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OK/MO/AR and into the OH valley heavy rain and flood threat


janetjanet998

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12z NAM still looking very bad..maybe shifted a little more north

short term:

2-4 inches of rain fell over night along the OH river...

at this time old MCV head may be over S IL...storms and rain redeveloing ahead of it...looks for very heavy rains today over the OH river much more then models have for during the day today

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SPC meso

WHILE THERE IS A HIGHER PROBABILITY FOR STRONGER STORMS TO FAVOR

LOCALES ALONG/S OF THE AFOREMENTIONED OUTFLOW BOUNDARY...STORMS

COULD ALSO DEVELOP WHERE INSOLATION HAS OCCURRED BETWEEN THE OUTFLOW

AND PRIMARY COLD FRONT N OF THE OH RIVER. TRAINING...VERY HEAVY

RAINFALL WILL LIKELY OCCUR ALONG/JUST N OF THE OH RIVER FROM NEAR

EVV NEWD TO NEAR/S OF KCVG THROUGH 18Z.

..RACY.. 04/23/2011

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12z NAM still looking very bad..maybe shifted a little more north

short term:

2-4 inches of rain fell over night along the OH river...

at this time old MCV head may be over S IL...storms and rain redeveloing ahead of it...looks for very heavy rains today over the OH river much more then models have for during the day today

I have a feeling we may be comparing photos from 1937 before it's all over.

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Mesoscale Discussion 534< Previous MDmcd0534.gif MESOSCALE DISCUSSION 0534 NWS STORM PREDICTION CENTER NORMAN OK 1051 AM CDT SAT APR 23 2011 AREAS AFFECTED...SRN IN...NRN KY...SRN OH...SWRN WV CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 231551Z - 231715Z THUNDERSTORMS WILL SLOWLY INCREASE IN NUMBER AND INTENSITY THROUGH EARLY AFTERNOON. PULSE SEVERE STORMS ARE EXPECTED WITH LARGE HAIL...GUSTY WINDS AND TRAINING HEAVY RAINFALL. PROBABILITY OF A SEVERE THUNDERSTORM WATCH ISSUANCE IS 40 PERCENT THROUGH EARLY AFTERNOON. OUTFLOW FROM OVERNIGHT STORMS HAS SETTLED JUST SOUTH OF THE OH RIVER IN SRN IND/NRN KY. BROAD...PERSIST AND MOIST WSWLY LOW-LEVEL FLOW REGIME IMPINGING ON THIS BOUNDARY WAS AIDING IN THE GENERATION OF THUNDERSTORMS LATE THIS MORNING. INSPECTION OF 12Z SOUNDINGS SUGGEST THAT THE VERY STEEP LAPSE RATE PLUME HAS ADVECTED QUITE FAR E SOUTH OF THE BAROCLINIC ZONE AND VIGOROUS UPDRAFTS WILL YIELD LARGE HAIL. MOREOVER...MODEST UNIDIRECTIONAL WSWLY FLOW REGIME ABOVE 1KM AT SPEEDS REACHING 55 KTS AT 6KM WILL BE FAVORABLE FOR OCCASIONAL BOWING STORM STRUCTURES GIVING DAMAGING WINDS AND PERHAPS A BRIEF TORNADO. WHILE THERE IS A HIGHER PROBABILITY FOR STRONGER STORMS TO FAVOR LOCALES ALONG/S OF THE AFOREMENTIONED OUTFLOW BOUNDARY...STORMS COULD ALSO DEVELOP WHERE INSOLATION HAS OCCURRED BETWEEN THE OUTFLOW AND PRIMARY COLD FRONT N OF THE OH RIVER. TRAINING...VERY HEAVY RAINFALL WILL LIKELY OCCUR ALONG/JUST N OF THE OH RIVER FROM NEAR EVV NEWD TO NEAR/S OF KCVG THROUGH 18Z. ..RACY.. 04/23/2011

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Hydrologist in a conf call. words like "record flooding" being used. It is important we understand the magnitude. #nwspah #tristatewx

It is imperative, that all weather based entities work together closely over the next several days. Incredible impacts possible. #FLOOD

The media is one of our biggest partners. We must get the message across collectively about this potentially historic flood event.

