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By: DocNDswamp , 9:19 AM GMT on January 27, 2014
Latest W Atlantic Basin AVN / IR Satellite Image...
Thu Jan 30 2014 update...
Coldest lows since Feb 1996 for several locations across Lousiana
C.C.C.C.Cold this morning, but warm up well ongoing as into 50's, gorgeous day... Saw an astonishing photo on WVUE Fox 8 this morn submitted by worker on oil rig some 30-40 miles below Terrebonne in the Gulf with sleet and snow covering the deck! From yesterday morn as last band precip was along coast / offshore... Sure, it wasn't the impressive snowfall wanted to see here, but coverage of what we did get - sleet, slurry and slain - reached far and wide.
Noted temps in mid-low 30's reported over N Gulf platforms past couple days... and this morn Amerada Pass station AMRL1, located to SSW of Morgan City in Atchafalaya Bay was freezing for 12 hrs overnight, dipped to a 26.8F low.
Rivaling or surpassing the cold of Jan 7th, low temps at several stations this morning were coldest since Feb 1996. Had a minimum of 15 hr duration freeze here, and a few locations did drop into the teens...
Lows across Houma-Thibodaux Region Jan 30 2014 ---
Thibodaux 4SE 18.0 (NWS Ag Observer)
Schriever PWS 19.6
Vacherie PWS 19.6
B Cane PWS: 19.8
Thibodaux PWS 20.3
USDA PWS : 20.6
B Blue PWS: 20.8 (15 on older thermo, suspect)
Maple Park PWS 21.4
Green Acres, Bourg PWS 21.6 (closest to, south of KHUM)
Houma KHUM 23.0
Raceland PWS 24.4
Cocodrie PWS 27.1
Dunno why KHUM didn't drop lower as station reached 25 by 10 PM last night and 23.7 before midnight... and previously on Jan 7th had hit 21... That coldest reading topping the local list - 18F reported by long-time, reliable NWS Ag Observer at Thibodaux was notable, also had a 19F on Jan 7th... So far, has had 3 days with a 32F low and 14 days freezing w below 32F readings for Jan 2014.
Marked 2nd time this month my own thermo fell into up teens... Lot of teens across state such as 17F Baton Rouge and Slidell, 19F at both Lake Charles and Lafayette. Coldest state temp I found was 11F at Tallulah in NE LA...
KLCH and KLIX NWS offices offerings of late include -
from KLCH, comprehensive list of station's lows Jan 30th... some of these may be posted tomorrow under Record Event Reports. And from KLIX posted yesterday, review and list sleet / snow accumulations.
Mon Jan 27 2014
Winter Storm Watch in effect as Gulf Coast Snow / Ice Storm #2 looms
Snow would be nice... not so the ice!
As we round out what has been deemed likely one of the coldest Januarys on record for SE LA by New Orleans NWS Office KLIX, Winter Storm Watches are flying, covering an enormous swath extending E / NE from interior S Cen / SE TX across all of Southern LA, MS, AL, NW FL, Cen GA all the way to coastal Carolinas, and likely to be changed to Winter Storm Warnings by Tuesday as conditions steadily deteriorate.
SE LA - and most of the immediate Gulf Coast region to Carolinas - likely to see historic ice / snow storm causing major havoc Tuesday / Wednesday. Arctic front offering sharply colder air arrives Monday and Tuesday into the Deep South as broad upper trof / jet stream energy associated with Hudson Bay lobe of the polar vortex digs SWD over majority CONUS once again, aided by a series of mid-up disturbances / diminishing vort max over Mexico swinging around the base of the trof deliver a second round of rain, freezing rain, sleet and substantial snowfall accumulations. All this occurring within scant 4 days after previous Winter Storm impacted eastern Texas, most of Louisiana into MS / AL late last week on Thu Jan 23 / Fri Jan 24th, dropping 1-4" snow - the heaviest near the lakes region of E TX across W Cen LA - along with sleet and freezing rain encompassing the region that shut down travel, expanding to include many SE LA roadways as bridges / overpasses froze and glazed over by Friday night before precip terminated... Prior to that, it was mostly a cold rain / sleet mix event for lot of southern half SE LA, moderated by warm nose aloft and weakening CAA that lead to sharp demarcation with sfc temps (low-mid 30's) from areas short distance to N and W (mid-up 20's). The snowfall set several daily records (3" Alex) with the cold notable as well, breaking coldest maximum records such as 31F Lake Charles, and 30F at both Lafayette and Alexandria, the latter clipping the previous 32F set in 1915.
This 2nd storm appears certain to be even more significant, perhaps a longer duration event with potential for heavier precipitation amts leading to treacherous conditions areawide beginning overnight Monday / Tuesday, increasing in coverage, intensity of frozen precip Tuesday into Wednesday with temps at or below freezing for most 3 day period... Particularly concerning our local area of SE LA - Houma to NOLA metros / coastal parishes - where some model output is indicating potential for 1"-1.25" precip falling over 12-24 hr period, likely the bulk as rain to freezing rain causing severe icing problems, transitioning to sleet and snow Tue night before ending Wed morning. Model soundings / critical thickness projections per usual indicate our proximity to moderating Gulf influence all but guarantees an above-freezing warm layer around 900-800 mb causing precip melt, refreezing on contact thus nasty freezing rain / icing... how long till warm layer erodes, how much of what, etc, to be seen. Taking a foolish guess at this early stage, seems a chance the Houma metro region could get around .30-.50" of cold rain, about 1/4" or more of icy glaze / sleet and 1-2" of snow... lol, reality will dictate allocations. Hey, enough of cold rain, may as well dream for a quicker warm layer erosion / transition and get a whopping 4-8" snowfall where typically least expected! And why not? Oh well... I'm sure Houma's all-time record 16" snowfall Feb 1895 will stay intact. ;)
But whatever our record for a severe ice storm is may well be challenged!
Please stay safe all... gonna get really ugly with black ice before (or if) it's overlaid by white.
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