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Sebastian County, AR Weather and Climate Synopsis

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Weather Summary for Arkansas
National Weather Service Little Rock AR
925 PM CDT Thu Jul 19 2018

Another hot day was seen across the Natural State as quite a few
locations topped 100 degrees with most locations seeing heat index
values well over 100 degrees. This evening a strong line of
showers and thunderstorms moved into northern Arkansas. This line
of storms originated in Kansas and continued to push south through
Missouri before making its way into northern Arkansas before
sunset. This storm produced strong winds and knocked down trees
and power lines across northern portions of the state. This storm
system will continue to weaken through the evening and overnight
hours tonight.

In the coming days, high pressure aloft is forecast to strengthen 
over the region. This will result in diminishing rain chances for 
most areas, along with hotter temperatures. Highs Friday, will 
range from the mid 90s to around 103 degrees. 

Afternoon heat index values will range from 105 to 110 degrees in 
many areas Friday afternoon, with Heat Advisories already posted 
for part of Arkansas. Remember to drink plenty of water, stay in 
an air-conditioned room if possible, stay out of the sun, and 
check up on relatives, neighbors and pets.

 

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Regional Hourly Observations For SEBASTIAN County
700 PM CDT FRI JUL 20 2018


NORTHWEST ARKANSAS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
FAYETTEVILLE   SUNNY     95  70  44 N3        29.89R HX 101           
6HR MIN TEMP:  95; 6HR MAX TEMP: 100;                                

FORT SMITH     SUNNY    106  62  23 W9        29.78R HX 108           
6HR MIN TEMP: 100; 6HR MAX TEMP: 108;                                

HARRISON       SUNNY     92  72  51 N8        29.92R HX  99           
6HR MIN TEMP:  88; 6HR MAX TEMP:  96; 6HR PCP:  0.01;                

BENTONVILLE    SUNNY     93  74  53 NE15      29.93R HX 103           
6HR MIN TEMP:  93; 6HR MAX TEMP:  99;                                

ROGERS         SUNNY     93  72  50 NE15G23   29.94R HX 101           
6HR MIN TEMP:  93; 6HR MAX TEMP:  99;                                

SILOAM SPGS    SUNNY     96  72  45 NE5       29.90R HX 104           
6HR MIN TEMP:  96; 6HR MAX TEMP: 101;                                

HIGHFILL       SUNNY     95  73  49 NE10      29.91R HX 105           
SPRINGDALE     SUNNY     93  73  52 NE12      29.92R HX 102           

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


Current Agricultural Weather Conditions in Arkansas
Based on observations at 700pm CDT, Friday July 20, 2018

Across Arkansas...temperatures are near 92 degrees north, near 95 degrees central, and near 101 degrees south. Current sky conditions are sunny north, mostly sunny central, and fair south. In the north, relative humidity is near 57%, and the dew point is near 75 degrees. The heat index is near 103 degrees north. In the central part of the state, relative humidity is near 58%, and the dew point is near 78 degrees. The heat index is near 111 degrees central. In the south, relative humidity is near 32%, and the dew point is near 67 degrees. The heat index is near 106 degrees south. The livestock heat stress category is emergency north, emergency central, and emergency south. Conditions are hazy south. Winds are calm north, where conditions are favorable for spraying. Winds are from the south at 12 mph central, where conditions are favorable for spraying. Winds are from the southwest at 8 mph south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 106 degrees at Fort Smith. The lowest temperature is 36 degrees at Mount Ida.


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

US Radar, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For SEBASTIAN County,AR

512 PM CDT Fri Jul 20 2018

   Dangerous Heat Through Early Evening and Continuing into Saturday  

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

 DAY ONE  Today and Tonight.

DANGEROUS HEAT.
RISK  Significant.
AREA  All of eastern Oklahoma and northwest Arkansas. 
ONSET  Ongoing through the evening.

SEVERE THUNDERSTORM.
RISK  Limited.
AREA  Far northeast Oklahoma and far northwest Arkansas.
ONSET  Evening. 

DISCUSSION  
Dangerous heat will continue through the early evening hours.
Temperatures have peaked in the upper 90s to 109 degrees and will
slowly fall. Heat index values of 105 to 112 degrees will remain
possible into the evening. 

Scattered thunderstorms developing across southern Kansas will
move east toward northern Oklahoma late this evening and
overnight. Locally damaging wind gusts will be possible with the
strongest of this activity if it can survive into northeast
Oklahoma and northwest Arkansas before weakening. 

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT  
Local Spotter Activation May Be Needed.

 DAYS TWO THROUGH SEVEN  Saturday through Thursday.
SATURDAY and Sunday  Dangerous Heat Potential. 
MONDAY through Wednesday  No Hazards. 
THURSDAY  Thunderstorm Potential.

