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Jefferson Davis Parish, LA Weather and Climate Synopsis

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National Weather Service Shreveport LA
452 AM CST Sun Dec 17 2017

.DISCUSSION...
One to two inches of needed rainfall occurred across the area last
night, with rainfall quickly exiting the area to the east by mid
morning. A very wet ground and easterly winds underneath a stg low
lvl inversion may result in a rather foggy morning for the Monday
am commute, with cloud cover being a possible limiting factor.  
Another strong and fast movg upper low will pull the frontal 
boundary responsible for this rain, back out of the gulf as a warm
front on Monday. Pcpn water values this time around will greatly 
exceed that with the system last night and very heavy rainfall 
possible where this front will stall out on Tuesday, most likely 
near or just north of the I-20 corridor. Expect some embedded
thunder as well with this widespread rainfall near and south of
this front. After a break in rainfall Wednesday into Thursday, a
strong upper low with plenty of cold air in its wake will come
barrelling towards the area. Instability will become unseasonally
high with LI values in the negative across southern portions of
area and deep convection possible Thu night into Friday. Models
seem a little more progressive and thus tapering off pops into the
early weekend from the nw, which will ease concerns about possible
winter wx for any of the cwa prior to Christmas Holiday. Although
a trailing short wave with mid lvl moisture could produce very lgt
amounts of winter pcpn, mainly north of I-30, feel that chances
and possible impacts not significant to place mention that far out
in extended period attm./07/

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

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Regional Hourly Observations For JEFFERSON DAVIS County

SWR not available
Current Temperatures, Dewpoint, RH, Wind, Surface 4-Panel
Current Agricultural Weather Conditions in Louisiana
Based on observations at 500am CST, Sunday December 17, 2017

Across Louisiana...temperatures are near 68 degrees south. Current sky condition is cloudy south. In the south, relative humidity is near 96%, and the dew point is near 67 degrees. Winds are unavailable north. Winds are unavailable central. Winds are coming from the southeast at 15 mph in the south, where conditions are not favorable for spraying due to strong winds. 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 68 degrees at N.O. INTL ARPT. The lowest temperature is 62 degrees at Baton Rouge.


NOWCAST For JEFFERSON DAVIS Parish: 0-6 Hour Forecast
Issued at 422 AM CST Sun Dec 17 2017

.NOW...
A line of showers extends from west of Lafayette into Vermilion
parish then southwest to beyond 60 miles south of Calcasieu Pass.
The line is moving to the east around 40 mph while individual 
cells lift to the northeast. The line is accompanied by a large 
area of light to moderate rain.

All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map


Hazardous Weather Outlook For JEFFERSON DAVIS 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 JEFFERSON DAVIS Parish, LA
524 AM CST Sun Dec 17 2017

TODAY
Warmer. Mostly cloudy. Chance of showers and slight chance of thunderstorms in the morning. Highs in the upper 60s. North winds up to 5 mph shifting to the east in the afternoon. Chance of precipitation 30 percent.

TONIGHT
Cloudy. Slight chance of showers and thunderstorms in the evening, then chance of showers and slight chance of thunderstorms after midnight. Lows in the upper 50s. Southeast winds up to 5 mph shifting to the northeast after midnight. Chance of precipitation 50 percent.

MONDAY
Cloudy. Showers and thunderstorms likely in the morning, then showers likely and chance of thunderstorms in the afternoon. Highs around 70. East winds up to 5 mph. Chance of precipitation 70 percent.

MONDAY NIGHT
Cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 60s. Southeast winds around 5 mph.

TUESDAY
Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the mid 70s. South winds 5 to 10 mph.

TUESDAY NIGHT
Mostly cloudy. Showers and thunderstorms likely in the evening, then chance of showers and thunderstorms after midnight. Lows around 60. Chance of precipitation 70 percent.

WEDNESDAY
Mostly sunny. Highs in the upper 60s.

WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 50s.

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

THURSDAY NIGHT
Mostly cloudy with chance of showers and slight chance of thunderstorms. Lows in the mid 50s. Chance of precipitation 50 percent.

FRIDAY
Showers and thunderstorms likely. Highs in the upper 60s. Chance of precipitation 70 percent.

FRIDAY NIGHT
Colder. Mostly cloudy with chance of showers and slight chance of thunderstorms. Lows in the mid 40s. Chance of precipitation 40 percent.

SATURDAY
Cooler. Mostly cloudy with a 40 percent chance of showers. Highs in the mid 50s.

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


JEFFERSON DAVIS 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 22-26    DEC 24-30    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        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