The next two days around our region looks good. After that a nice size rain system will move in. There might be a little bit of flooding around depending on how much snowfall is left on the ground north and in the mountains to the south.
Today - Cloudy with a chance of a shower or snow shower, High 38.
Tonight - Mostly Cloudy, Low 25.
Tomorrow - Partly cloudy, High 41.
Tomorrow Night - Becoming mostly cloudy, increasing chances of rain and snow showers after midnight, Low 33.
Thursday - Rain, heavy at times, Cloudy, High 52.
Thursday Night - Showers likely, Cloudy, Low 46.
Friday - Cloudy with a chance of showers, High 46.
Friday Night - Cloudy, a chance of snow showers or rain showers, Low 24.
Saturday - Cloudy, High 34.
Saturday Night - Cloudy, a chance of snow showers, Low 21.
Tuesday, February 27, 2007
Monday, February 26, 2007
Five day 2/26 - 3/2
Ok everybody so the storm that all the meteorologist and weather people around Pittsburgh and for that matter around the nation thought was going to blow up around the Pittsburgh area did not. Very lucky for us here in da burg. Not so lucky were the people down to the south. In the little town of Dumas, Arkansas
Source: http://www.city-data.com/
people are lucky to be alive. An estimated F-2 tornado packing winds between 158 - 207 mph with a half of a mile wide path of destruction, only 27 people were injured and no one lost their life. In total 18 confirmed tornadoes touchdowns on Saturday.
But anyhow here is how we are looking here in the Pittsburgh area for the next few days.
Today - Cloudy, with a chance of a snow flurries or rain shower. High 38.
Tonight - Cloudy, with a chance of flurries. Low 27.
Tuesday - Cloudy, with a chance of snow shower or rain shower. High 37.
Tuesday Night - Decreasing cloudiness, flurries likely North and East of the City. Low 24.
Wednesday - Partly Sunny. North of I-80 a chance of flurries and Showers. High 40.
Wednesday Night - Partly Cloudy. Low 27.
Thursday - Increasing cloudiness, a chance of showers. High 52
Thursday Night - Rain developing, could be heavy at times, Cloudy. Low 37.
Friday- Showers likely. High 45.
Friday Night - Rain and snow mix. Low 31.
Saturday, February 24, 2007
Sunday's Dangerous weather
Overnight tonight and early tomorrow morning the Pittsburgh area will see a mix of Freezing rain, Sleet and snow. The Storm system is very powerful and will be producing a significant amount of frozen precipitation by tomorrow afternoon. Unlike the storm that we had two weeks ago this one will mostly be an ice event. Most places south of the city of Pittsburgh will see a change over from freezing rain to all rain then during the evening hours change back to a mix. North and east of the city, will see many hours of ice accumulation, this area will most likely not see a change over to all rain if it does it will be short lived.
So what is happening right now?
Over the Midwest a blizzard is occurring and down to the south severe weather that is producing tornadoes. The storms prediction center, (the national weather agency that is in charge of issuing the severe weather warnings and watches) has issued one of the most important advisory that they can issue. A PDS, which is a Particularly Dangerous Situation watch box. http://www.spc.noaa.gov/products/watch/ww0030.html
Now this means that severe weather is very likely and could pop up anywhere in that watch box because the atmosphere is so unstable.
The other area that is being affected by severe weather is the Midwest where numerous blizzard warning are in effect. A blizzard is defined by the national weather service as a storm with 20 degrees or lower temps. Sustained winds over 35mph, gust higher then that, and four inches of snow or higher over 12 hours forecasted.
So what is happening right now?
Over the Midwest a blizzard is occurring and down to the south severe weather that is producing tornadoes. The storms prediction center, (the national weather agency that is in charge of issuing the severe weather warnings and watches) has issued one of the most important advisory that they can issue. A PDS, which is a Particularly Dangerous Situation watch box. http://www.spc.noaa.gov/products/watch/ww0030.html
Now this means that severe weather is very likely and could pop up anywhere in that watch box because the atmosphere is so unstable.
The other area that is being affected by severe weather is the Midwest where numerous blizzard warning are in effect. A blizzard is defined by the national weather service as a storm with 20 degrees or lower temps. Sustained winds over 35mph, gust higher then that, and four inches of snow or higher over 12 hours forecasted.
Source: Weather.com
The whole area of severe weather will move to the east tomorrow and the storm will intensity rapidly overnight tonight.
The National weather service here in Pittsburgh has already issued a winter storm watch for the storm and will update it from time to time thought the day and into tomorrow. Travel around the area will be dangerous late tonight into tomorrow.
Wednesday, February 14, 2007
overnight and forecast
Overnight the sleet and freezing rain which overtook the region late yesterday afternoon after the first change from snow to sleet and freezing rain has changed back to snow. This snow will generally be light but we could pick up an addition 1 or 2 into this evening if we see a heavier band. The main story for the next few hours and days will be the extreme cold. Behind the low cold Canadien air will rush into the regions, this mixed with the winds gusts in excess of 40 mph will providing us with windchills well below zero.
