/MM52G65/M /SLIDE MTN UNOFFICIAL OBSERVATION

RENO TAF FORECAST:
KRNO 031120Z 031212 20018G25KT P6SM SCT070 BKN120
FM1900 20023G35KT P6SM SCT060 OVC100
FM0100 22018G28KT P6SM -RA BKN040 OVC060
FM0600 26014KT P6SM -RA OVC040

SYNOPSIS:
RNO SYNS 031402 STG UPR LVL TROF OFF WEST CST WITH ASSOCD CDFNT
MOVS ONSHORE BY 20Z. AMS MOIST AND BECMG UNSTBLE. MDT-STG SW-W
FLOW ALF WITH SWLY GUSTS OVR 100MPH OVR SIERRA. BREEZY SFC WND
ERN CA-WRN NV.

402 TWEB 031402 KRNO-KBIH. ALL HGTS MSL EXC CIGS. P6SM BKN120
BKN-OVC150-200 HYR MT TOPS OBSC...23Z P6SM -RASN CIGS BKN040
AREAS BLO 3SM -SN CIGS BLO OVC015 MT TOPS OBSC.

OUTLOOK FOR THE RENO-CARSON CITY-MINDEN AREA:
.MONDAY...PARTLY CLOUDY IN THE MORNING THEN CLEARING. ISOLATED
SNOW SHOWERS IN THE MORNING. SNOW LEVEL RISING TO 5500 FEET.
HIGHS 48 TO 58. WEST WINDS AROUND 10 MPH.


THIS PRODUCT IS ROUTINELY PREPARED BY 700 AM AND IS
DISTRIBUTED TO THE RENO FLIGHT SERVICE STATION AS WELL AS THE
NATIONAL WEATHER SERVICE WORLD WIDE WEB HOMEPAGE AT:
HTTP://WWW.WEATHER.GOV/RENO





Soaring ForecastPrintable version of latest Soaring Forecast Slide MountainPrintable version of latest Slide Mountain Data Soaring Terms & Indices
Reno Sounding
Latest Reno Winds Aloft
Oakland Sounding FAA Contractions
Mon Apr  4 01:07:36 2005

Slide Mountain 10 minute average data
 
 MM/DD    Time  |  Temp    Dwpt  |  RH  |      Wind (mph)
           PST  |   (F)     (F)  |      |  Dir    Speed   Gust 
_______|________|________|_______|______|_______|_______|______
  4 4     0000      15      14      94       0      31     37
  4 3     2350      15      14      94       0      35     43
  4 3     2340      15      14      95       0      33     42
  4 3     2330      15      14      95       0      34     44
  4 3     2320      16      15      95       0      30     42
  4 3     2310      16      15      95       0      30     39
  4 3     2300      16      14      95       0      29     35
  4 3     2250      16      15      95       0      30     36
  4 3     2240      16      15      95       0      33     46
  4 3     2230      16      14      95       0      35     44
  4 3     2220      16      14      95       0      36     44
  4 3     2210      16      15      95       0      33     40
  4 3     2200      16      15      95       0      33     41
  4 3     2150      16      15      95       0      34     41
  4 3     2140      16      15      95       0      35     41
  4 3     2130      17      16      95       0      33     41
  4 3     2120      17      16      95       0      31     36
  4 3     2110      17      16      95       0      32     39
  4 3     2100      17      15      95       0      34     43
  4 3     2050      16      15      95       0      37     46
  4 3     2040      15      14      95       0      38     47
  4 3     2030      15      14      95       0      44     56
  4 3     2020      15      14      95       0      47     60
  4 3     2010      15      13      94       0      50     62
  4 3     2000      15      13      94       0      52     67
  4 3     1950      14      13      94       0      52     65
  4 3     1940      15      13      94       0      54     66
  4 3     1930      15      14      95       0      54     67
  4 3     1920      15      14      95       0      51     63
  4 3     1910      15      14      95       0      49     62
  4 3     1900      15      14      95       0      46     61
  4 3     1850      16      15      95       0      47     63
  4 3     1840      16      15      95       0      43     55
  4 3     1830      16      15      95       0      44     56
  4 3     1820      17      15      95       0      48     59
  4 3     1810      17      16      95       0      47     66
  4 3     1800      17      16      95       0      43     53
  4 3     1750      17      16      95       0      45     58
  4 3     1740      17      16      95       0      42     52
  4 3     1730      17      16      95       0      45     59
  4 3     1720      17      16      95       0      44     55
  4 3     1710      17      16      95       0      46     56
  4 3     1700      17      16      95       0      45     55
  4 3     1650      17      16      95       0      48     61
  4 3     1640      18      17      95       0      46     57
  4 3     1630      17      16      95       0      46     54
  4 3     1620      17      16      95       0      45     57
  4 3     1610      18      17      95       0      45     59
  4 3     1600      18      17      95       0      42     53
  4 3     1550      18      16      95       0      43     54
  4 3     1540      18      17      95       0      43     54
  4 3     1530      18      17      95       0      43     57
  4 3     1520      18      17      95       0      49     60
  4 3     1510      18      17      94       0      50     62
  4 3     1500      18      17      94       0      49     62
  4 3     1450      18      17      94       0      49     61
  4 3     1440      19      17      94       0      49     60
  4 3     1430      19      17      94       0      50     66
  4 3     1420      19      17      94       0      51     64
  4 3     1410      19      17      95       0      47     61
  4 3     1400      19      17      94       0      48     67
  4 3     1350      19      17      95       0      42     55
  4 3     1340      18      17      94       0      47     61
  4 3     1330      18      17      95       0      45     59
  4 3     1320      18      17      94       0      48     68
  4 3     1310      19      17      94       0      48     62
  4 3     1300      18      17      94       0      49     70
  4 3     1250      18      17      94       0      48     60
  4 3     1240      18      17      94       0      53     72
  4 3     1230      18      17      94       0      55     70
  4 3     1220      18      17      94       0      57     75
  4 3     1210      18      17      94       0      57     74
  4 3     1200      18      17      94       0      53     74
  4 3     1150      18      16      94       0      55     73
  4 3     1140      18      16      94       0      59     75





