Weather BriefingWinter Weather Today - Wednesday

NWS Peachtree City, GeorgiaJanuary 28, 2014

Current Warnings/Advisories

Winter Weather Advisory

Winter Storm Warning

Ice Storm Warning

Overnight Changes:• Winter Storm Warning

expanded further north into Atlanta Metro

• Winter Weather Advisory for most of extreme north GA

Current Radar

Uncertainties – Dry Air at Surface

• As an example – here is the hourly weather graph for ATL– Other sites have similar temperature/dewpoint trends

• VERY dry air at the surface• Precipitation will not reach the ground until near-surface air is

saturated (RH around 80%)

Uncertainties – P-type Transition

• Shaded area starts as sleet/freezing rain

• Transition to snow sometime after midnight

Winter Storm Total Forecast Amounts

Freezing Rain Snow / Sleet

• Sleet will impact storm total snowfall. More sleet = lower snow amounts.

**Potential exists for bands of heavier snow to produce isolated amounts higher than shown**

Precipitation Type Expected

• Snow expected further north– Dry snow• High snow ratios• Not good for snowballs!

• Sleet and freezing rain expected across southeast sections

• Significant impacts will be felt from this storm system

Temperatures Today

Temperature - Noon Temperature – 8pm Temperature - Midnight

• Notice that high temperatures occur in the early morning.• Temperatures will be below freezing area wide by evening when

precipitation is ongoing.

Temperatures – Tonight through Thursday

Lows Tonight Wednesday Highs Lows Thursday AM

• Hard Freeze Wednesday and Thursday mornings• Temperatures rebounding to slightly above freezing Wednesday afternoon• Where sun comes out, some melting on roads will occur, but it will refreeze overnight.

As If That Wasn’t Enough:Dangerous Wind Chills

Summary

• Significant travel problems across much of central and north Georgia– Caution strongly advised for this afternoon rush hour– Snow will have begin sticking by then– Leave work early if you can to avoid the rush + wintry precip

combination!!!!• Heaviest snowfall amounts continue to appear likely in a

SW to NE band in the area between Macon and Atlanta Metro.

• Southeast portion of the area can expect significant icing from freezing rain – will likely led to some power outages