Today - Snow showers, maybe another 1". Windy. Winds North 10 - 20 . High 20.
Tonight -Snow showers tapering to flurries. Winds Northwest 15 -20 gusting to 30.
Windchill vaules - 10 to -25
Tomorrow - Mostly Cloudy, windy. Winds west 10 -15 gusting to 25. High 15.
Windchill vaules - 5 to -15
Tomorrow Night - Mostly cloudy, windy. Winds west 10 - 15 gusting to 25. Low 8.
Windchill vaules - 10 to -20
Today - Snow showers, maybe another 1". Windy. Winds North 10 - 20 . High 20.
Tonight -Snow showers tapering to flurries. Winds Northwest 15 -20 gusting to 30.
Windchill vaules - 10 to -25
Tomorrow - Mostly Cloudy, windy. Winds west 10 -15 gusting to 25. High 15.
Windchill vaules - 5 to -15
Tomorrow Night - Mostly cloudy, windy. Winds west 10 - 15 gusting to 25. Low 8.
Windchill vaules - 10 to -20
Tuesday, February 13, 2007
Currently 7 pm
So a little under two weeks ago a little groundhog popped out and saw did not see his shadow. So we were supposed to have an “early spring”. Unfortunately Phil got this one wrong at least at the moment. Winter is in full force this evening across the Northeastern United State. Here in the Pittsburgh area we saw earlier a change over from snow to sleet and now to freezing rain and then will be going back to sleet then snow. The snowfall here in Allegheny County is up to about 7”. When I walked outside we have about a quarter of inch of ice on top of the snow. This could cause some really big havoc and it seems to be affecting the public transit system
here in the southern half of Allegheny County. The mayor of Pittsburgh has even asked people to stay home if possible. The city council is delayed at least an hour on Wednesday morning.
The freezing rain is primary over Allegheny County and south. Significant ice is occurring which could, very well mean, that a people around the regions could lose power because of the ice weight on the lines and trees that could fall on them.
To the north of Allegheny County heavy snowfall will happen and is already occurring.
We see that on the next forecasted surface map at 1 pm the low off the coast takes the primary role.
here in the southern half of Allegheny County. The mayor of Pittsburgh has even asked people to stay home if possible. The city council is delayed at least an hour on Wednesday morning.
The freezing rain is primary over Allegheny County and south. Significant ice is occurring which could, very well mean, that a people around the regions could lose power because of the ice weight on the lines and trees that could fall on them.
To the north of Allegheny County heavy snowfall will happen and is already occurring.
Now I have heard no discussion of this snowfall spreading southward into the Pittsburgh area as the transition from mix back to snow occurs. That could make everything very interesting.
The second half of the system will be coming over the next few hours; this second half will be when numerous things happen.
First the transition of the mixed precipitation changes back to snow, heavy at time.
Second when the Low off the eastern seaboard takes over and we begin to see wrap around precipitation. I the 1 am forecast surface map, pay attention to that low over South Carolina.
The second half of the system will be coming over the next few hours; this second half will be when numerous things happen.
First the transition of the mixed precipitation changes back to snow, heavy at time.
Second when the Low off the eastern seaboard takes over and we begin to see wrap around precipitation. I the 1 am forecast surface map, pay attention to that low over South Carolina.
We see that on the next forecasted surface map at 1 pm the low off the coast takes the primary role.
After that the winds will become a very critical player even before this transition takes place. The winds will gusting above 40 mph overnight and into Wednesday. The temperature will also drop behind the system. When we could feel windchills below zero as early as mid day Wednesday. We could still see an addition 4 - 6 inches of snowfall before tomorrow evening.
1 pm update
Here in Pittsburgh as I watched the noon news on line from wtae and on the tv kdka I noticed that they both had 2 weatherpersons this afternoon. This is interesting by they used both of them on air. So we know that thing is big. I have just measured the snow outside I have three inches here in O’Hara Township. We are looking for more snow thought the day. The Pittsburgh International airport is running on time still that will probably chance later with the change over to sleet and possibly freezing rain. That cannot be said for our neighbors to the east. Philly is having a 350 minute delay which is almost 6 hours!!
From the weather channel:
From the weather channel:
This will just get worst at the airports. Around the Pittsburgh area we will again see that change over to sleet by 5 pm. This is the absoule worst time that it could happen. Rush hour will be in full swing and this is horrible news for anyone around the region. If there is over 1/2" of sleetfall then a sleet warning will be posted this is very rare but could happen today into tonight.
So what is sleet?
Sleet is snow that partial has melted in the mid levels of the atmophere. The graphic clearly shows that the snow melts in that shallow warm layer.
From: http://ww2010.atmos.uiuc.edu/(Gl)/guides/mtr/cld/prcp/zr/sleet.rxml
Again the snow heavy at times will change over to snow then will change back later.
4 Am update
Yeah the time is right it's four am and I'm still up which can only mean one thing, A major storm is near the area. The storm that has been talked about for the past few days is reaching the Pittsburgh area. The National weather service has updated the winter storm warning to include more information and advice to the public.
