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St. Helena Parish, LA Weather and Climate Synopsis

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US Weekly Rainfall Departure



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A joint service of the UK Ag Weather Center and the National Weather Service.


National Weather Service Shreveport LA
339 PM CDT Sat Oct 20 2018

.SHORT TERM...Tonight through Sunday Night/

In wake of the cold front moving across North Louisiana and East 
Texas this afternoon, drier air will move into the Four State 
Region clearing out the remaining low level clouds as high 
pressure on the surface and aloft build into the region. High 
level moisture will spread into the area but will be thin and not 
allow the cold temperatures to dip as low as expected for Sunday 
night under less cloud cover. No rain is expected through the 
short term as dry weather is in store. Low temperatures overnight 
will range from near 40 North to the lower 50s South with slightly
cooler reading for Sunday night ranging from the upper 30s North 
to the upper 40s Southwest. Daytime high temperatures on Sunday 
will range from near 60 Northeast to the upper 60s Southwest. /06/


.LONG TERM.../Monday through Friday Night/ 

Surface high pressure stretching from the eastern seaboard to the 
Red River Valley combined with weak upper-level ridging aloft to 
maintain dry conditions across the region on Monday and Tuesday. 
Temperatures on both days to range from highs in the lower 60s to 
lows in the 40s. 

Gradual warming trend expected on Wednesday and Thursday as moisture 
and cloud-cover increase due to a weak disturbance in the Gulf of 
Mexico. Southwest flow aloft to maintain mostly cloudy skies with 
scattered showers and isolated thunderstorms each day. 

Northwest flow aloft to sweep moisture south and eastward late in 
the work week with skies gradually clearing from the northwest. 
Temperatures on Friday to range from highs in the upper 60s to lows 
in the 50s. /05/

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

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Regional Hourly Observations For ST. HELENA County

SWR not available
Current Temperatures, Dewpoint, RH, Wind, Surface 4-Panel
Current Agricultural Weather Conditions in Louisiana
Based on observations at 400pm CDT, Saturday October 20, 2018

Across Louisiana...temperatures are near 70 degrees north, near 66 degrees central, and near 78 degrees south. Current sky conditions are mostly sunny north, light rain central, and light rain south. In the north, relative humidity is near 70%, and the dew point is near 60 degrees. In the central part of the state, relative humidity is near 95%, and the dew point is near 64 degrees. In the south, relative humidity is near 87%, and the dew point is near 74 degrees. There is patchy fog central. Winds are coming from the north at 12 mph in the north, where conditions are favorable for spraying. Winds are coming from the north at 8 mph in the central, where conditions are not favorable for spraying due to light rain. Winds are coming from the northwest at 14 mph with gusts at 20 mph in the south, where conditions are not favorable for spraying due to strong winds and light rain. Based on current available observations, the highest temperature is 79 degrees at New Orleans Lakefront, New Iberia, Lafayette, and Baton Rouge. The lowest temperature is 64 degrees at Tallulah.


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 ST. HELENA County, LA

1110 AM CDT Sat Oct 20 2018

 DAY ONE  This Afternoon and Tonight

A Small Craft Advisory is in effect tonight for all of the coastal
waters. Northeast winds of 20 to 30 knots and seas of 5 to 9 feet
can be expected to develop tonight.

 DAYS TWO THROUGH SEVEN  Sunday through Friday

A Small Craft Advisory will remain in effect through Sunday afternoon
for the sounds and tidal lakes and Sunday evening for the open
Gulf waters as northeast winds of 20 to 30 knots and seas of 5 to
9 continue. 

Additional small craft advisory conditions may develop on Tuesday
and linger through Friday as a low pressure system moves through
northern Gulf of Mexico. 

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not anticipated.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For ST. HELENA Parish, LA
348 PM CDT Sat Oct 20 2018

TONIGHT
Cloudy in the evening then clearing. Lows in the lower 50s. North winds 5 to 10 mph.

SUNDAY
Sunny. Highs in the upper 60s. Northeast winds 5 to 10 mph.