Soaring ForecastPrintable version of latest Soaring Forecast Slide MountainPrintable version of latest Slide Mountain Data Soaring Terms & Indices
Reno Sounding
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Convective Condensation Level (CCL)
- is the height to which a parcel of air, if heated sufficiently from below, will rise adiabatically until it reaches saturation or condensation. It approximates the base height of cumulus clouds which are, or would be, produced by surface heating.

Equilibrium Level (EL) - is the height in the upper troposphere where a parcel of saturated air, rising because of its positive buoyancy, encounters negative buoyancy. It is as this point where the parcel becomes colder than the surrounding air.

K-index - is a measure of thunderstorm potential based on vertical temperature lapse rate and the moisture content in the lower atmosphere (700 mb and 850 mb). Numbers greater than 25 indicate good thunderstorm potential. Numbers greater than 35 indicate flash flood potential or thunderstorms accompanied by heavy rain. K= (850mb temp-500mb temp) + 850mb dew point-700 dew point depression

Lifting Condensation Level (LCL) - is the height at which a parcel of air becomes saturated when lifted dry-adiabatically. The LCL for a surface parcel is always at or below the CCL.

Level of Free Convection (LFC) - is the height at which a parcel of air lifted dry-adiabatically until saturated (LCL) and moist adiabatically thereafter would first become warmer (less dense) than the surrounding air. At this point the buoyancy of the parcel would become positive and the parcel would accelerate upward without further need for forced lift.

Lifted Index (LI) - determined using the temperature and dew point in the lowest 100 mb from an averaged mixing ratio. The parcel is lifted dry-adiabatically to the LCL, then moist adiabatically to 500 mb. The algebraic difference (Deg C) between the parcel temperature and the actual sounding temperature at 500 mb is the index value. Positive values imply greater stability. Values less than zero imply instability or positive buoyancy.

Maximum Altitude - Altitude determined from forecast high surface temperature expected for the day, when raised up the dry-adiabatic lapse rate curve to where it intercepts the actual sounding temperature plot. Note: The max altitude reported here is limited to 18,000 feet by FAA regulations.

Showalter Index (SI) - determined by lifting a parcel of air using the 850 mb temperature and dewpoint dry-adiabatically to the LCL, then moist-adiabatically to 500 mb. The algebraic difference between the parcel temperature and actual sounding temperature is the index value. Positive values imply greater stability.

Soaring Index - A forecast of maximum lift rate in feet per minute (fpm) by thermals expected at the time of maximum temperature. This empirical formula is based on maximum altitude of thermals and the lapse rate from the trigger altitude 4000 feet above the surface.

Trigger Temperature - The surface temperature reached when the temperature from the morning upper air sounding at 4000 feet above the surface is lowered dry-adiabatically to the surface.

Trigger time - The local time the trigger temperature is reached. A minimum lift rate of 260 fpm would be obtained at this time up to 4000 feet.


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