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM EST WEDNESDAY...
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM EST WEDNESDAY.
A WINTER STORM WARNING REMAINS IN EFFECT FOR TUESDAY AND WEDNESDAY.
AN ADVANCING LOW PRESSURE SYSTEM WILL SPREAD SNOW ACROSS THE AREA THIS MORNING AND CONTINUING THROUGH TUESDAY NIGHT. THIS SNOW WILL MIX WITH SLEET BY LATE AFTERNOON AND CONTINUE INTO EARLY WEDNESDAY MORNING. SOME ISOLATED FREEZING RAIN IS ALSO POSSIBLE.
SNOW MAY BE HEAVY AT TIMES TODAY AND TONIGHT. 4 TO 8 INCHES OF SNOW COULD ACCUMULATE ACROSS THE SOUTHERN PORTIONS OF THE AREA BY WEDNESDAY AFTERNOON...WITH 6 TO 10 INCHES POSSIBLE TO THE NORTH. THE HEAVIER AMOUNTS ARE EXPECTED OVER AREAS TO THE NORTH OF PITTSBURGH.IN ADDITION...A PERIOD OF SLEET IS LIKELY ON TUESDAY EVENING...WITH FREEZING RAIN POSSIBLE FROM PITTSBURGH ON SOUTH.
WEDNESDAY WILL BE QUITE WINDY WITH FALLING TEMPERATURES.
A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...SLEET...AND ICE ARE EXPECTED. THIS WILL MAKE TRAVEL VERY HAZARDOUS. POWER OUTAGES ARE POSSIBLE IF A LARGE AMOUNT OF ICE ACCUMULATES ON POWER LINES.
TRAVEL ON TUESDAY THROUGH WEDNESDAY MORNING IS DISCOURAGED. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA FOR UPDATES ON THIS INCOMING WINTER STORM.
The National Weather Service in Pittsburgh doesn't often use this harsh of language. But I agree with them that it is critical that driving is discouraged.
Currently:
The radar is showing that Snow has began to push into the region. Note:In the south you will notice a strong line of severe storms are sparking some fears of tornadic activity in the great New Orleans area.
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM EST WEDNESDAY...
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM EST WEDNESDAY.
A WINTER STORM WARNING REMAINS IN EFFECT FOR TUESDAY AND WEDNESDAY.
AN ADVANCING LOW PRESSURE SYSTEM WILL SPREAD SNOW ACROSS THE AREA THIS MORNING AND CONTINUING THROUGH TUESDAY NIGHT. THIS SNOW WILL MIX WITH SLEET BY LATE AFTERNOON AND CONTINUE INTO EARLY WEDNESDAY MORNING. SOME ISOLATED FREEZING RAIN IS ALSO POSSIBLE.
SNOW MAY BE HEAVY AT TIMES TODAY AND TONIGHT. 4 TO 8 INCHES OF SNOW COULD ACCUMULATE ACROSS THE SOUTHERN PORTIONS OF THE AREA BY WEDNESDAY AFTERNOON...WITH 6 TO 10 INCHES POSSIBLE TO THE NORTH. THE HEAVIER AMOUNTS ARE EXPECTED OVER AREAS TO THE NORTH OF PITTSBURGH.IN ADDITION...A PERIOD OF SLEET IS LIKELY ON TUESDAY EVENING...WITH FREEZING RAIN POSSIBLE FROM PITTSBURGH ON SOUTH.
WEDNESDAY WILL BE QUITE WINDY WITH FALLING TEMPERATURES.
A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...SLEET...AND ICE ARE EXPECTED. THIS WILL MAKE TRAVEL VERY HAZARDOUS. POWER OUTAGES ARE POSSIBLE IF A LARGE AMOUNT OF ICE ACCUMULATES ON POWER LINES.
TRAVEL ON TUESDAY THROUGH WEDNESDAY MORNING IS DISCOURAGED. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA FOR UPDATES ON THIS INCOMING WINTER STORM.
The National Weather Service in Pittsburgh doesn't often use this harsh of language. But I agree with them that it is critical that driving is discouraged.
Currently:
The radar is showing that Snow has began to push into the region. Note:In the south you will notice a strong line of severe storms are sparking some fears of tornadic activity in the great New Orleans area.
The current surface map is showing the Low pressure system responsible for all this activity is still centered over Arkansas.
By 1 pm tomorrow the low moves towards the Northeast and heavy snow continues.
By the evening rush hour we will be looking at Snow, Sleet, and Freezing Rain, I think we will only see this for a few hours eventually changing back over to heavy snow. The primary factor are the temperatures both at the surface and the mid levels of the atmosphere as to how much snow does melt and change in the mid levels to sleet and freezing rain. (Rain will come down but back the surface is just so cold it freezing very quickly) Depending on the Freezing rain and sleet combined with the winds on Wednesday morning we could be looking at quite a few power outages. I will try to update before 1 pm.
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