Larson's Seaplane Base (MA74) Area Aviation Weather & Runway Winds
Aviation weather near Larson's Seaplane Base in Tyngsboro, MA, decoded from the nearest reporting station (KASH) — conditions, runway crosswinds, and free Telegram airport alerts.
Larson's Seaplane Base (MA74) is a seaplane base in Tyngsboro, MA. MA74 has no weather station of its own — conditions here are decoded from KASH, about 7 nm away, the nearest reporting station, and local conditions can differ. Its 2 runways (13W, 31W) — longest 2,500 ft — are checked against the current wind in the crosswind table below. The nearest TAF is issued for KBED. Track it in the ATIS Alerts Telegram bot to get alerts read from KASH, the station this page is based on.
No weather station at this airport — showing the nearest station KASH, 6.9 nm away.
Wind from the southeast (140°) at 4 kt, visibility 10+ statute miles, a few clouds at 3,600 ft, temperature 20°C (68°F), altimeter 29.71 inHg. Conditions are Visual Flight Rules (VFR).
METAR KASH 290456Z AUTO 14004KT 10SM FEW036 20/19 A2971 RMK AO2 SLP057 T02000189 403000128 PNO $
What changed at KASH (nearest station)?
Since the 0356Z (11:56 PM EDT) report — compared automatically against the latest METAR.
No significant changes since the 0356Z report — conditions are holding steady.
This is exactly what ATIS Alerts watches for you — get a Telegram message when MA74's weather changes, free →
Current pilot readout for MA74
Based on the nearest station (KASH), MA74 is currently VFR with winds from 140° at 4 knots, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway 13W, about 3 knots. Density altitude is approximately 950 ft (field elevation 90 ft). MA74 does not publish a TAF — the nearest TAF station is KBED, about 15 nm away.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
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Track MA74 free on TelegramRunway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Use this section to quickly compare current wind alignment across available runways at MA74. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 13WFAV | 2,500 ft | WATER | 3 kt tail | 3 kt right |
| 31W | 2,500 ft | WATER | 3 kt tail | 3 kt right |
Open the crosswind calculator — try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 0→4 kt, ceiling unlimited → unlimited.
MA74 weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.
Live weather radar around Larson's Seaplane Base in Tyngsboro, MA: the NOAA/NWS NEXRAD composite updates about every five minutes, with NOAA lightning strike density overlaid. The loop plays the past 50 minutes, then continues into a future-radar forecast (+1 to +4 hours, NOAA HRRR model) so you can see where precipitation around MA74 is headed.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © OpenStreetMap © CARTO
Forecast frames (amber label) are HRRR model guidance, not observed radar. Lightning strike density appears as a blue-white glow when strikes are detected in view. Radar and lightning coverage are limited in parts of Alaska, Hawaii, and offshore areas. Not for navigation.
Pilot reports (PIREPs) within 100 NM of MA74
Reported by pilots in flight over the past 6 hours — via aviationweather.gov.
Show raw report
BDL UA /OV BDL/TM 0407/FL031/TP B763/SK BKN031/RM DURD RY 24
BDL UAHeader — reporting station and UA: a routine pilot report.OV BDLLocation — fix or navaid, optionally with a radial and distance in NM.TM 0407Reported at 04:07 UTC.FL031Altitude: 3,100 ft MSL.TP B763Aircraft type reporting.SK BKN031Sky condition — cloud bases and tops in hundreds of feet MSL.RM DURD RY 24Remarks.Show raw report
BDL UA /OV BDL/TM 0313/FL025/TP A320/SK BKN025/RM DURD RY 24
BDL UAHeader — reporting station and UA: a routine pilot report.OV BDLLocation — fix or navaid, optionally with a radial and distance in NM.TM 0313Reported at 03:13 UTC.FL025Altitude: 2,500 ft MSL.TP A320Aircraft type reporting.SK BKN025Sky condition — cloud bases and tops in hundreds of feet MSL.RM DURD RY 24Remarks.Show raw report
BDL UA /OV BDL/TM 0305/FL020/TP C25B/SK BKN020/RM DURD RY 15
BDL UAHeader — reporting station and UA: a routine pilot report.OV BDLLocation — fix or navaid, optionally with a radial and distance in NM.TM 0305Reported at 03:05 UTC.FL020Altitude: 2,000 ft MSL.TP C25BAircraft type reporting.SK BKN020Sky condition — cloud bases and tops in hundreds of feet MSL.RM DURD RY 15Remarks.Show raw report
