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December 21-22 Heavy Rain/Flooding/Severe? Threat


Hoosier

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ILN siding with the GFS.

 

 

 

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
405 PM EST FRI DEC 20 2013

.SYNOPSIS...
A WARM...SOUTHERLY FLOW WILL CONTINUE TO PULL MOISTURE ACROSS THE
REGION INTO SATURDAY NIGHT. A FRONTAL BOUNDARY WILL BE THE FOCUS
FOR SIGNIFICANT RAINFALL LATE TONIGHT INTO SATURDAY NIGHT. COLDER
CONDITIONS WILL MOVE IN BEHIND A COLD FRONT FOR SUNDAY AND SUNDAY
NIGHT AND THE FIRST PART OF NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
PCPN HAS BECOME VERY ISOLATED ATTM...WITH THE RADAR ONLY SHOWING
ECHOS IN THE EXTREME ERN COUNTIES. PCPN SHOULD BEGIN TO REDEVELOP
THIS EVENING AS AN AREA OF PVA LIFTS NE UP THE OH VALLEY. THIS
WILL INCREASE THE VERTICAL VELOCITIES. AT LOWER
LEVELS...CONVERGENCE WILL ALSO INCREASE. THE MODELS ARE A LITTLE
QUICKER WITH THE SURGE OVER HEAVIER PCPN...NOW BRINGING IT IN
BETWEEN 06-12Z. THIS COINCIDES WITH AN INCREASE OF PW OVER 1
INCH. PORTIONS OF THE FA...ESPECIALLY SE INDIANA INTO THE MIAMI
VALLEY COULD SEE QPF AMOUNTS OF AROUND AN INCH BY SUNRISE.

TEMPERATURES WILL ONCE AGAIN MEANDER OVERNIGHT. THE COOLEST WILL
BE IN THE NW COUNTIES IN OH DOWN INTO THE WHITEWATER VALLEY WHERE
THE MERCURY WILL DROP INTO THE LOWER TO MID 40S. MUCH OF THE REST
OF THE FA WILL SE LOWS IN THE LOWER 50S.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/...
FRONTAL BOUNDARY WILL REMAIN STRADDLED ACROSS THE FA SATURDAY.
BROAD SW FLOW ALOFT WILL CONTINUE TO TAP GULF MOISTURE PULLING PW
OF OVER 1.5 INCHES INTO THE REGION. THIS IS OVER 300 PERCENT OF
NORMAL AND NEAR SEASONAL MAX.

MODELS ARE CONVERGING ON A SOLUTION WHERE THE HEAVY RAIN BAND WILL
SET UP ACROSS THE WHITEWATER VALLEY ACROSS THE MIDDLE MIAMI VALLEY
INTO THE UPPER SCIOTO VALLEY SATURDAY MORNING. THEN AS LOW
PRESSURE LIFTS N UP THE MS VALLEY THE FNT SHIFTS N A LITTLE TO MORE
OF THE NRN MIAMI VALLEY BY 00Z. WILL CONTINUE WITH THE FLOOD WATCH
AS IT IS NOW.

THIS RUN IS SUGGESTING A LITTLE MORE OF SVR WEATHER POSSIBILITY
SATURDAY EVENING INTO SATURDAY NIGHT THAN PREVIOUS RUNS. MODELS
ARE BRINGING A H8 JET OF 60-80KT INTO THE REGION. MODELS CONTINUE
TO SHOW SOME INSTABILITY...SO IF A STORM COULD DEVELOP THERE IS
THE POTENTIAL FOR SOME SEVERE WEATHER. DID NOT MENTION IT IN THE
ZFP YET...BUT WILL MENTION IT IN THE HWO THIS AFTN.


THE LOW LIFTS N OF THE REGION BY 12Z SUNDAY...WHICH SHOULD HELP
WHIP THE FNT AND MUCH OF THE CONVECTION THRU THE REGION. THERE IS
A WIDE RANGE OF SOLUTIONS FOR POST FRONTAL PCPN SUNDAY INTO SUNDAY
NIGHT...THE THE GFS BEING WETTEST AND THE NAM THE DRIEST. DIDNT
WANT TO DIVERGE TOO MUCH FROM THE PREVIOUS FORECAST SO LEANED

TOWARDS THE WETTER GFS. THICKNESSES DROP LOW ENUF SUNDAY NIGHT
THAT ANY PCPN WOULD FALL AS SNOW.

HIGHS ON SATURDAY FOR MOST OF THE FA WILL BE ABOVE NORMAL...DESPITE
THE HIGH RAIN CHANCES. MID TO UPPER 60S ARE POSSIBLE ACROSS NRN KY
INTO THE LOWER SCIOTO VALLEY. ACROSS THE NRN MIAMI VALLEY
HIGHS IN THE UPPER 40S OR LOWER 50S ARE EXPECTED. TEMPERATURES WILL
REMAIN UP SATURDAY NIGHT WITH THE SE ONLY FALLING INTO THE LOWER
60S. HIGHS ON SUNDAY WILL BE EARLY DUE TO THE COLD ADVECTION.
TEMPERATURES WILL BE FALLING FOR MUCH OF THE DAY. SOME STRONG
WINDS GUSTS MAY BE POSSIBLE SUNDAY...MAYBE OVER 30KTS. WILL
HIGHLIGHT THIS GUSTINESS IN THE HWO ALSO.
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Considering the ponding and puddling already happening here, I really hope we don't get the 2+" here, especially if we get it in a short duration. Could be some major flooding that would occur here considering most of the metro Detroit area has snow cover still around. At my house alone I was sitting at 4" of waterlogged snow on the ground.

