Today

Sunny. Highs in the upper 50s. North winds 10 to 15 mph.

Tonight

Clear. Areas of frost after midnight. Lows in the upper 20s. Northwest winds 5 mph.

Tomorrow

Areas of frost before 8 am. Otherwise, sunny, with a high near 65. Wind chill values as low as 27 early. Calm wind becoming west between 5 and 8 mph. 

Tomorrow Night

 Mostly clear, with a low around 34. West wind around 5 mph becoming calm. 

Hazardous Weather

High pressure over the gulf coast region will result in a dry and cooler air mass over the local area this weekend. Freezing temperatures are expected across much of southeast Georgia and inland northeast Florida tonight.

A freeze watch is in effect for much of inland northeast Florida tonight west of the Saint Johns River. A few locations across the Suwanee river valley may near hard freeze conditions for a brief period early Sunday morning. widespread to areas of frost are expected.

Forecast Details

A sheared upper level trough was pressing east while still digging across the eastern Continental United States . A thin band of cirrus was over the local county warning area on the south side of the southern stream jet. In the low levels, low pressure was tracking north northeast of the Carolina coast while a surface high pressure was centered over the gulf coast states. A lee side Appalachian trough was noted in the MSAS analysis and this feature could bring some gusty and cool northerly winds across our county warning area this afternoon as it moves east southeast over the Atlantic.

Local temperatures ranged from the low/mid 30s across our western Georgia zones this hour to low 40s along the Florida Atlantic coast. winds were light and west northwest 5 kts or less. most areas were calm. Given good radiational cooling conditions and very wet grounds, expect areas to widespread frost this morning across most inland areas.

Clear skies, cool temperatures and inland freezes are expected today through Monday as surface high pressure dominates to our west. Highs will moderate from the mid 50s/low 60s today to the low/mid 60s sun. since subsidence will be stronger over the area tonight and drier air more entrenched, leaned on the cooler side of guidance and under-cut slightly across our inland zones. This yields a more widespread freeze event for our inland Florida zones tonight and have therefore expanded the freeze watch for all our inland Florida zones less St. Johns and Flagler. Probability grids suggest about a 40-50% of a marginal hard freeze event across our Suwanee valley zones tonight. A this time durations of hard freeze temperatures seem too marginal for a hard freeze watch. Areas of frost are expected once again tonight.

Update

Large high pressure ridge dominates across the southern US from Texas to Florida with a broad middle/upper trough over the eastern US and middle/upper ridge in the western Continental US. dry and stable conditions today with 12z JAX sounding showing incredibly dry conditions with precipitable water of 0.08 inches. Sunny conditions with northwest to north winds around 10-15 miles per hour expected today. Highs forecast to reach the upper 50s to near 60. No changes to the forecast other than to remove freeze warning for inland northeast Florida counties this morning. A freeze watch remains in effect for most of northeast Florida tonight as clear skies and the cold air mass promote good radiational cooling with minimums from middle 20s to near 30.

Today's Pollen Levels: 6.3 Medium(on a scale to 12); Predominate Pollen: Juniper.

... Red Flag Warning Remains In Effect From 10 AM This Morning To 7 PM EST This Evening...
... Fire Weather Watch Now In Effect From Late Sunday Morning Through Early Sunday Evening... 

The Fire Weather Watch is now in effect from late Sunday morning through early Sunday evening. A red flag warning remains in effect from 10 am this morning to 7 PM EST this evening.

Today, much drier air mass settling over the region will allow minimum relative humidity values to bottom out in the 20 to 25 % range this afternoon. Relative humidity values are expected to drop below 35 % for a duration of 6 to 8 hours.

Northwest winds will increase to 10 to 15 mph with occasional gusts up to 20 mph at times.
Sunday, dry air mass over the region will allow minimum relative humidity values to bottom out around 25 % Sunday afternoon. Relative humidity values are expected to drop below 35 % for a duration of 5 to 7 hours.

... Freeze Watch Remains In Effect From Late Tonight Through Sunday Morning... 

A freeze watch remains in effect from late tonight through Sunday morning. 

Sub-freezing temperatures are expected for 5 to 7 hours tonight with minimum values in the upper 20s. Areas of frost are expected.

For additional information visit the National Weather Service in Jacksonville website on the internet at http://www.srh.noaa.gov/jax/