87B Runway 15/33 — Portage Lake Municipal Seaplane Base
5,000 × 500 ft water · true headings 150° / 000° · field elevation 608 ft
Runway 15/33 at Portage Lake Municipal Seaplane Base (87B) in Portage Lake, ME is 5,000 ft long and 500 ft wide, water, with true headings 150° and 000°. 87B has no digital ATIS, so the active runway is not known; the wind-favored end and the ATIS Alerts prediction are estimates.
Runway 15/33 — current operational status
What the D-ATIS, the tower and current NOTAMs state now. The published FAA baseline (NASR) is a separate line in the overview below and does not reflect temporary closures.
- No received NOTAM closes or restricts this runway, but the NOTAM stream has no complete initial load and the airport has no tower or D-ATIS feed. No current closure information.
Sources: Published FAA baseline (OurAirports/NASR record) · FAA NOTAMs. Runway NOTAMs stream live from the FAA NOTAM Management Service (SWIM); the official text is shown verbatim below the card. Always confirm with a current briefing.
No received NOTAM currently names runway 15/33 at 87B. NOTAMs are received live from the FAA NOTAM Management Service through SWIM and recorded since Sep 19, 2026; a NOTAM issued before that and not re-issued since may be missing. Get a full briefing before flight.
Current runway assignment is not available from D-ATIS at 87B. The wind components below show which end the wind favors; the section after it is an ATIS Alerts prediction. Neither is an ATC assignment.
Current wind on Runway 15/33
Wind from the south-southwest (210°) at 6 kt · from KPQI, the nearest reporting station
- Headwind
- 3 kt
- Crosswind
- 5 ktfrom right
- Tailwind
- 5 kt
- Crosswind
- 3 ktfrom left
Wind-favored runway at 87B right now: 20 (6 kt headwind) — a different runway than this one.
Components use TRUE runway headings and TRUE METAR wind. “Favored by wind” is arithmetic, not an ATC assignment.
Runway 15/33 outlook
Where runway 15/33 stands now and which runway at 87B is likely over the next 12 hours — an estimate, not an ATC assignment.
Time · runway 15/33 · airport-wide outlook · confidence · forecast wind · why
- Now2238Z · 6:38 PM EDT·15/33: not favored·airport-wide likely 20 then 15·6 kt headwind, 1 kt crosswind·Medium 74%·wind 210° at 6 kt·Why Current METAR wind 210° at 6 kt favors southwest-facing runway ends: 6 kt headwind and 1 kt crosswind on 20 versus 3 kt headwind on 15.|No known runway closure prevents this configuration.
- +1 h2338Z · 7:38 PM EDT·15/33: not favored·airport-wide likely 20 then 15·5 kt headwind, 6 kt crosswind·High 89%·wind 250° at 8 kt·Why TAF forecast wind 250° at 8 kt favors west-facing runway ends: 5 kt headwind and 6 kt crosswind on 20 versus -1 kt headwind on 15.|No known runway closure prevents this configuration.|Confidence falls with forecast distance (+1 h).
- +2 h0038Z · 8:38 PM EDT·15/33: not favored·airport-wide likely 20 then 15·5 kt headwind, 6 kt crosswind·High 86%·wind 250° at 8 kt·Why TAF forecast wind 250° at 8 kt favors west-facing runway ends: 5 kt headwind and 6 kt crosswind on 20 versus -1 kt headwind on 15.|No known runway closure prevents this configuration.|Confidence falls with forecast distance (+2 h).
- +3 h0138Z · 9:38 PM EDT·15/33: not favored·airport-wide likely 20 then 15·5 kt headwind, 6 kt crosswind·High 83%·wind 250° at 8 kt·Why TAF forecast wind 250° at 8 kt favors west-facing runway ends: 5 kt headwind and 6 kt crosswind on 20 versus -1 kt headwind on 15.|No known runway closure prevents this configuration.|Confidence falls with forecast distance (+3 h).
- +6 h0438Z · 12:38 AM EDT·15/33: not favored·airport-wide likely 20 then 15·5 kt headwind, 6 kt crosswind·Medium 74%·wind 250° at 8 kt·Why TAF forecast wind 250° at 8 kt favors west-facing runway ends: 5 kt headwind and 6 kt crosswind on 20 versus -1 kt headwind on 15.|No known runway closure prevents this configuration.|Confidence falls with forecast distance (+6 h).