@johndissauer we are being told 1995 for the MS river and 1997 for the Ohio

@johndissauer Right now it looks like Cairo will be hardest hit.

Hydrologist informs me we are going public with contingencies today. #nwspah #tristatewx

All quotes from TweetDeck

Sounds like they are on top of things. Not a word out of LMK as of yet except for flash flooding, maybe with the afternoon discussion. If we get this much rain over such a wide area it's going to have no where to go.

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I am not understanding the lack of a Flash Flood Watch for NW AR. TSA's graphics as well as HWO seem to strongly support it, as does the fact of a 1"+ soaker already this morning. I get that we may have a break in the action for a while today, but I don't think this helps public awareness.

From the 1159am HWO in the Day 2+ section:

EMERGENCY MANAGEMENT PLANNING STATEMENT...

EMERGENCY MANAGEMENT OFFICIALS SHOULD BE PREPARED FOR THE POTENTIAL

OF SEVERAL ROUNDS OF SEVERE THUNDERSTORMS AND HEAVY RAINS...WHICH

COULD LEAD TO FLASH FLOODING AND POSSIBLY RIVER FLOODING.

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Is that yours?

Good grief.

yes, that's my call. Its hard to pinpoint where the training will be exactly, but usually where the emination point is, a V-shape swath fans out with the flow northeast, so I'm basing it roughly the Ozarks region as the emination point. Initially a northeast fanning, that transitions as the flow backs around 48 hours, and re-development more north/ne to s/sw.

People might not be paying attention now because of the Easter weekend but might come Monday. The possibility of historic flooding over a large area and a potential historic tornado outbreak will really be a double whammy if they occur this coming week.

I agree. A one two punch. The bootheel region and western KY, srn Ill, IND w. TN look to take a tremendous punch, when all is said and done.

http://www.shelbweather.blogspot.com

forgot to mention the SREF is a little more south . Once the 850 low strengthens is when the whole event finally culminates, by then a lot of rain will have fallen, and the severe begins.

post-38-0-67997900-1303588778.gif

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yes, that's my call. Its hard to pinpoint where the training will be exactly, but usually where the emination point is, a V-shape swath fans out with the flow northeast, so I'm basing it roughly the Ozarks region as the emination point. Initially a northeast fanning, that transitions as the flow backs around 48 hours, and re-development more north/ne to s/sw.

I agree. A one two punch. The bootheel region and western KY, srn Ill, IND w. TN look to take a tremendous punch, when all is said and done.

http://www.shelbweather.blogspot.com

forgot to mention the SREF is a little more south . Once the 850 low strengthens is when the whole event finally culminates, by then a lot of rain will have fallen, and the severe begins.

post-38-0-67997900-1303588778.gif

Is that your blog listed above? The link doesn't work whatever it is.

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wow just wow

looking at the short term another wave developing over MO will move into KY later this evening

its possible many counties will be under flash flooding for for several days straight

already have some issues

this looks like Nashville from last year only lasting longer

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Record breaking flooding now forecast the MS river Memphis wil have 3rd highest crest on record highest since 1937

BULLETIN - IMMEDIATE BROADCAST REQUESTED

FLOOD WARNING

NATIONAL WEATHER SERVICE MEMPHIS TN

109 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING FOR THE

MISSISSIPPI RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FOLLOWUP FLOOD STATEMENT WILL BE ISSUED TONIGHT OR SOONER IF

CONDITIONS WARRANT.

FOR GRAPHICAL RIVER AND FLOOD INFORMATION...PLEASE GO TO

WWW.WEATHER.GOV AND CLICK NEAR MEMPHIS ON THE MAP. THEN SELECT RIVERS

AND LAKES AHPS UNDER CURRENT CONDITIONS.

DO NOT DRIVE THROUGH FLOODED AREAS...TURN AROUND DON'T DROWN.

STAY TUNED TO YOUR WEATHER RADIO AND YOUR LOCAL NEWS MEDIA FOR THE

LATEST RIVER INFORMATION.