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Considering the ponding and puddling already happening here, I really hope we don't get the 2+" here, especially if we get it in a short duration. Could be some major flooding that would occur here considering most of the metro Detroit area has snow cover still around. At my house alone I was sitting at 4" of waterlogged snow on the ground.

 

Yeah my father lives along the Portage River here in NW Ohio, with 4" of rain on this frozen ground it is going to be an all out mess here. Hopefully he doesn't have too much flooding there, could be very comparable to January 2005, the only thing is these rivers are all completely frozen. Ice jams could really complicate things here

 

Findlay needs to be on high alert as well, already predicted to hit major flood stage

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Adding thunderstorm potential to a heavy rain potential is just going to make things worse, I wouldn't be shocked to see some of the QPF totals being too low, especially if you get training of the storms.

Ya, couldn't agree more. the thunderstorms firing south are already starting and that heavy rain from them will ride north elevating qpf totals in areas that see them...keep in mind too if the heavy rain falls north into the river system, the effects will be felt farther down stream even with lower qpf totals

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Heavy rains have already fallen overnight in SW IN. Bad feeling that we will be seeing many more of these totals as the day progresses.

 

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
832 AM EST SAT DEC 21 2013

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0831 AM HEAVY RAIN 4 E VINCENNES 38.68N 87.46W
12/21/2013 M2.85 INCH KNOX IN CO-OP OBSERVER

AMOUNT IS STORM TOTAL PRECIPITATION

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Heavy rains have already fallen overnight in SW IN. Bad feeling that we will be seeing many more of these totals as the day progresses.

 

PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE INDIANAPOLIS IN

832 AM EST SAT DEC 21 2013

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0831 AM HEAVY RAIN 4 E VINCENNES 38.68N 87.46W

12/21/2013 M2.85 INCH KNOX IN CO-OP OBSERVER

AMOUNT IS STORM TOTAL PRECIPITATION

 

 

 

SW Indiana is going to just get hammered next week.  Over a foot of snowmelt and local rains are going to have things bankfull or better and White, Wabash, and Ohio are going to bring in the coup de grace.  Merry Christmas.

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From IND, several reports of water over roads in several places. This is what worries me most with this system. So much flooding potential and people already don't heed warnings on a normal day. With everyone traveling this weekend I hope they all take it seriously and turn around.

Checking also their radar precip estimates. Some areas are low by an inch possibly.

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Taking a look at CIPS analog guidance, it shows severe wind reports into northern KY ending abruptly at the ohio river. (Typical??)

I think the SPC might be pulling a CYA move with the slight risk so far north. That being said, its because an isolated higher wind gust will be possible tonight for the entire OV region. What it will come down to is the instability needed for stronger uodrafts and downdrafts to pull down the extreme wind aloft.

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Taking a look at CIPS analog guidance, it shows severe wind reports into northern KY ending abruptly at the ohio river. (Typical??)

I think the SPC might be pulling a CYA move with the slight risk so far north. That being said, its because an isolated higher wind gust will be possible tonight for the entire OV region. What it will come down to is the instability needed for stronger uodrafts and downdrafts to pull down the extreme wind aloft.

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Models show a pretty strong squall line moving into Ohio overnight, might not be a lot of instability but there is some up into Ohio. I think there call is pretty much a correct one at this junction. Plus with the wind fields in place it won't take much to bring down the winds that are just off the surface.

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Taking a look at CIPS analog guidance, it shows severe wind reports into northern KY ending abruptly at the ohio river. (Typical??)

I think the SPC might be pulling a CYA move with the slight risk so far north. That being said, its because an isolated higher wind gust will be possible tonight for the entire OV region. What it will come down to is the instability needed for stronger uodrafts and downdrafts to pull down the extreme wind aloft.

Sent from my XT1060

 

Models show a pretty strong squall line moving into Ohio overnight, might not be a lot of instability but there is some up into Ohio. I think there call is pretty much a correct one at this junction. Plus with the wind fields in place it won't take much to bring down the winds that are just off the surface.

Exactly. It won't take a ton, but we do need some. I agree, if we get just enough then watch out...could be a bumpy evening.

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Just took a drive and wow at the runoff.  When I left we had just an inch and a half of rain over a good 7 or 8 hour period and creeks and side ditches are all overflowing.  Typical of what you would see after a 3 or 4 inch an hour summer storm.  Sitting at 2 inches now and I would say we are halfway home.

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Beau Dodson reporting 4.06" at his house in Massac county. Meanwhile:

 

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PADUCAH KY
1106 AM CST SAT DEC 21 2013

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1105 AM HEAVY RAIN WARE 37.45N 89.39W
12/21/2013 M4.90 INCH UNION IL PUBLIC

PUBLIC REPORT. STORM TOTAL SO FAR.

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Beau Dodson reporting 4.06" at his house in Massac county. Meanwhile:

 

PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE PADUCAH KY

1106 AM CST SAT DEC 21 2013

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

1105 AM HEAVY RAIN WARE 37.45N 89.39W

12/21/2013 M4.90 INCH UNION IL PUBLIC

PUBLIC REPORT. STORM TOTAL SO FAR.

 

Already?! Jesus some places might push 7-8" at this rate.

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