- +12 h1038Z · 6:38 AM EDT·15/33: not favored·airport-wide likely 20 then 15·5 kt headwind, 6 kt crosswind·Low 56%·wind 250° at 8 kt·Why TAF forecast wind 250° at 8 kt favors west-facing runway ends: 5 kt headwind and 6 kt crosswind on 20 versus -1 kt headwind on 15.|No known runway closure prevents this configuration.|Confidence falls with forecast distance (+12 h).
ATIS Alerts Predicted Runway is an estimate from the TAF wind forecast, runway geometry (most headwind, crosswind penalised, tailwind over 5 kt avoided, longest runway breaks ties), the current stated configuration and any stated closures. Each row lists its reasons; “no runway favored” is a genuine answer under variable or light wind, never replaced by a guess. It is not an ATC assignment and does not know about noise abatement or traffic flow unless the recorded history shows them. TAF issued 1729Z (1:29 PM EDT).
Runway 15/33 equipment and lighting
What the FAA record lists for each end, annotated with current NOTAM and D-ATIS outages.
The FAA NASR runway record does not carry this airport, so no equipment can be listed. Nothing is inferred.
- Approach lighting
- Not available
- Visual glide slope
- Not available
- Runway edge lighting
- Not available
- Centerline lighting
- Not available
- Touchdown zone lighting
- Not available
- REIL
- Not available
- ILS
- Not available
- Localizer
- Not available
- Glideslope
- Not available
- DME
- Not available
- Marker beacons
- Not available
- RVR
- Not available
- Runway markings
- Not available
- Arresting system
- Not available
- Approach lighting
- Not available
- Visual glide slope
- Not available
- Runway edge lighting
- Not available
- Centerline lighting
- Not available
- Touchdown zone lighting
- Not available
- REIL
- Not available
- ILS
- Not available
- Localizer
- Not available
- Glideslope
- Not available
- DME
- Not available
- Marker beacons
- Not available
- RVR
- Not available
- Runway markings
- Not available
- Arresting system
- Not available
Source: FAA NASR 28-day subscription (equipment on record) · FAA NOTAMs via SWIM (live)and the current D-ATIS (outages). “Not available” means the FAA record lists no such equipment for the end; nothing here is inferred. An outage annotation is only ever a reading of the official text shown with it. Declared distances are not shown in this phase.
Land and hold short operations
LAHSO hold-short points and available landing distances on the FAA record, and whether the current D-ATIS reports LAHSO in effect.
No LAHSO hold-short point on the FAA record for this end.
No LAHSO hold-short point on the FAA record for this end.
This airport has no D-ATIS, so the current LAHSO state is not known here. Source: FAA NASR; D-ATIS text read by ATIS Alerts.
Frequencies for runway 15/33
Tower, ground, clearance, ATIS and approach frequencies from the FAA record, labelled by what they apply to.
No tower, ground, ATIS or approach frequencies are on the FAA NASR record for 87B.
Runway 15/33 overview
Physical characteristics from the FAA-derived runway record.
- Length
- 5,000 ft
- Width
- 500 ft
- Surface
- Water
- Runway lights
- Not lighted
- Airport elevation
- 608 ft
- Published FAA baseline
- Open
- Published NASR record; does not reflect temporary closures or restrictions. Current operational status is the card at the top of the page.
- True heading
- 150°
- Magnetic (approx.)
- ≈ 166°
- Published FAA baseline
- Open
- True heading
- 000°
- Magnetic (approx.)
- ≈ 016°
- Published FAA baseline
- Open
Runway 15/33 numbers are magnetic; the stored geometry and every wind calculation on this page are TRUE north, so they never need a variation correction. Magnetic variation here is about 15.7°W (World Magnetic Model). This airport is not in the FAA NASR record, so surface condition, thresholds and traffic-pattern direction are omitted rather than guessed.
Wind-favored runway at 87B — last 30 days
Which runway end had the most headwind each hour, from ATIS Alerts' collected wind history — an estimate, not ATC use.
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 02/33
- 50%
- 20
- 39%
- 15
- 11%
Historical wind and crosswind on runway 15/33
20-year hourly climatology from the ASOS archive, computed per runway end.
