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Upper Terrebonne Parish, LA Weather and Climate Synopsis

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National Weather Service Shreveport LA
553 PM CST Sun Dec 17 2017

.AVIATION...
The IFR/LIFR cigs have begun to lower early this evening,
especially over SW AR/N LA, with areas of FG beginning to develop
across these areas. This trend should eventually spread into E TX
by mid to late evening, with all of the region likely seeing FG
(some of it dense) which should linger through mid to late morning
Monday. Am expecting only very slow improvements to cigs/vsbys by
midday, but LIFR/IFR cigs with reduced vsbys may persist through 
the afternoon. Can't rule out isolated to widely sct -SHRA
developing during the afternoon across portions of E TX/N LA, but
low confidence precludes VCSH mention attm. Sct SHRA should begin
to increase Monday night over the region as a warm front begins to
shift N into E TX/N LA helping to focus this development ahead of
a closed low that will begin to eject E across Nrn Old MX. Look
for Lt/Vrb winds to persist through the TAF period. /15/ 

National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

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Hourly Observations For UPPER TERREBONNE Parish
700 PM CST SUN DEC 17 2017

SOUTHEAST LOUISIANA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
N.O. INTL ARPT CLOUDY    68  68 100 S6        30.10S FOG              
N.O. LAKEFRONT CLOUDY    67  66  97 SE8       30.10F                  
N.O. DOWNTOWN* CLOUDY    67  66  97 S7        30.12S                  
RESERVE*       MOCLDY    66  64  93 CALM      30.10S FOG              
SLIDELL        CLOUDY    66  65  96 S3        30.09F                  
BATON ROUGE    CLOUDY    61  61 100 CALM      30.10R FOG              
BOOTHVILLE     CLOUDY    65  64  97 E6        30.13R FOG              
BELLE CHASSE   NOT AVBL                                               
BOGALUSA*      CLOUDY    66  63  90 MISG      30.11S                  
GALLIANO*      CLOUDY    66  64  92 E5        30.12R FOG              
NEW ROADS*     CLOUDY    61  61  99 CALM      30.10S FOG              
GONZALES*      CLOUDY    64  64 100 CALM      30.09S FOG              
HAMMOND*       CLOUDY    63  63 100 CALM      30.11R FOG              
HOUMA*         CLOUDY    65  65  99 SE5       30.11R FOG              
PORT FOURCHON* CLOUDY    66  66 100 E6        30.14R FOG              

Current Temperatures, Dewpoint, RH, Wind, Surface 4-Panel


Current Agricultural Weather Conditions in Louisiana
Based on observations at 600pm CST, Sunday December 17, 2017

Across Louisiana...temperatures are near 49 degrees north, near 55 degrees central, and near 68 degrees south. Current sky conditions are cloudy north, mostly cloudy central, and cloudy south. In the north, relative humidity is near 100%, and the dew point is near 49 degrees. In the central part of the state, relative humidity is near 94%, and the dew point is near 54 degrees. In the south, relative humidity is near 100%, and the dew point is near 68 degrees. There is patchy fog north. Winds are calm in the north, where conditions are favorable for spraying. Winds are calm in the central, where conditions are favorable for spraying. Winds are coming from the southeast at 7 mph in the south, where conditions are favorable for spraying. The livestock cold stress index is in the no stress category north, no stress category central, and no stress category south. Based on current available observations, the highest temperature is 68 degrees at N.O. INTL ARPT. The lowest temperature is 49 degrees at Shreveport and DTN Shreveport.


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this Parish will these
forecasts be issued. Currently, there is no short term forecast in effect.

All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For UPPER TERREBONNE County, LA

440 PM CST Sun Dec 17 2017

 DAY ONE  Tonight

Areas of fog are expected overnight. The fog may become dense at 
times, especially over and near lakes, rivers, bayous, and other 
bodies of water.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

Areas of fog are expected Monday morning and again Monday night and 
Tuesday morning. The fog may be dense at times, especially over and 
near lakes, rivers, bayous, and other bodies of water.

Isolated to scattered thunderstorms will be possible Monday and 
again Tuesday night. Organized severe thunderstorms are not expected 
at this time. 

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not anticipated at this time.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For UPPER TERREBONNE Parish, LA
513 PM CST Sun Dec 17 2017


DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST MONDAY

TONIGHT
Cloudy. Slight chance of showers and thunderstorms in the evening, then chance of showers and slight chance of thunderstorms after midnight. Areas of dense fog through the night. Lows in the mid 60s. Southeast winds to 5 mph. Chance of precipitation 50 percent.

