daryl herzmann
@akrherz.bsky.social
Iowa Environmental Mesonet https://mesonet.agron.iastate.edu ,
Father of all the IEMBots here,
https://github.com/akrherz
Signal >> Noise, hopefully.
Father of all the IEMBots here,
https://github.com/akrherz
Signal >> Noise, hopefully.
Reposted by daryl herzmann
November 13, 2025 at 5:22 PM
With Ames + Des Moines, IA having a high of 67°F today, my kids forced me to compute the climate sites with the highest frequency of a six seven high temp. The overall "winner" within my database is Hawaii National Park, HI (~1200m) at 25 days per year with a number of CA sites not far behind. #sigh
October 20, 2025 at 10:46 PM
With Ames + Des Moines, IA having a high of 67°F today, my kids forced me to compute the climate sites with the highest frequency of a six seven high temp. The overall "winner" within my database is Hawaii National Park, HI (~1200m) at 25 days per year with a number of CA sites not far behind. #sigh
NWS Norman just issued their 1,112th Severe Thunderstorm Warning this year, which is now ~12% higher than their previous year's max of 988. (Glad VTEC implemented 4 digit tracking event numbers!)
Was computing some stats and realized NWS Norman has issued over 1,000 Severe Thunderstorm Warnings this year! Here's the top 10 yearly counts
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
September 23, 2025 at 8:35 PM
NWS Norman just issued their 1,112th Severe Thunderstorm Warning this year, which is now ~12% higher than their previous year's max of 988. (Glad VTEC implemented 4 digit tracking event numbers!)
I do check X once a day for anybody contacting me for help and noticed this trending there. @shawnmilrad.bsky.social if you are listening...
September 23, 2025 at 3:19 PM
I do check X once a day for anybody contacting me for help and noticed this trending there. @shawnmilrad.bsky.social if you are listening...
Reposted by daryl herzmann
We’re en route to a -7 point 4th quarter.
September 20, 2025 at 2:29 AM
We’re en route to a -7 point 4th quarter.
The Hawkeyes are 34-1 when scoring 21+ points since 2020.... Wait, Iowa has scored 21 points in 35 games over the past 5 years? That seems high.
September 20, 2025 at 1:45 AM
The Hawkeyes are 34-1 when scoring 21+ points since 2020.... Wait, Iowa has scored 21 points in 35 games over the past 5 years? That seems high.
Surprised to find the Aviation Weather Center METAR service discontinued overnight. The future is here I guess: aviationweather.gov/data/api/ Continues my long standing rant that the NCEP centers do whatever they want on the web while weather.gov can't change anything without SCN/comment period.
September 18, 2025 at 12:57 PM
Surprised to find the Aviation Weather Center METAR service discontinued overnight. The future is here I guess: aviationweather.gov/data/api/ Continues my long standing rant that the NCEP centers do whatever they want on the web while weather.gov can't change anything without SCN/comment period.
Computed statistic for yearly percentage of NWS Tornado Warnings that are "RADAR Indicated" at warning issuance.
2017 92.4%
2018 92.0%
2019 90.6%
2020 92.1%
2021 88.8%
2022 92.1%
2023 88.5%
2024 91.0%
2025 90.7%
2017 92.4%
2018 92.0%
2019 90.6%
2020 92.1%
2021 88.8%
2022 92.1%
2023 88.5%
2024 91.0%
2025 90.7%
August 28, 2025 at 4:12 PM
Computed statistic for yearly percentage of NWS Tornado Warnings that are "RADAR Indicated" at warning issuance.
2017 92.4%
2018 92.0%
2019 90.6%
2020 92.1%
2021 88.8%
2022 92.1%
2023 88.5%
2024 91.0%
2025 90.7%
2017 92.4%
2018 92.0%
2019 90.6%
2020 92.1%
2021 88.8%
2022 92.1%
2023 88.5%
2024 91.0%
2025 90.7%
When I see posts with old text products, I like to see if my archives have it. Cool! mesonet.agron.iastate.edu/wx/afos/p.ph...
Perhaps because I was familiar with Ed and Andrew struck after my first summer working at WSFO MIA, this TCU still haunts me.
August 23, 2025 at 12:21 PM
When I see posts with old text products, I like to see if my archives have it. Cool! mesonet.agron.iastate.edu/wx/afos/p.ph...
Yeah, my database shows this as a record for most-delayed LSR...
[Delayed Report] On Aug 19, at 4:53 PM CDT, 4 SE Mead [Saunders Co, NE] Mesonet reports Tstm Wnd Gst of M128 MPH. Very delayed report (2021). Received from UNL School of Natural Resources. Appears to have occurred in the rear flank downdraft... #newx Link
August 19, 2025 at 5:22 PM
Yeah, my database shows this as a record for most-delayed LSR...
Was computing some stats and realized NWS Norman has issued over 1,000 Severe Thunderstorm Warnings this year! Here's the top 10 yearly counts
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
August 14, 2025 at 10:53 AM
Was computing some stats and realized NWS Norman has issued over 1,000 Severe Thunderstorm Warnings this year! Here's the top 10 yearly counts
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
2025 OUN 1003
2024 OUN 988
2019 OUN 942
2017 OUN 923
2016 OUN 907
2011 LZK 901
2023 OUN 894
2008 OUN 871
2008 JAN 823
2003 JAN 796
I have @nws.noaa.gov issuing 173 Svr TStorm Warns for yesterday (Central TZ) and 0 Tor Warns. Top 10 dates with the highest # of SVRs and 0 TORs.
