You pulled in, left the eighth on the dash so you would not forget it, and ran inside. The lid was on. The walk felt fine. Maybe it was only seventy-something out. You come back and the steering wheel is a stove. The glass is hotter than the sidewalk. The nugs still look kind. The room you just built around them was not a cupboard. It was a kiln.
Somebody always swears five minutes does not count. Somebody cracks the windows and calls it handled. Somebody hides the jar under a seat and figures shade inside a closed car is the same as a closet. Same batch. Different rooms. Take the jar with you.
The jar is a still was what leaves when you crack the lid. Amber is senescence was the balloon. The name is not the plant was the sticker. The freezer is not a time machine was months of cool storage. The pack is not a cure is moisture. Light is the faster insult is the sill in a house. This chapter is the closed car.
How to keep the jar
Take it with you. Do not leave flower in a closed car in the sun, even when the sidewalk feels mild. Cracked windows are not a cellar. Under the seat is still inside the greenhouse. The dash is the worst seat in that room because the sun hits it first.
Cool still helps over months, and that is Chapter 4. Dark still comes first in a house, and that is Chapter 6. Tonight the keep is shorter than both. The car is not storage.
A cupboard at 68 is not that Civic
The herbal storage paper people lean on for "heat did not matter" was not talking about a parked car. Fairbairn, Liebmann, and Rowan said the effect of temperature, up to 20 °C, was insignificant in their design. Light was the big insult in that paper, and they were careful to say not even direct sun. Carefully prepared herbal material, stored dark at room temperature, can be reasonably stable for one to two years on the cannabinoid line. That is a cupboard story. It is not a dash story (Fairbairn, Liebmann, and Rowan, 1976, https://doi.org/10.1111/j.2042-7158.1976.tb04014.x).
Twenty °C is 68 °F. A closed car in sun is not that room. Do not take their temperature clause on a drive.
What a closed cabin actually does
The paper that measured the cabin is not a flower paper. McLaren, Null, and Quinn parked a dark-blue Honda Accord in full sun on sixteen clear days in Fremont, California. Ambient air ran 72 to 96 °F. They put the sensor in the shade, fifteen inches above the rear seat, so they were reading cabin air, not a dashboard in the beam. The rate of rise did not care how mild the start was. About 80 percent of the climb happened in the first thirty minutes. On the coolest day they ran, 72 °F outside, the air inside still reached 117 °F in an hour. Across that whole range the cabin gained about forty degrees. Cracking the windows an inch and a half did not save the room. Pre-cooling with the A/C only bought about five minutes (McLaren, Null, and Quinn, 2005, https://doi.org/10.1542/peds.2004-2368).
That is the kiln. The National Weather Service says a dark dashboard can run 180 to over 200 °F. That is their safety language for how the greenhouse works, not a trial we ran in a lot (NWS, Children, Pets and Vehicles).
A later forensic paper put the same greenhouse in a model. Parked in sun, cabin air can sit more than 20 °C above the street. A black car ran about 5 °C hotter inside than a white one. Dropping the driver's window 2.5 cm cut about 3 °C, which they called not enough for the question they were asking (Dadour, Almanjahie, Fowkes, Keady, and Vijayan, 2011, https://doi.org/10.1016/j.forsciint.2010.10.009).
Southern Ohio already knows the feel. July parking lot. May sun that still slants hard. You do not need Phoenix numbers to believe the wheel is a stove.
We did not trial the eighth in that car
Nobody I can find put dried flower in a parked car and published the terpene panel or the acids. McLaren measured air. Dadour modeled air. Fairbairn never left the cupboard. I am not inventing an n, and I am not borrowing an oven study on extracts at 80 °C and pretending it is your dash.
This chapter does not say how much gas left after one hour on the glass. It says the room you built is a kiln. The keep is to get the jar out of it. Practice, not a trial of the flower. If someone later runs the eighth in that Honda, we can write the numbers. Until then, take it with you.
The freezer chapter was months. The light chapter was a sill in a house. This one is the errand. Different clock. Same stash.
McLaren 2005 is in hand. One sedan, California sun, sixty minutes, cabin air in the shade. It is not Cincinnati and it is not a jar. Dadour 2011 is an abstract on this pass. The NWS dashboard range is comms, not a methods table. Wang 2016 decarboxylated extracts in a vacuum oven at 80 °C and up. That clock stays off this dash. I did not find a flower-in-vehicle paper. I am not filling that hole.
21+. Educational. No medical claims. This is about how you keep the flower.
Sources
- McLaren C, Null J, Quinn J. Heat stress from enclosed vehicles: moderate ambient temperatures cause significant temperature rise in enclosed vehicles. Pediatrics. 2005;116(1):e109–e112. Cabin air, not flower. Dark-blue Honda Accord, 16 clear days, Fremont, CA. Ambient 72–96 °F. Sensor in shade, 15 inches above rear seat. ~80% of the rise in the first 30 minutes. On a 72 °F day, cabin air reached 117 °F in 60 minutes. About 40 °F gain across the range. Windows cracked 1.5 inches did not save the room. A/C pre-cool bought about 5 minutes. https://doi.org/10.1542/peds.2004-2368
- Fairbairn JW, Liebmann JA, Rowan MG. The stability of cannabis and its preparations on storage. Journal of Pharmacy and Pharmacology. 1976;28(1):1–7. Temperature up to 20 °C (68 °F) described as insignificant in that design. That clause does not cover a parked car. https://doi.org/10.1111/j.2042-7158.1976.tb04014.x
- Dadour IR, Almanjahie I, Fowkes ND, Keady G, Vijayan K. Temperature variations in a parked car. Forensic Science International. 2011;207(1-3):205–211. Abstract this pass. Cabin air model, not flower. https://doi.org/10.1016/j.forsciint.2010.10.009
- National Weather Service. Children, Pets and Vehicles. Comms language for dashboard temperatures (180 to over 200 °F). Not a methods table and not a flower trial.
Flagged / not used as numbers: any flower-in-car n (none found); Wang 2016 extract oven clocks at 80 °C; treating Fairbairn’s 20 °C clause as a parked-car result; treating McLaren’s cabin air as a terpene or acid panel.
Series note
This is chapter 7 of a CincyCannaDash quality library. The still runs. The balloons leak. The lid is a rumor. The sealed jar still ages. Light is the faster insult. The closed car is a kiln. Next is not locked.
The live board is today's menu. Dated lab reports sit next to the lots, and areas lists the Southern Ohio towns we already serve. 21+. (513) 986-5438.