MONDAY
Cloudy. Areas of dense fog in the morning. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers in the afternoon. Highs in the mid 70s. South winds to 10 mph. Chance of precipitation 50 percent.

MONDAY NIGHT
Mostly cloudy. A 20 percent chance of showers in the evening. Patchy fog in the evening, then areas of fog after midnight. Lows in the mid 60s. Southeast winds around 5 mph.

TUESDAY
Partly cloudy with a 20 percent chance of showers. Highs in the upper 70s. South winds 5 to 10 mph.

TUESDAY NIGHT
Mostly cloudy. Chance of showers in the evening, then showers likely and chance of thunderstorms after midnight. Lows in the mid 60s. South winds 5 to 10 mph. Chance of precipitation 60 percent.

WEDNESDAY
Partly cloudy with a 50 percent chance of showers. Highs in the mid 70s.

WEDNESDAY NIGHT
Cooler. Mostly clear. Lows in the lower 50s.

THURSDAY
Sunny in the morning then becoming partly cloudy. Highs in the lower 70s.

THURSDAY NIGHT
Partly cloudy with a 20 percent chance of showers. Lows in the lower 60s.

FRIDAY
Partly cloudy with a 30 percent chance of showers. Highs in the mid 70s.

FRIDAY NIGHT
Mostly cloudy with rain showers likely. Lows in the upper 50s. Chance of showers 70 percent.

SATURDAY
Mostly cloudy with a 40 percent chance of rain showers. Highs in the upper 60s.

SATURDAY NIGHT
Mostly cloudy. Slight chance of rain showers in the evening, then chance of rain showers after midnight. Lows in the mid 50s. Chance of showers 30 percent.

SUNDAY
Mostly cloudy with a 50 percent chance of rain showers. Highs in the mid 60s.

12-48 Hr Surface Forecast Maps, TWC 4-Panel Surface Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip, Severe Weather Pot.-Day 1, Day 2


UPPER TERREBONNE County, Louisiana Agriculture, Lawn & Garden Weather Advisory

Current Weather Advisory is NOT available

Ag. Weather Forecast Parameter Maps:Spraying Conditions , Dewpoint Temperatures, Livestock Heat Stress

Medium & Long Range Outlook For Louisiana

                            LOUISIANA                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   DEC 23-27 DEC 25-DEC 31    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:     Normal        Below      Above      Above                      
 Precipitation:      Above        Above      Below      Below                      

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
Almanac Information

Sunday December 17, 2017 the 351th Day of Year

---------------------------------------------------
SUN
Declination -23.380000
Distance 0.999725 AU
Rise 08:02 EST Set 18:07 EST
Transit Meridian 13:04 EST
Civil Twilight Begins 07:36 EST Ends 18:33 EST

Calculations made for central point in the state.
Time in ET -- and will vary due to location and
elevation -- Priddy


Historical Weather And Climate Facts For Today

DECEMBER 17TH
HISTORIC WEATHER EVENTS
...1884...
A three week blockade of snow began at Portland OR. A record December total
of 34 inches was received. (David Ludlum)
...1924...
A severe icestorm struck central Illinois. It coated the ground with nearly
two inches of glaze at Springfield. The storm caused 21 million dollars
damage along with much hardship. Ice was on the trees until the 4th of
January, and electricity was not restored until January 10th. (David
Ludlum)
...1929...
An icestorm in western New York State resulted in much damage and hardship.
A Buffalo report stated, "one was kept awake by the breaking limbs, which
snapped off with a report much louder than a rifle shot." (17th-18th) (The
Weather Channel)
...1987...
A storm in the southwestern U.S. brought heavy rain and heavy snow to parts
of California, Nevada, Arizona, Utah and New Mexico. Charleston NV was
blanketed with 12 inches of snow. Lake Havasu City AZ was drenched with
2.26 inches of rain. (Storm Data) (The National Weather Summary)
...1988...
Squalls brought locally heavy snow to the southeastern shores of Lake
Michigan. Totals in Michigan ranged up to 14 inches at Harvey. Totals in
Ohio ranged up to 16 inches at Chardon. (The National Weather Summary)
(Storm Data)
...1989...
Twenty-one cities from Kentucky to Pennsylvania reported record low
temperatures for the date, including Columbus OH with a reading of 12
degrees below zero. Heavy snow continued in the Colorado Rockies. Vail
received 65 inches of snow between the 14th and the 18th of December.
Steamboat Springs was buried under 74 inches, and reported a total of 108
inches of snow between the 10th and the 18th of the month. (The National
Weather Summary) (Storm Data)

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky