Index of /

MRMS Hourly Zip Files

Update 2 Jan 2026 A previous cloud storage that supported this archive went away, so the purpose of this archival is changing. Please see an updated IEM MRMS Archive mainpage for more details.

NEW! NOAA MRMS Amazon Archive with data since 21 July 2022.

This service maintains about a 30 TB near-term archive of NCEP MRMS data.

Filename Convention: YYYY/mm/dd/YYYYmmddHH24.zip. For example, a filepath named 2022/01/01/2022010112.zip would be the MRMS content between 12 and 13 UTC on January 1, 2022.

When browsing content on this server, you may see a zip file with only about 70 byte size reported. This file is a virtual file that is redirected to CyBox on request.

Example wget command to download file.

wget -L -O 2021060100.zip https://mrms.agron.iastate.edu/2021/06/01/2021060100.zip

The `-L` is important to handle the redirect and the `-O` is import to get the downloaded filename right after getting redirected.

Example python code to download two days worth of content.

import datetime
import subprocess

# Get hourly files from June 1 and June 2 2021
now = datetime.datetime(2021, 6, 1, 0)
utc_end = datetime.datetime(2021, 6, 3, 0)

while now < utc_end:
    cmd = (
        'wget -L -O ' + now.strftime('%Y%m%d%H') + '.zip ' +
        'https://mrms.agron.iastate.edu/' + now.strftime('%Y/%m/%d/%Y%m%d%H') + '.zip'
    )
    print(cmd)
    subprocess.run(cmd, shell=True)
    now += datetime.timedelta(hours=1)

Zip Bomb Protection

For reasons I am unsure of, you may get errors unzipping the files. Here are two known workarounds for this.

UNZIP_DISABLE_ZIPBOMB_DETECTION=TRUE unzip filename.zip

zip -FF filename.zip --out newfilename.zip and then extract the newly created zipfile.

Please contact daryl herzmann akrherz@iastate.edu with any questions.

Name	Last modified	Size

2026/	2026-01-01 00:28	-
2025/	2025-12-01 05:32	-
2024/	2025-12-03 05:25	-
2023/	2025-11-26 05:17	-
2022/	2025-11-05 13:07	-
2021/	2025-10-27 08:48	-
2020/	2025-10-28 21:54	-
2019/	2025-09-30 13:53	-