Hail in Jefferson · Mar 5, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface reached 0" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Mar 5, 2026 · noon–noon UTC
Severity
The 8th most severe storm Jefferson 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
- 25 /100
- Homes exposed
- 0 /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 Jefferson 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 5, 2026 sits in Jefferson's hail record.
This was Jefferson's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 8th of the 8 storms we have logged here. Radar put the day's largest stone over Jefferson at 1" — the largest NEXRAD radar signature.
The Mar 5, 2026 convective day was bigger than Jefferson: the same system put hail over 343 other tracked cities, 73 of them in Iowa. Nearest: Bayard (12 miles southwest, up to 1"); Guthrie Center (20 miles southwest, up to 0"); Lake City (23 miles northwest, up to 1").
These maps are stills. In the app this date is one of 8 Jefferson 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.
For this storm over Jefferson, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Damage-capable hail signal
What 1" hail means for Jefferson roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Jefferson hail history
Other storms in Jefferson.
Estimated-size surface Jul 20, 2026
0.5"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jun 28, 2026
1.25"
Estimated-size surface Jun 1, 2026
2"
Estimated-size surface May 15, 2026
0.5"
Estimated-size surface Apr 23, 2026
1.5"
Estimated-size surface Apr 15, 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.
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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.