Soundings › Miami
Miami, FL weather balloon
Launch of 2026-10-28 00Z (evening launch, US time) · ground level 16 ft above sea level, 75°F at launch
What it means
Strong wind just above the ground: 39 mph near 3,000 ft
A fast river of air sits a few thousand feet up (a low-level jet). Once the sun heats the ground, some of it can mix down as gusts. Drones, cranes and tall structures feel it first, and at night it can feed storms.
1.90 inches of water in the air
Very moist air. Any storms could drop heavy rain fast, so watch low spots, ditches and excavations for flooding.
Freezing level about 17,200 ft up
Rain stays rain at the ground. Hail has a long way to fall through warm air and often melts smaller.
Wind at crane height: 18 mph from the N
At about 260 ft the wind was 18 mph, against 12 mph at the ground: 1.6 times stronger. Wind at height is often much stronger than at the ground, especially at night and in the morning. Many outdoor aerial lifts are rated for winds up to 28 mph; crane limits depend on the crane and the load, so check its manual.
Some storm fuel (464 J/kg CAPE)
If something lifts the air (heating, a front, hills), storms could grow. The wind doesn't change much with height, so storms that form would tend to be short-lived. Whether storms form at all depends on other things too.
Temperature and moisture by height
Temperature Dew point Freezing (32°F)
Heights are above the ground. The closer the two lines, the more humid; where they touch, there's cloud.
Wind by height
| At the ground | NNE 12 mph |
|---|---|
| About 260 ft (crane and lift height) | N 18 mph |
| 1,000 ft | N 29 mph |
| 3,000 ft | NNE 39 mph |
| 5,000 ft | NE 34 mph |
| 10,000 ft | NE 16 mph |
| 18,000 ft | NNW 13 mph |
| 30,000 ft | NW 40 mph |
Direction is where the wind comes from.
- Storm fuel (CAPE)
- 464 J/kg
- Wind change, ground to 20,000 ft
- 13 mph
- Water in the air
- 1.90 in
- Freezing level
- 17,200 ft
About soundings
Balloons go up at about 6 a.m. and 6 p.m. Central time (12Z and 00Z) and take about 2 hours to climb. The numbers show what the air was doing at launch, so they are a snapshot, not a forecast. Conditions change through the day, especially in the afternoon and when a front passes.
Wind at crane height is the measured wind about 260 ft (80 m) up. Storm fuel (CAPE) is how strongly a rising bubble of air would keep rising. Wind change with height (shear) helps storms last and turn severe. Water in the air (precipitable water) is how much rain the whole column would make if it all fell. Notes like these are a planning aid, not an official forecast or warning. For warnings, follow the National Weather Service.
Want this for a job? AtmosDays Plus and Pro show the HRRR model's hour-by-hour wind at crane height for each jobsite, for the next 2 days. See how it works.
Data: NOAA National Weather Service upper-air sounding, via Iowa State University's Iowa Environmental Mesonet. Explanations by AtmosDays; storm fuel is for the most unstable air in the lowest 10,000 ft or so.