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St. Landry Parish, LA Weather and Climate Synopsis

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


National Weather Service Shreveport LA
1146 PM CST Sun Dec 17 2017

.AVIATION...
LIFR cigs with reduced vsbys in FG (some of it dense) will 
continue areawide through much of Monday morning, before a slow
improvement commences by late morning/midday. However, as was the
case today, not expecting vsbys to improve much, possibly in the
3-6SM range with IFR/LIFR cigs lingering through the afternoon.
Can't rule out isolated -SHRA developing during the afternoon over
E TX/Wrn LA, and over the remainder of the region during the
evening, but low confidence precludes VCSH mention in the TAF's
attm. As low level winds become more SE Monday evening atop a very
moist and cool ground, should see cigs lowering to LIFR once again
after 00Z, with areas of FG developing over much of the region as
a warm front begins to advance NNW into E TX/N LA from SE TX/S LA.
Lt/Vrb winds will continue tonight through much of Monday. /15/

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

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Regional Hourly Observations For ST. LANDRY County

SWR not available
Current Temperatures, Dewpoint, RH, Wind, Surface 4-Panel
Current Agricultural Weather Conditions in Louisiana
Based on observations at 1200am CST, Monday December 18, 2017

Across Louisiana...temperatures are near 65 degrees south. Current sky condition is cloudy south. In the south, relative humidity is near 100%, and the dew point is near 65 degrees. Winds are unavailable north. Winds are unavailable central. Winds are coming from the south at 8 mph in the south, where conditions are favorable for spraying. The livestock cold stress index is in the unavailable category north, unavailable category central, and no stress category south. Based on current available observations, the highest temperature is 66 degrees at New Orleans Lakefront. The lowest temperature is 62 degrees at Baton Rouge.


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. LANDRY County, LA

528 AM CST Sun Dec 17 2017

 DAY ONE  Today and Tonight
Widespread showers with a few embedded thunderstorms will continue
to progress to the east and will come to an end by this afternoon.
Periods of heavy rain may occur during the morning that could lead
to minor nuisance flooding along secondary roadways.

 DAYS TWO THROUGH SEVEN  Monday through Saturday
The cold front that moved through this morning will lift back to
the north as a warm front providing a focus for another round of
widespread showers and thunderstorms. These storms will also have
the potential to produce periods of heavy rain which could cause
minor nuisance flooding along secondary roadways. This rain will
continue into Tuesday night before another cold front sweeps
through the area bringing the precipitation to an end.

Another upper low and associated cold front will approach the area
late Thursday night into Friday bringing another round of showers
and thunderstorms that will continue into Sunday morning.

 SPOTTER INFORMATION STATEMENT  
Spotter activation is not anticipated.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For ST. LANDRY Parish, LA
950 PM CST Sun Dec 17 2017


DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST MONDAY

REST OF TONIGHT
Cloudy. Areas of dense fog through the night. A 40 percent chance of showers and thunderstorms after midnight. Lows in the upper 50s. North winds up to 5 mph.

MONDAY
Areas of dense fog in the morning. Showers and thunderstorms likely in the morning, then showers likely and slight chance of thunderstorms in the afternoon. Highs in the upper 60s. East winds up to 5 mph. Chance of precipitation 70 percent.

MONDAY NIGHT
Cloudy with a 20 percent chance of showers and thunderstorms. Areas of fog after midnight. Lows in the lower 60s. Southeast winds around 5 mph.

TUESDAY
Cloudy. Slight chance of showers and thunderstorms in the morning, then chance of showers and slight chance of thunderstorms in the afternoon. Highs in the mid 70s. South winds 5 to 10 mph. Chance of precipitation 40 percent.

TUESDAY NIGHT
Mostly cloudy. Chance of showers and slight chance of thunderstorms in the evening, then showers likely and slight chance of thunderstorms after midnight. Lows in the lower 60s. Southwest winds 10 to 15 mph. Chance of precipitation 60 percent.

WEDNESDAY
Mostly sunny with a 20 percent chance of showers. Highs in the lower 70s.

WEDNESDAY NIGHT
Cooler. Mostly clear. Lows around 50.

THURSDAY
Mostly sunny. Highs in the lower 70s.

THURSDAY NIGHT
Mostly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 50s.

FRIDAY
Mostly cloudy with chance of showers and slight chance of thunderstorms. Highs in the lower 70s. Chance of precipitation 40 percent.

FRIDAY NIGHT
Showers likely and slight chance of thunderstorms. Lows around 50. Chance of precipitation 60 percent.

SATURDAY
Cooler. Cloudy with a 40 percent chance of showers. Highs in the upper 50s.

SATURDAY NIGHT
Cloudy with a 20 percent chance of showers. Lows in the upper 40s.

SUNDAY
Mostly cloudy with a 30 percent chance of showers. Highs in the lower 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


ST. LANDRY 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

Monday December 18, 2017 the 352th Day of Year

---------------------------------------------------
SUN
Declination -23.410000
Distance 0.999725 AU
Rise 08:03 EST Set 18:07 EST
Transit Meridian 13:05 EST
Civil Twilight Begins 07:37 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 18TH
HISTORIC WEATHER EVENTS
...1957...
A tornado swept across Jackson County, Williamson County and Franklin
County in southern Illinois killing eleven persons. (David Ludlum)
...1981...
A heavy lake-effect snow blanketed the southern and southeast shores of
Lake Michigan leaving up to 22 inches of snow at Valparaiso IND. (David
Ludlum)
...1983...
Record cold hit the north central states. At Havre MT the mercury plunged
to a record reading of 34 degrees below zero. (Sandra and TI Richard
Sanders - 1987)
...1984...
A storm over southern California left up to 16 inches of snow in the
mountains and upper deserts, with 13 inches reported at Lancaster. Edwards
Air Force Base was closed, and Interstate 5 was closed from Castaic to the
Tehachapis Mountains. (18th-19th) (The Weather Channel)
...1986...
A strong winter storm, which developed off the coast of New Jersey and
moved out to sea, lashed the northeastern U.S. with high winds, heavy rain,
and heavy snow. The storm left snowfall amounts of up to 30 inches in
Vermont, 24 inches in Massachusetts, and 20 inches in New Hampshire. The
highest rainfall amounts approached four inches in southern New England,
where winds gusted to 70 mph. (Storm Data)
...1987...
A weakening storm moved into the Rocky Mountain Region producing six inches
of snow at the Platoro Reservoir in the San Juan Mountains of Colorado. The
storm then spread rain and drizzle across the Southern High Plains into the
Middle Mississippi Valley, with thunderstorms over Texas. (Storm Data) (The
National Weather Summary)
...1988...
Warm weather prevailed in the central U.S. while cool weather prevailed
across the eastern states. Sheridan WY, with a record warm afternoon high
of 68 degrees, was seven degrees warmer than Key West FL. (The National
Weather Summary)
...1989...
A winter storm moving out of the Great Plains Region spread freezing rain,
sleet and snow across parts of the southeastern U.S. Freezing rain resulted
in 170 auto accidents in the Memphis area during the evening hours.
Unseasonably warm weather continued ahead of arctic cold front. Miami FL
equalled their record for December with an afternoon high of 87 degrees.
(Storm Data) (The National Weather Summary)

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