SUNDAY NIGHT
Colder. Mostly clear. Lows in the lower 40s. Northeast winds around 5 mph.

MONDAY
Partly cloudy. Highs in the mid 70s. Northeast winds to 5 mph.

MONDAY NIGHT
Warmer, cloudy. Slight chance of rain showers in the evening, then chance of rain showers after midnight. Lows in the mid 50s. Northeast winds to 5 mph. Chance of showers 30 percent.

TUESDAY
Cloudy with a 40 percent chance of rain showers. Highs in the lower 70s.

TUESDAY NIGHT
Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 50s.

WEDNESDAY
Mostly cloudy. Slight chance of rain showers in the morning, then chance of rain showers in the afternoon. Highs in the mid 70s. Chance of showers 40 percent.

WEDNESDAY NIGHT
Cloudy with showers likely. Lows in the lower 60s. Chance of showers 60 percent.

THURSDAY
Cloudy. Chance of showers in the morning, then slight chance of showers in the afternoon. Highs in the lower 70s. Chance of showers 40 percent.

THURSDAY NIGHT
Mostly cloudy with a 20 percent chance of rain showers. Lows around 60.

FRIDAY
Mostly cloudy with a 20 percent chance of rain showers. Highs around 70.

FRIDAY NIGHT
Partly cloudy with a 20 percent chance of rain showers. Lows in the mid 50s.

SATURDAY
Sunny. Highs in the lower 70s.

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


ST. HELENA 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 
                   OCT 26-30 OCT 28-NOV 3    OCT       OCT-DEC                      
                 -----------  -----------  --------  ---------
   Temperature:      Below       Normal                                            
 Precipitation:      Below       Normal                                            

....  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

Saturday October 20, 2018 the 293th Day of Year

---------------------------------------------------
SUN
Declination -10.680000
Distance 0.999721 AU
Rise 08:15 EDT Set 19:30 EDT
Transit Meridian 13:52 EDT
Civil Twilight Begins 07:52 EDT Ends 19:53 EDT

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

////////////////////////////
OCTOBER 20TH
HISTORIC WEATHER EVENTS
...1770...
An exceedingly great storm struck eastern New England causing extensive
coastal damage from Massachusetts to Maine, and the highest tide in 47
years. (David Ludlum)
...1983...
Remnants of Pacific Hurricane Tico caused extensive flooding in central and
south central Oklahoma. Oklahoma City set daily rainfall records with 1.45
inch on the 19th, and 6.28 inches on the 20th. (17th-21st) (The Weather
Channel)
...1987...
Cold arctic air invaded the Upper Midwest, and squalls in the Lake Superior
snowbelt produced heavy snow in eastern Ashland County and northern Iron
County of Wisconsin. Totals ranged up to 18 inches at Mellen. In the
western U.S., the record high of 69 degrees at Seattle WA was their
twenty-fifth of the year, their highest number of record highs for any
given year. Bakersfield CA reported a record 146 days in a row with daily
highs 80 degrees or above. (The National Weather Summary) (Storm Data)
...1988...
Unseasonably warm weather continued in the western U.S. In California,
afternoon highs of 96 degrees at Redding and Red Bluff were records for the
date. (The National Weather Summary)
...1989...
Forty-nine cities reported record low temperatures for the date as readings
dipped into the 20s and 30s across much of the south central and
southeastern U.S. Lows of 32 degrees at Lake Charles LA and 42 degrees at
Lakeland FL were records for October, and Little Rock AR reported their
earliest freeze of record. Snow blanketed the higher elevations of Georgia
and the Carolinas. Melbourne FL dipped to 47 degrees shortly before
midnight to surpass the record low established that morning. Showers and
thunderstorms brought heavy rain to parts of the northeastern U.S. Autumn
leaves on the ground clogged drains and ditches causing flooding. Up to
4.10 inches of rain soaked southern Vermont in three days. Flood waters
washed 600 feet of railroad track, resulting in a train derailment. (The
National Weather Summary)(Storm Data)


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