Weather analysis for 10 Aug 2007 with 00Z maps
For a real forecast, go to www.nws.noaa.gov.
Northern hemisphere: Several stacked systems in place. 500mb features have remained nearly stationary for the past 24 hours. Surface low over Maine and New Brunswick has deepened over the last 12 hours. An apparent omega blocking pattern has been in place over northern Europe for the last 72 hours. Broad ridge covers most of the US with the axis right down the middle of the country.
Southern hemisphere: Very tight pressure gradients. 2 stacked systems, one of which has a 945mb surface low. This is a rotten time to be near the Antarctic coasts.
North America: Baroclinic zone draped from MN through WI, MI, and PA. Generally weak winds at 850mb and at much of 500mb. The high pressure system over the southeast US has retrograded slightly since yesterday. A shortwave trough may be about to come onshore judging from the winds in Western Canada-- the RUC brings it onshore by 12Z on Friday. Conveyor belt stretches from the Pacific across the US and out to the Atlantic. The vorticity maximum that was just off the CA coast at 12Z on the 8th moved inland and contributed to cloudiness (possibly showers) in ID and MT.
Notes from forecast discussions:
From Great Falls, MT: SOUTHWEST FLOW ALOFT CONTINUES AS AN UPPER LEVEL TROF APPROACHES THE PACIFIC NORTHWEST. A WEAK SHORT WAVE WILL MOVE OVER THE AREA TONIGHT.
From Seattle, WA: SHORT TERM...A SHORT WAVE TROUGH IS BEGINNING TO PUSH INTO WRN WA THIS AFTERNOON WITH INCREASING ALTOCU CLOUDS OVER THE AREA. IR IMAGERY SHOWS THE MAIN CIRCULATION CENTER OFF VANCOUVER ISLAND WHICH IS EXPECTED TO PUSH ACROSS THE AREA THIS EVENING.
Northern hemisphere: Several stacked systems in place. 500mb features have remained nearly stationary for the past 24 hours. Surface low over Maine and New Brunswick has deepened over the last 12 hours. An apparent omega blocking pattern has been in place over northern Europe for the last 72 hours. Broad ridge covers most of the US with the axis right down the middle of the country.
Southern hemisphere: Very tight pressure gradients. 2 stacked systems, one of which has a 945mb surface low. This is a rotten time to be near the Antarctic coasts.
North America: Baroclinic zone draped from MN through WI, MI, and PA. Generally weak winds at 850mb and at much of 500mb. The high pressure system over the southeast US has retrograded slightly since yesterday. A shortwave trough may be about to come onshore judging from the winds in Western Canada-- the RUC brings it onshore by 12Z on Friday. Conveyor belt stretches from the Pacific across the US and out to the Atlantic. The vorticity maximum that was just off the CA coast at 12Z on the 8th moved inland and contributed to cloudiness (possibly showers) in ID and MT.
Notes from forecast discussions:
From Great Falls, MT: SOUTHWEST FLOW ALOFT CONTINUES AS AN UPPER LEVEL TROF APPROACHES THE PACIFIC NORTHWEST. A WEAK SHORT WAVE WILL MOVE OVER THE AREA TONIGHT.
From Seattle, WA: SHORT TERM...A SHORT WAVE TROUGH IS BEGINNING TO PUSH INTO WRN WA THIS AFTERNOON WITH INCREASING ALTOCU CLOUDS OVER THE AREA. IR IMAGERY SHOWS THE MAIN CIRCULATION CENTER OFF VANCOUVER ISLAND WHICH IS EXPECTED TO PUSH ACROSS THE AREA THIS EVENING.