TNC045-095-MOC155-241809-

/O.CON.KMEG.FL.W.0033.000000T0000Z-000000T0000Z/

/TPTT1.3.ER.110420T0048Z.110505T0000Z.000000T0000Z.NR/

109 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS TN HAS ISSUED A

* FLOOD WARNING FOR

THE MISSISSIPPI RIVER AT TIPTONVILLE

* UNTIL FURTHER NOTICE.

* AT 12 PM SATURDAY THE STAGE WAS...39.7 FEET.

* MINOR FLOODING IS OCCURRING AND RECORD FLOODING IS FORECAST.

* FLOOD STAGE IS 37.0 FEET.

* THE RIVER ROSE ABOVE FLOOD STAGE TUESDAY EVENING AND WILL CONTINUE

RISING TO NEAR 48.0 FEET BY WEDNESDAY MAY 4. ADDITIONAL RISES

MAY BE POSSIBLE THEREAFTER.

AT 47.0 FEET, PORTIONS OF THE TIPTONVILLE LEVEE EXTENSION ARE OVER

TOPPED AT THIS LEVEL. EVACUATIONS IN THE LOW AREAS OF TIPTONVILLE

ARE NECESSARY.

ARC093-TNC045-095-097-MOC155-241808-

/O.CON.KMEG.FL.W.0031.000000T0000Z-000000T0000Z/

/CRTM7.3.ER.110415T2100Z.110506T1200Z.000000T0000Z.NR/

109 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS TN HAS ISSUED A

* FLOOD WARNING FOR

THE MISSISSIPPI RIVER AT CARUTHERSVILLE

* UNTIL FURTHER NOTICE.

* AT 12 PM SATURDAY THE STAGE WAS...36.8 FEET.

* MINOR FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST.

* FLOOD STAGE IS 32.0 FEET.

* THE RIVER ROSE ABOVE FLOOD STAGE FRIDAY APRIL 15 AND WILL CONTINUE

RISING TO NEAR 45.5 FEET BY FRIDAY MAY 6. ADDITIONAL RISES MAY

BE POSSIBLE THEREAFTER.

AT 45.0 FEET, THE FRONTLINE LEVEE ALONG THE MISSISSIPPI RIVER UP AND

DOWN FROM CHIC IN DYER COUNTY COULD BE TOPPED. ALL AREAS THAT ARE

PROTECTED BY THE FRONTLINE LEVEE COULD FLOOD..

ARC035-077-MSC033-143-TNC157-241808-

/O.EXT.KMEG.FL.W.0038.110428T1814Z-000000T0000Z/

/MEMT1.2.ER.110428T1814Z.110508T1200Z.000000T0000Z.UU/

109 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS TN HAS ISSUED A

* FLOOD WARNING FOR

THE MISSISSIPPI RIVER AT MEMPHIS

* FROM THURSDAY EARLY AFTERNOON UNTIL FURTHER NOTICE.

* AT 12 PM SATURDAY THE STAGE WAS...30.9 FEET.

* MODERATE FLOODING IS FORECAST.

* FLOOD STAGE IS 34.0 FEET.

* FORECAST TO RISE ABOVE FLOOD STAGE BY THURSDAY APRIL 28 AND

CONTINUE TO RISE TO NEAR 41.5 FEET BY SUNDAY MAY 8. ADDITIONAL

RISES ARE POSSIBLE THEREAFTER.

AT 40.0 FEET, HOMSTEADS ON ROBINSON CRUSO ISLAND ARE FLOODING. THERE

IS EXTENSIVE BACKWATER FLOODING ALONG THE WOLF AND LOOSAHATCHIE RIVER

IN WESTERN SHELBY COUNTY..

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was it last year or two years again Louisville had the serious flooding problems? going to post some images shortly of the rise in water from the Ohio river just in the last 24hrs.

August 4, 2009...severely impacted the main Louisville library with serious flood damage with that one downtown...but that was flash flooding . 50,000 books destroyed and the library closed through Labor Day.

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