Long-term wind statistics for runway 15/33 are not loaded yet. ATIS Alerts computes them from the 20-year ASOS archive for stations with continuous records; check back as coverage expands.
Runway 15/33 closure history
Kept per source with its provenance: D-ATIS-observed, NOTAM-observed and the FAA published baseline are never merged.
87B has no D-ATIS, so there is no broadcast-observed closure record.
No closure NOTAM naming runway 15/33 has been received since the stream went live.
Runway 15/33: Open on the published record — a baseline that does not reflect temporary closures or restrictions, not the current operational status.
Recent pilot reports involving runway 15/33
Official PIREPs that name this runway explicitly, past 6 hours.
No pilot report in the last 6 hours names runway 15/33 at 87B explicitly. Reports near the airport that do not name a runway are on the airport page.
Instrument approaches to runway 15/33
From the FAA d-TPP, linked to the official plates.
No published instrument approach procedures are listed for 87B in the current FAA d-TPP cycle. Visual approaches only.
Methodology and sources
Short version below; the full write-up is at Runway Intelligence methodology, and every launched airport is listed on the Runway Intelligence hub.
- Active runwayscome first from the tower's TFDM (Terminal Flight Data Manager) airport configuration, received as structured data through the FAA SWIM Cloud Distribution Service at towers that have it; otherwise from the airport's D-ATIS text (community relay of the FAA broadcast) with an open, tested parser, and the broadcast text is always shown. Every change is recorded, so “recorded use” is what the facility stated, never an inference. ATIS Alerts is not an FAA product and this is not FAA data; SWIM content is for non-operational use.
- Flowis the compass direction of the stated arrival ends (eight sectors, named only when every arrival end points within 30° of the others and clear of a sector edge); a tower's own configuration name is used when it carries a direction word. Stored separately from the runway sets.
- Equipment, LAHSO and frequencies come from the FAA NASR 28-day subscription: approach lights, visual glide slope, edge / centerline / touchdown-zone lights, REIL, ILS components with FAA status, RVR, markings, LAHSO hold-short points and available landing distances, and facility frequencies with their published sectorization. Outage annotations are readings of the NOTAM or D-ATIS text shown beside them. Blank FAA fields read “Not available”.
- Wind components use the current METAR (aviationweather.gov) against TRUE runway headings from the OurAirports/FAA runway record.
- Runway visual range, tower demand and traffic-management restrictions come from FAA SWIM: STDDS Airport Data (RVR and light settings, about 130 airports) and TFDM (15-minute runway demand, APREQ/MIT restrictions). Each block is stamped with its own time; none of it is an FAA product or a clearance.
- Predicted runway scores each open end from the TAF wind (headwind, crosswind penalty, tailwind avoidance, longest-runway tie-break), excludes stated closures, and — once a wind sector has 24 h of recorded use — adjusts confidence by what the facility did under similar wind; every row lists its reasons. It does not model noise abatement or flow programs beyond what the record shows.
- History thresholds: usage shares need 12 / 48 / 168 recorded hours for the 24-hour / 7-day / 30-day windows; a wind sector needs 24 h and 5 days; time-of-day needs 7 days and 20 h per daypart; flow shares need 48 h. Below a bar the module says so instead of showing a percentage.
- Climatology: Iowa Environmental Mesonet ASOS archive, one observation per hour, 45° wind sectors, percentiles via t-digest; runway geometry is today's record applied to all years. Methodology v1.
- PIREPs: official reports from aviationweather.gov are attached only when the text names this runway and the report is tied to 87B by identifier or by position within 15 NM. Approaches: FAA d-TPP metafile, current charting cycle; plates link to aeronav.faa.gov. No minimums are reproduced.
- Data freshness: METAR and D-ATIS refresh every minute on this page; the D-ATIS recorder ran 2 min ago; usage rollups every 3 h; climatology through the archive end.
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⚠️ ATIS Alerts provides informational runway analysis based on available weather, the tower's TFDM configuration and NOTAMs received through FAA SWIM, D-ATIS text, FAA data and historical observations. Active runways shown here are what the tower or its D-ATIS stated and may lag or be misread; NOTAM coverage is not complete; predicted runways are an ATIS Alerts estimate, not an ATC assignment; equipment states are readings of the official text shown with them. Not an FAA product. Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.