Hail in Johnston · Mar 6, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.75" aloft. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Mar 6, 2026 · noon–noon UTC
Severity
The 6th most severe storm Johnston has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 19 /100
- Homes exposed
- 79 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Johnston saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
The storm in context
Where Mar 6, 2026 sits in Johnston's hail record.
This was Johnston's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 6th of the 8 storms we have logged here. Radar put the day's largest stone over Johnston at 0.75" — radar-estimated size aloft.
The Mar 6, 2026 convective day was bigger than Johnston: the same system put hail over 486 other tracked cities, 43 of them in Iowa. Nearest: Des Moines (7 miles south, up to 0.5"); Alleman (9 miles northeast, up to 0.75"); Woodward (12 miles northwest, up to 1").
These maps are stills. In the app this date is one of 8 Johnston storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
The National Weather Service logged no spotter reports for this storm over Johnston. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Near the severe threshold
What 0.75" hail means for Johnston roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$102M
Potential roof exposure — 8,489 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 42 jobs
- Illustrative work
- ~$630K
Close just 0.5% of the 8,489 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
March 2028
Claims from this storm can typically be filed until around March 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $1,783 on top of the $150 plan.
Johnston hail history
Other storms in Johnston.
Estimated-size surface Sep 8, 2026
2.5"
Estimated-size surface Jul 20, 2026
1.75"
Estimated-size surface Jun 11, 2026
0.75"
Estimated-size surface Jun 10, 2026
0.5"
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Apr 15, 2026
0.5"
Estimated-size surface Mar 30, 2026
1"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.