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Polk 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 POLK County
500 AM CDT FRI JUL 20 2018


WEST CENTRAL ARKANSAS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MENA           CLOUDY    88  68  51 SW3       29.90R HX  91           
MOUNT IDA      CLOUDY    81  74  79 VRB3      29.84S HX  86           

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


Current Agricultural Weather Conditions in Arkansas
Based on observations at 400am CDT, Friday July 20, 2018

Across Arkansas...temperatures are near 69 degrees north, near 80 degrees central, and near 81 degrees south. Current sky conditions are partly cloudy north, cloudy central, and fair south. In the north, relative humidity is near 96%, and the dew point is near 68 degrees. In the central part of the state, relative humidity is near 100%, and the dew point is near 80 degrees. The heat index is near 89 degrees central. In the south, relative humidity is near 79%, and the dew point is near 74 degrees. The heat index is near 86 degrees south. The livestock heat stress category is no stress north, danger central, and no stress south. Winds are from the east at 3 mph north, where conditions are favorable for spraying. Winds are from the south at 5 mph central, where conditions are favorable for spraying. Winds are from the southwest at 5 mph south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 88 degrees at Mena. The lowest temperature is 68 degrees at Flippin.


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 POLK County,AR

500 AM CDT Fri Jul 20 2018

 DAY ONE  Today and Tonight

Dangerous heat is expected this afternoon and early evening. An
excessive heat warning is in effect this afternoon and evening in
central and south sections. A heat advisory is in effect in the
north. Heat index values up to 114 degrees are anticipated this
afternoon. 

Also, a cold front will enter north Arkansas this evening and 
severe thunderstorms will be possible along and ahead of the cold 
front. Damaging winds will be the main threat. 

 DAYS TWO THROUGH SEVEN  Saturday Through Thursday

The chance for thunderstorms will diminish over the weekend. 
Only an isolated strong to severe thunderstorm chance will return
for Tuesday through Thursday. 

Heat index values will remain a concern through much of the 
period as well. Most locations will see heat index values in the 
upper 90s to around 105 degrees. Some areas may see heat index 
values exceed 105 degrees during the afternoon and evening hours.

 Spotter Information Statement  

Spotter activation is not anticipated.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For POLK County, Arkansas
400 AM CDT Fri Jul 20 2018


EXCESSIVE HEAT WARNING IN EFFECT FROM NOON TODAY TO 9 PM CDT THIS EVENING

TODAY
Mostly cloudy early in the morning
becoming mostly sunny in the morning
Then
becoming sunny in the afternoon. A slight chance of showers and thunderstorms early in the morning. Highs around 103. Southwest winds 5 mph early in the morning
increasing to 5 to 10 mph in the afternoon. The chance of precipitation 20 percent. Average rainfall less than 1/10 inch.

TONIGHT
Partly cloudy. Lows in the upper 70s. Southwest winds 5 mph.

SATURDAY
Mostly sunny. Highs around 100. Northwest winds 5 mph.

SATURDAY NIGHT
Mostly clear. Lows in the lower 70s. North winds 5 mph.

SUNDAY
Sunny. Highs in the upper 90s. Northeast winds 5 mph in the morning
becoming northwest in the afternoon.

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

MONDAY
Mostly sunny. Highs in the mid 90s.

MONDAY NIGHT
Partly cloudy. Lows in the upper 60s.

TUESDAY
Sunny. Highs in the lower 90s.

TUESDAY NIGHT
Mostly clear. Lows around 70.

WEDNESDAY
Sunny. Highs in the mid 90s.

WEDNESDAY NIGHT
Mostly clear. Lows around 70.

THURSDAY
Sunny. 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 25-29 JUL 27-AUG 2    JUL       JUL-SEP                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below      Above      Above                      
 Precipitation:     Normal        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