A Question For The Weather Nerds...

HeyEng

Well-Known Member
I tend to get my weather from the NWS. The local TV meteorologists are a bunch of idiots and the NWS seems to forecast pretty well. As a rule, I tend to read the "scientific discussion" they put out every few hours. Anyway, the last few updates have discussed the "tropical depression" (officially named TD 2) extensively and on every update for the last 12-18 hours they have been calling "TD 2" "dew point 2". Why would they be calling it "dew point"? I almost have to think it has something to do with the software they use to put out the reports, but maybe one of cool guys out there have a better answer. Here is latest update:

Discussion...
heavy rains from dew point 2 remains likely across much of the area this
evening where feeder showers continue to move onshore across nearly
all of the Texas coast. With the dew point weakening and moving roughly
parallel and to the south of the Rio Grande overnight...the heavy
rain potential will contract southwest over the next 6-12 hours
toward the center of circulation. This process will become more
dramatic after dark...with another 1 to 3 inches of rain possible
across all of south central Texas for the tonight period. Later
this evening the next shift will be able to assess additional
model and upper air analysis and decide if probability of precipitation and flood
potential will possibly lower from east to west after midnight.
The flash Flood Advisory will likely remain intact through tonight for the Edwards
Plateau and Rio Grande plains where there is a slight possibility
of a core rain event extending as far north as del Rio. Highest
quantitative precipitation forecast is over Maverick County from 12-18z where feeder cells could
train around the northern part of the disturbance as it tracks SW
of Laredo. Another concern is that secondary rotations can be
seen already on radar...and these small features could expand the
area of influence of dew point 2 through early Friday morning. All of
this makes for a sensitive situation for the communities along the
Rio Grande as significant flooding continues in response to the
rains from former Hurricane Alex.
 
I tend to get my weather from the NWS. The local TV meteorologists are a bunch of idiots and the NWS seems to forecast pretty well. As a rule, I tend to read the "scientific discussion" they put out every few hours. Anyway, the last few updates have discussed the "tropical depression" (officially named TD 2) extensively and on every update for the last 12-18 hours they have been calling "TD 2" "dew point 2". Why would they be calling it "dew point"? I almost have to think it has something to do with the software they use to put out the reports, but maybe one of cool guys out there have a better answer. Here is latest update:

Discussion...
heavy rains from dew point 2 remains likely across much of the area this
evening where feeder showers continue to move onshore across nearly
all of the Texas coast. With the dew point weakening and moving roughly
parallel and to the south of the Rio Grande overnight...the heavy
rain potential will contract southwest over the next 6-12 hours
toward the center of circulation. This process will become more
dramatic after dark...with another 1 to 3 inches of rain possible
across all of south central Texas for the tonight period. Later
this evening the next shift will be able to assess additional
model and upper air analysis and decide if probability of precipitation and flood
potential will possibly lower from east to west after midnight.
The flash Flood Advisory will likely remain intact through tonight for the Edwards
Plateau and Rio Grande plains where there is a slight possibility
of a core rain event extending as far north as del Rio. Highest
quantitative precipitation forecast is over Maverick County from 12-18z where feeder cells could
train around the northern part of the disturbance as it tracks SW
of Laredo. Another concern is that secondary rotations can be
seen already on radar...and these small features could expand the
area of influence of dew point 2 through early Friday morning. All of
this makes for a sensitive situation for the communities along the
Rio Grande as significant flooding continues in response to the
rains from former Hurricane Alex.

I have nothing for you about the dew point 2, and I'm also curious as to why that is.
As to the reason the TV weathermen being idiots, that's because most TV weatherman have absolutely no education in weather. They simply read a prompter.
 
I have nothing for you about the dew point 2, and I'm also curious as to why that is.
As to the reason the TV weathermen being idiots, that's because most TV weatherman have absolutely no education in weather. They simply read a prompter.

I agree. A dew point "2" wouldn't bring any precipitation unless the actual temperature was around 4-5. You probably already know this, but the closer the temperature and dewpoint are to each other, the more likely falling precipitation will occur. The weatherguesser probably meant to say 82 or 92.
 
Its probably an autoreplace script. Td is typically used to represent dew point unless you are using something that undestands T_d (subscript), which is the variable representation typically used for dewpoint in equations.

Also, if you want the discussions, you are better off just geting them from the source. For tropical, www.nhc.noaa.gov.

http://www.nhc.noaa.gov/text/refresh/MIATCDAT2+shtml/082031.shtml for example.

That makes sense. I figured it had to do something with the software/abbrv/etc. I get the discussions off the NWS website, and NOT from the clowns on TV. Like I said, they are usually pretty good on the forecasts.

In this particular case, the local office was discussing the TD quite a bit since it was impacting our weather.
 
I agree. A dew point "2" wouldn't bring any precipitation unless the actual temperature was around 4-5. You probably already know this, but the closer the temperature and dewpoint are to each other, the more likely falling precipitation will occur. The weatherguesser probably meant to say 82 or 92.

Yep, I got the temp/dp spread stuff down pretty good. I think I am "above average" on weather, at least in comparison with the average Joe Blow. I do have a fascination with it...

I hope I don't have to be somewhere the dewpoint is 92. That would suck OUT LOUD!!!
 
The local TV meteorologists are a bunch of idiots

Si señor.

I've seen more crapped pulled out of the "butt bank" on TV weather reports than anything else.

Arizona can be just as bad as Florida for TV weather reports. If not even worse.

"Tempe is 108, Mesa is 107, there's a 10% chance of rain..."

Wait, call it 108 degrees as one or two degree differences are within the instrument error of the measuring devices you're using IF they're set up in identical testbeds and there's always 100% chance of rain, but the probability, well that's a different story.
 
Back
Top