2012/7/5 -371
2023/9/7 -300
2024/8/17 -249
2012/7/8 -244
2023/7/30 -243
2023/9/8 -218
2019/8/18 -216
2010/5/28 -210
2021/8/13 -193
2005/8/5 -187
2012/7/5 -371
2023/9/7 -300
2024/8/17 -249
2012/7/8 -244
2023/7/30 -243
2023/9/8 -218
2019/8/18 -216
2010/5/28 -210
2021/8/13 -193
2005/8/5 -187
July 30, 2025 at 12:25 PM
I have @nws.noaa.gov issuing 173 Svr TStorm Warns for yesterday (Central TZ) and 0 Tor Warns. Top 10 dates with the highest # of SVRs and 0 TORs.
2012/7/5 -371
2023/9/7 -300
2024/8/17 -249
2012/7/8 -244
2023/7/30 -243
2023/9/8 -218
2019/8/18 -216
2010/5/28 -210
2021/8/13 -193
2005/8/5 -187
2012/7/5 -371
2023/9/7 -300
2024/8/17 -249
2012/7/8 -244
2023/7/30 -243
2023/9/8 -218
2019/8/18 -216
2010/5/28 -210
2021/8/13 -193
2005/8/5 -187
RyNoooooooooo!
With great sadness, we share that Ryne Sandberg has passed away today.
July 29, 2025 at 1:42 AM
RyNoooooooooo!
Reposted by daryl herzmann
Cumulus clouds swirl along the Gulf Coast.
This mesmerizing view captured yesterday by GOES-19.
This mesmerizing view captured yesterday by GOES-19.
July 28, 2025 at 6:42 PM
Cumulus clouds swirl along the Gulf Coast.
This mesmerizing view captured yesterday by GOES-19.
This mesmerizing view captured yesterday by GOES-19.
Whew, but shows the temperature happening at 3:42 PM EST -> 2:42 PM EDT. This stuff is all way more complicated than it should be.
KTPA DS 1600 27/07 1001542/ 830611// 100/
mesonet.agron.iastate.edu/wx/afos/p.ph...
KTPA DS 1600 27/07 1001542/ 830611// 100/
mesonet.agron.iastate.edu/wx/afos/p.ph...
I always get super nervous seeing things like this based off the 5 minute MADIS data at 38C! We'll see once the DSM comes any minute now :)
We did it!! Tampa hit 100 degrees at the airport at 3:30 pm for the first time on record!!
Records go back to 1890. It took 135 years.
It’s still unofficial. NWS will have to verify.
Records go back to 1890. It took 135 years.
It’s still unofficial. NWS will have to verify.
July 27, 2025 at 9:14 PM
Whew, but shows the temperature happening at 3:42 PM EST -> 2:42 PM EDT. This stuff is all way more complicated than it should be.
KTPA DS 1600 27/07 1001542/ 830611// 100/
mesonet.agron.iastate.edu/wx/afos/p.ph...
KTPA DS 1600 27/07 1001542/ 830611// 100/
mesonet.agron.iastate.edu/wx/afos/p.ph...
I always get super nervous seeing things like this based off the 5 minute MADIS data at 38C! We'll see once the DSM comes any minute now :)
We did it!! Tampa hit 100 degrees at the airport at 3:30 pm for the first time on record!!
Records go back to 1890. It took 135 years.
It’s still unofficial. NWS will have to verify.
Records go back to 1890. It took 135 years.
It’s still unofficial. NWS will have to verify.
July 27, 2025 at 8:06 PM
I always get super nervous seeing things like this based off the 5 minute MADIS data at 38C! We'll see once the DSM comes any minute now :)
One always feels bad emailing the SDM in these situations as they likely are getting slammed by emails and can't send any alerts themselves as their dissemination is down as well. Alas, a data flow outage is afoot...
July 18, 2025 at 3:25 AM
One always feels bad emailing the SDM in these situations as they likely are getting slammed by emails and can't send any alerts themselves as their dissemination is down as well. Alas, a data flow outage is afoot...
Onto rebooting the next thing
July 16, 2025 at 7:25 PM
Onto rebooting the next thing
We have reached the reboot stage of this outage.
July 16, 2025 at 6:55 PM
We have reached the reboot stage of this outage.
By design or luck(?) that the few radars that are online are all with the current tornado warnings...
July 16, 2025 at 6:12 PM
By design or luck(?) that the few radars that are online are all with the current tornado warnings...
2.5 hours into the outage, we get our first update.
July 16, 2025 at 6:02 PM
2.5 hours into the outage, we get our first update.
Suboptimal, but looks colorful.
July 16, 2025 at 4:21 PM
Suboptimal, but looks colorful.
Plot shows weekly normalized NWS issuance counts of TOR, SVR, and FF Warnings. Top panel is Iowa WFOs and the bottom panel is nationwide. For Iowa, small populations during winter weeks cause the noisy bars. Clean annual signals otherwise.
July 14, 2025 at 12:06 AM
Plot shows weekly normalized NWS issuance counts of TOR, SVR, and FF Warnings. Top panel is Iowa WFOs and the bottom panel is nationwide. For Iowa, small populations during winter weeks cause the noisy bars. Clean annual signals otherwise.