Grid CR91 Band Conditions
Localized HF conditions for Maidenhead locator CR91. Coordinating at 81.50°, -121.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
CR91 conditions are FAIR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 137.
From the CR91 operating area, work the no sunrise — polar day and no sunset — polar day grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses CR91.
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
- high-latitude
- Local phase
- Darkness
- Aurora exposure
- watch during geomagnetic storms
- Grayline
- no sunrise — polar day / no sunset — polar day
- Best high band
- 10m
- Nearest city
- the CR91 operating area
● Local Band Quality Scorings
Use this local score for CR91, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from CR91 — the CR91 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from CR91 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 |
|---|---|---|---|---|
| North America | 2,990 mi | 154° | 10m, 15m, 20m | Open now |
| Europe | 3,175 mi | 42° | 40m, 20m, 80m | Open now |
| East Asia / Japan | 3,873 mi | 287° | 10m, 15m, 20m | Open now |
| South Asia | 5,255 mi | 342° | 10m, 15m, 20m | Open now |
| South America | 6,980 mi | 119° | 40m, 20m, 80m | Open now |
| Oceania | 8,256 mi | 264° | 10m, 15m, 20m | Open now |
| Southern Africa | 8,500 mi | 36° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for CR91
A planning heuristic for the local day at CR91, built from sunrise no sunrise — polar day, sunset no sunset — polar day, 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 CR91 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in CR91, CR92, CR90, DR01, CR81. 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 CR91, 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