Lawrence J Timmerman Airport (KMWC), Wisconsin
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Lawrence J Timmerman Field (KMWC) is a towered public-use airport in Milwaukee, Wisconsin, serving primarily business aviation traffic on the north side of the metro area. The field offers a paved runway of 4,107 feet alongside a second paved strip and two turf runways, with 100LL and A+ fuel available and Jet A on the field. Nearest customs clearance is handled through KMKE, roughly 11.5 nautical miles away, since customs is not processed on site at KMWC.
Runways
Lawrence J Timmerman Airport has four paved and unpaved runways. The longest, 15L/33R, is 4,107 ft long and 75 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Runways are listed longest first.
Source: FAA Form 5010.
Fuel and airfield services
Lawrence J Timmerman Airport has Jet A+ and 100LL available on the field. Fueling is available from 8am to 4pm, daily, and the airport has an operating control tower.
Source: FAA Form 5010 / NASR.
Customs
Lawrence J Timmerman Airport does not clear customs. The nearest port of entry is General Mitchell International (KMKE), 12 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Lawrence J Timmerman Airport recorded 1,194 business aviation movements in 2025. Traffic peaks in August. Business aviation traffic at KMWC builds through the year and peaks in August at 192 operations before dropping sharply in the winter months, with December recording the lowest count at 31.
Business jet movements, FAA TFMSC count. Peak month August, 192 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Lawrence J Timmerman Airport has published operating constraints in four categories: access, runway notes, environmental and other notes.
When the VASI is out of service, the runway is closed to landings from sunset to sunrise.
The system is unusable beyond 8 degrees right of centerline. When the PAPI is out of service, the runway is closed to landings from sunset to sunrise.
When the control tower is closed, the MIRL for runway 15L/33R is preset to low intensity from sunset to sunrise. To increase intensity and activate the REILs for runways 04L, 15L, 22R, and 33R, the PAPI for runways 15L and 33R, the VASI for runways 04L and 22R, and the MIRL for runway 04L/22R, use CTAF.
The runway is marked using white traffic cones.
Turf runways 04R/22L and 15R/33L, along with all turf taxiways, are closed from October 15 through May 1.
Birds are present on and in the vicinity of the airport.
The beacon elevation is 797 feet MSL.
Airfield conditions are unmonitored Monday through Friday from 1530 to 0630, as well as on Saturdays, Sundays, and federal holidays.
Do not mistake taxiways B and C for landing or takeoff surfaces.
Loss of radio reception occurs in and around the hangars north of the north ramp. Aircraft should reposition to the north ramp to receive clearance and taxi instructions.
Source: FAA Chart Supplement.
Nearby airfields
Lawrence J Timmerman Airport has five airfields within 24 NM. The closest is Waukesha County (KUES), 9.81 NM southwest.
Part of the Milwaukee and Madison area.
Source: Skystar calculation from official coordinates.
Skystar at KMWC
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at KMWC.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What is the longest runway at KMWC?
The longest runway at Lawrence J Timmerman Field is 15L/33R, a paved asphalt surface measuring 4,107 feet long and 75 feet wide. The airport's other paved runway, 04L/22R, is shorter at 3,203 feet. Two additional turf runways, 15R/33L and 04R/22L, are also available but are seasonal rather than year-round options for arriving traffic.
Are the turf runways at KMWC usable year-round?
No, the turf runways at Lawrence J Timmerman Field are seasonal. Runways 04R/22L and 15R/33L, along with all turf taxiways, are closed from October 15 through May 1 each year. Pilots planning operations at KMWC outside that window should default to one of the two paved runways, 15L/33R or 04L/22R.
Where does KMWC direct aircraft for customs clearance?
KMWC does not process customs on site; the nearest customs facility is General Mitchell International (KMKE), located about 11.5 nautical miles away. Aircraft requiring customs clearance near Lawrence J Timmerman Field should plan to route through KMKE rather than expecting service at Timmerman itself.
When is airfield condition monitoring unavailable at KMWC?
Airfield conditions at Lawrence J Timmerman Field are unmonitored Monday through Friday from 1530 to 0630 local, as well as on weekends and federal holidays. During these periods, pilots should not assume runway or taxiway surface conditions have been checked and should exercise added caution, particularly given the airport's mix of paved and seasonal turf surfaces.