❄️ 2026–27 Winter Outlook is live — Above-normal snow season for the Mid-Atlantic. Read the full outlook →

🎉 JWM Picks

Nerd HQ

Jay Wintry Mix's hand-picked weather tools and sites — plus the Does the Pattern Support the White Stuff? checker for your exact location.

Does the Pattern Support the White Stuff? Browse Jay's Links
Mid-Atlantic Snow Tool

Does the Pattern Support the White Stuff?

Plug in the current teleconnection values and I'll score your Mid-Atlantic snow potential. Negative AO, negative NAO, negative EPO — you know the drill.

Live Teleconnection Indices · NOAA CPC
Fetching…
AO
—
Loading
NAO
—
Loading
EPO
—
Loading
PNA
—
Loading
MJO
—
Loading

↑ Sliders auto-filled with today's values. Adjust if using a forecast period, then hit Calculate.

AO
Arctic Oscillation
0.0
−4 (Cold!)0+4 (Mild)
NAO
North Atlantic Oscillation
0.0
−4 (Blocking!)0+4 (No block)
EPO
Eastern Pacific Oscillation
0.0
−4 (West ridge!)0+4 (West trough)
PNA
Pacific North American Pattern
0.0
−4 (Mild East)0+4 (Cold East!)
MJO — Madden-Julian Oscillation
Select the active phase · Phases 8, 1, 2 favor Mid-Atlantic snow
Amplitude: 1.0
0 (Weak/no MJO)1.0 (Active)3.0 (Strong!)
MJO Phase Geographic Reference
MJO Phase Reference Map
Phases 8, 1, 2 — favor Mid-Atlantic snow
Other phases
0
/ 100
❄️
—
—
Where to find current values
NOAA CPC — AO & NAO daily index NOAA CPC — PNA & EPO index NOAA CPC — MJO monitoring
Know Your Counties

Which County Are You In?

You'd be surprised how many people don't know. Hover over the map to identify your county — it matters when I say "Loudoun vs. Fairfax" in a forecast.

Virginia
Maryland
DC