EXTENDED DISCUSSION  
A weak cold front will move south through eastern Oklahoma over
the weekend gradually bringing an end to the prolonged excessive 
heat. Heat index values, however, will remain dangerously high 
across the lower Arkansas River Valley and far southeast Oklahoma 
Saturday and Sunday before drier and cooler air finally takes over.

weather.gov/tulsa contains additional information.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For SEBASTIAN County, Arkansas
340 PM CDT Fri Jul 20 2018


EXCESSIVE HEAT WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING


HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT SATURDAY

TONIGHT
Partly cloudy. A 20 percent chance of showers and thunderstorms after midnight. Lows in the upper 70s. Southwest winds up to 10 mph in the evening becoming light. Heat index readings 100 to 108 in the evening.

SATURDAY
Mostly sunny. Highs in the upper 90s. Light winds becoming north around 10 mph in the afternoon. Heat index readings 100 to 106.

SATURDAY NIGHT
Mostly clear. Lows in the lower 70s. North winds around 10 mph in the evening becoming light.

SUNDAY
Mostly sunny. Highs in the mid 90s. Light winds becoming northwest around 10 mph in the afternoon.

SUNDAY NIGHT
Partly cloudy. Lows in the lower 70s. Light winds.

MONDAY
Partly cloudy. Highs in the mid 90s.

MONDAY NIGHT
Partly cloudy. Lows in the lower 70s.

TUESDAY
Mostly sunny. Highs in the mid 90s.

TUESDAY NIGHT
Clear. Lows in the lower 70s.

WEDNESDAY
Sunny. Highs in the mid 90s.

WEDNESDAY NIGHT
Mostly clear. Lows in the lower 70s.

THURSDAY
Mostly sunny. Highs in the mid 90s.

THURSDAY NIGHT
Partly cloudy. Lows in the mid 70s.

FRIDAY
Partly cloudy. Highs in the mid 90s.

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


Medium & Long Range Outlook For Arkansas
                             ARKANSAS                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   JUL 26-30 JUL 28-AUG 3    JUL       JUL-SEP                      
                 -----------  -----------  --------  ---------
   Temperature:     Normal       Normal      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

Friday July 20, 2018 the 201th Day of Year

---------------------------------------------------
SUN
Declination 20.470000
Distance 0.999716 AU
Rise 07:11 EDT Set 21:20 EDT
Transit Meridian 14:15 EDT
Civil Twilight Begins 06:43 EDT Ends 21:47 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

////////////////////////
JULY 20TH...HISTORIC WEATHER EVENTS
...1930...
The temperature at Washington D.C. soared to an all-time record of 106
degrees. The next day Millsboro reached 110 degrees to set a record for the
state of Delaware. July 1930 was one of the hottest and driest summers in
the U.S., particularly in the Missouri Valley where severe drought
conditions developed. Toward the end of the month state records were set
for Kentucky with 114 degrees, and Mississippi with 115 degrees. (David
Ludlum)
...1934...
The temperature at Keokuk IA soared to 118 degrees to establish a state
record. (The Weather Channel)
...1953...
Twenty-two inches of hail reportedly fell northeast of Dickinson ND. (The
Weather Channel)
...1986...
The temperature at Charleston SC hit 104 degrees for the second day in a
row to tie their all-time record high. (The Weather Channel)
...1987...
Thunderstorms produced severe weather across Minnesota, Wisconsin and
Michigan. Thunderstorms produced wind gusts to 87 mph at Mosinee WI, and
strong thunderstorm winds capsized twenty-six boats on Grand Traverse Bay
drowning two women. Thunderstorms produced nine inches of rain at Shakopee
MN, with 7.83 inches reported in six hours at Chaska MN. Thunderstorms in
north central Nebraska produced hail as large as golf balls in southwestern
Cherry County, which accumulated to a depth of 12 inches. (The National
Weather Summary) (Storm Data)
...1988...
The temperature at Redding CA soared to an all-time record high of 118
degrees. Showers and thunderstorms produced much needed rains from New
England to southern Texas. Salem IN was deluged with 7.2 inches of rain
resulting in flash flooding. (The National Weather Summary)
...1989...
Showers and thunderstorms in the Middle Atlantic Coast Region soaked
Wilmington DE with 2.28 inches of rain, pushing their total for the period
May through July past the previous record of 22.43 inches. Heavy rain over
that three month period virtually wiped out a 16.82 inch deficit which had
been building since drought conditions began in 1985. Thunderstorms in
central Indiana deluged Lebanon with 6.50 inches of rain in twelve hours,
and thunderstorms over Florida produced wind gusts to 84 mph at Flagler
Beach. (The National Weather Summary) (Storm Data)

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