Grid JF21 Band Conditions
Localized HF conditions for Maidenhead locator JF21. Coordinating at -38.50°, 5.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
JF21 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.
From the JF21 operating area, work the 06:51 UTC and 16:43 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses JF21.
Night operation should keep 20m on watch and move to 40m as the path darkens.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- mid-latitude
- Local phase
- Darkness
- Aurora exposure
- low at this latitude
- Grayline
- 06:51 UTC / 16:43 UTC
- Best high band
- 10m
- Nearest city
- the JF21 operating area
● Local Band Quality Scorings
Use this local score for JF21, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from JF21 — the JF21 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from JF21 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| Southern Africa | 1,495 mi | 61° | 40m, 80m, 20m | Open now |
| South America | 4,126 mi | 275° | 40m, 20m, 80m | Open now |
| Europe | 6,122 mi | 3° | 10m, 15m, 20m | Open now |
| South Asia | 6,302 mi | 62° | 10m, 15m, 20m | Open now |
| Oceania | 7,194 mi | 149° | 10m, 15m, 20m | Open now |
| North America | 8,423 mi | 297° | 40m, 20m, 80m | Open now |
| East Asia / Japan | 9,874 mi | 79° | 10m, 15m, 20m | Open now |
● Band-by-Time Plan for JF21
A planning heuristic for the local day at JF21, built from sunrise 06:51 UTC, sunset 16:43 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching JF21 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in JF21, JF22, JF20, JF31, JF11. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
No contest event is currently loaded. For planning from JF21, start with 10m POOR, 15m POOR, 20m FAIR and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links