Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 6:00AM||Sunset 8:09PM||Thursday July 29, 2021 2:30 AM PDT (09:30 UTC)||Moonrise 11:36PM||Moonset 11:41AM||Illumination 75%|
7 Day Forecast for Marine Location Near Bishop, CAHourly EDIT Help
Area Discussion for - Las Vegas, NV  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KVEF 290403 AFDVEF
Area Forecast Discussion National Weather Service Las Vegas NV 903 PM PDT Wed Jul 28 2021
SYNOPSIS. Scattered thunderstorms are expected over the southern Sierra and central Nevada. Monsoonal moisture will spread back into our region late Thursday and Friday leading to an increasing threat of thunderstorms with heavy rain through the weekend. Flash flooding and gusty winds expected.
UPDATE. Made some tweaks to the PoP forecast tonight. Some of the CAMs (Convective Allowing Models) have been insistent on developing a few shallow showers across central Clark County this evening. Not a great signal on the dynamics to support this, expect for a small area of mid-level vorticity moving through the area in the next few hours. Mesoanalysis is indicating that SBCIN may actually deteriorate this evening, which would allow for some shallow showers to develop. So, needless to say, a few sprinkles across some portions of the Las Vegas Valley is not completely out of the question, but measurable precipitation is unlikely. Otherwise, not much change to the immediate forecast this evening. Still expecting more some isolated to scattered convection tomorrow afternoon and evening, initially favoring the higher terrain. Las Vegas starts to see increased chances tomorrow evening, with even higher chances Friday through Saturday.
AVIATION. For McCarran . The latest high-res models continue to show a slight chance of a shower moving across the Vegas valley between 5-11Z. Confidence is too low for them to be included in the TAF, but their occurrence can not be ruled out. For Thursday, thunderstorms are still expected over the higher terrain during the day. Any of these storms will be capable of producing an outflow that could affect the terminal. Storm chances will then increase tomorrow evening, with periods of storms continuing Friday and Saturday.
For the rest of southern Nevada, northwest Arizona and southeast California . A slight chance of a shower continues this evening. Winds will generally be light and diurnal overnight into Thursday. Storms are then possible over the higher terrain Thursday, particularly near KBIH with storms developing over the Sierra Nevada. Any of these are capable pushing outflow winds in the direction of the terminal in the 25-30 kt range. SCT-BKN ceilings around 12 to 20 kft are expected across the region. Storm chances will then increase tomorrow evening, with periods of storms continuing Friday and Saturday.
PREV DISCUSSION. /issued at 202 PM PDT Wed Jul 28 2021/
DISCUSSION. Today through next Wednesday.
Expecting convection around the region today, once again favoring the higher terrain with PWAT values in excess of an inch across the Desert Southwest. This afternoon differs from yesterday in that storm potential is increased over the Sierra Nevada and the southeastern Great Basin due to additional dynamics. A low pressure system that was churning over the eastern Pacific weakened as it moved inland and up the coast of California. A weak associated jet streak of about 60 kts up at 250 mb has its right entrance region right over Esmeralda and northern Inyo County this afternoon, which will provide the aforementioned dynamics required for thunderstorm activity.
Radar coverage up in Esmeralda is sparse-to-none, but GOES-17 currently has a mesosector set up over the region, which will assist in warning operations should it be necessary.
DCAPE values will be in excess of 1200 J/kg across Inyo and Esmeralda counties, increasing further as the afternoon progresses. Coinciding with increasing PWAT values due to moisture transport from the south-southeast, primary concerns with any storm development will be gusty outflow winds as well as heavy rainfall potentially resulting in isolated flash flooding.
As mentioned in previous briefings, an easterly wave (inverted trough/low) will continue to push westward, bringing with it additional moisture to add to our monsoonal moisture as well as upper level dynamics. Widespread shower and thunderstorm chances will return to the Desert Southwest this weekend. Chances will increase Thursday evening, particularly over the higher terrain, the southern Great Basin, and northwestern Arizona. These will continue to be the areas of highest concern, though thunderstorm chances will spread areawide both Friday and Saturday. Chances will then diminish southwest to northeast through the day on Sunday as drier air moves into the region.
PWAT values will increase to nearly 2 inches along the Colorado River Valley this weekend. Coupled with no substantial storm motion, flash flooding remains the primary threat this weekend. PWAT values will be notable across the southern Great Basin as well, with PWATs exceeding an inch as far north as Ely. It is of note that these PWATs across eastern Nevada can expect between 200 and 300 percent of normal. Coordination will continue across the Intermountain West and Desert Southwest regarding Flash Flood Watches for the weekend over the next few shifts.
There remains good agreement among the model ensembles that drier air will continue to spread in from the west-southwest through the start of the work week. Temperatures will also climb back to near normal across the region.
SPOTTER INFORMATION STATEMENT. Spotters are encouraged to report any significant weather or impacts according to standard operating procedures.
UPDATE . Peters AVIATION . Planz DISCUSSION . Varian
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|Bishop, Bishop Airport, CA||2 mi||35 min||WNW 7||10.00 mi||Fair||73°F||49°F||43%||1015.1 hPa|
Link to 5 minute data for KBIH
Wind History from BIH (wind in knots)
|1 day ago||NE||N||NW||Calm||Calm||Calm||Calm||SE||SE|
|2 days ago||NW||SE|
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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