ALB UA /OV CAM/TM 0054/FL360/TP NMRS/TB CONT LGT
ALB UAHeader — reporting station and UA: a routine pilot report.OV CAMLocation — fix or navaid, optionally with a radial and distance in NM.TM 0054Reported at 00:54 UTC.FL360Altitude: 36,000 ft MSL.TP NMRSAircraft type reporting.TB CONT LGTTurbulence: cont light.Show raw report
PWM UA /OV PWM/TM 0050/FLDURD/TP B38M/SK OVC 002/RM BASES 150-200, SAW APCH LGTS JUST BEFORE MINS, SAW RUNWAY AT 100 ILS 11
PWM UAHeader — reporting station and UA: a routine pilot report.OV PWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 0050Reported at 00:50 UTC.FLDURDReported during descent.TP B38MAircraft type reporting.SK OVC 002Sky condition — cloud bases and tops in hundreds of feet MSL.RM BASES 150-200, SAW APCH L…Remarks.Show raw report
RUT UA /OV RUT350010/TM 0050/FL330/TP E75L/SK TOP350
RUT UAHeader — reporting station and UA: a routine pilot report.OV RUT350010Location — fix or navaid, optionally with a radial and distance in NM.TM 0050Reported at 00:50 UTC.FL330Altitude: 33,000 ft MSL.TP E75LAircraft type reporting.SK TOP350Sky condition — cloud bases and tops in hundreds of feet MSL.Show raw report
BAF UA /OV BAF164019/TM 2353/FL190/TP P46T/TB OCNL LGT CHOP
BAF UAHeader — reporting station and UA: a routine pilot report.OV BAF164019Location — fix or navaid, optionally with a radial and distance in NM.TM 2353Reported at 23:53 UTC.FL190Altitude: 19,000 ft MSL.TP P46TAircraft type reporting.TB OCNL LGT CHOPTurbulence: occasional light chop.Show raw report
LWM UA /OV LWM/TM 2341/FL187/TP E75S/TB NEG/RM SMOOTH DURC HYLND SID
LWM UAHeader — reporting station and UA: a routine pilot report.OV LWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 2341Reported at 23:41 UTC.FL187Altitude: 18,700 ft MSL.TP E75SAircraft type reporting.TB NEGTurbulence: none reported.RM SMOOTH DURC HYLND SIDRemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.
Recent aviation weather trends at MA74
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KASH reported a mix of conditions, most often VFR across 34 observations, with 11 flight-category changes. The strongest gust reached 23 kt, the lowest ceiling was 600 ft. Wind most often came from the SE.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
- 13W/31W
- 100%
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Airport facts
Reference data from the OurAirports dataset.
- Type
- Seaplane base
- FAA LID
- MA74
- City
- Tyngsboro
- State
- Massachusetts
- Country
- United States
- Elevation
- 90 ft
- Coordinates
- 42.6915, -71.4181
- Runways
- 2
- Longest runway
- 2,500 ft
- Weather reporting
- Nearest station KASH
- TAF
- Nearest KBED
- Time zone
- America/New_York
- Next sunset
- 18h 38m
Run a flight school, FBO, or club here? Embed MA74's live status on your website — free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
8 airports+2 more within 25 NM
25–50 NM
8 airports+2 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport — live wind, crosswind & flyability on each page.
- Granite State Quiet Flyers - W Hollis Rd — Nashua, NH · 6 mi
- Granite State Quiet Flyers 1 — Hudson, NH · 7 mi
- Merrimack Valley Air-istocrats, Main St — Westford, MA · 8 mi
MA74 weather — frequently asked
What runways are available at MA74?+
MA74 has 2 runways — 13W, 31W; the longest is 2,500 ft. This page computes the live crosswind for each runway end from the current wind.
Where does the weather shown for MA74 come from?+
Larson's Seaplane Base does not have its own weather station. Conditions shown here come from the nearest reporting station, KASH, about 7 nm away — close enough for situational awareness, but local conditions at MA74 can differ.
Does MA74 have a TAF?+
No — MA74 does not publish its own TAF. The nearest TAF station is KBED, about 15 nm away.
Does MA74 broadcast D-ATIS?+
No — MA74 does not broadcast D-ATIS. Alerts for MA74 from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR (via the nearest reporting station) instead.
Pilot PIREPs for Larson's Seaplane Base (MA74)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Larson's Seaplane Base, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for MA74 yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only — not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
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