Hail size 1.25"
2 NE Blue Springs Jackson County
“Time confirmed from radar. (EAX)”
— NOAA / SPC storm report
/ Storm field report · Jackson
Hail in Grain Valley · Mar 10, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Grain Valley that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.5" ≈ pea to penny · radar-estimated size aloft
Homes in the hail footprint 4,991
Ground reports 2 2 hail
Radar surfaces 1 Estimated size only
Convective day · Mar 10, 2026 · noon–noon UTC
Severity
The most severe storm Grain Valley has seen in the last 12 months
Composite score · 3.1 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.1 /10
- Peak hail signal
- 13 /100
- Homes exposed
- 74 /100
- Ground truth
- 33 /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 Grain Valley saw the hail — from two instruments
Mar 10, 2026 · Grain Valley, MO
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-estimated hail size Surface resolved
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.
Max size
0.5"
Only the radar-estimated size surface resolved for Mar 10, 2026 — this storm produced no NEXRAD point detections over Grain Valley, so there is one map to show, not two.
The storm in context
Where Mar 10, 2026 sits in Grain Valley's hail record.
This was Grain Valley's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 2 storms we have logged here. Radar put the day's largest stone over Grain Valley at 0.5" — radar-estimated size aloft.
The Mar 10, 2026 convective day was bigger than Grain Valley: the same system put hail over 470 other tracked cities, 63 of them in Missouri. Nearest: Blue Springs (5 miles west, up to 0.75"); Napoleon (9 miles northeast, up to 0.75"); Wellington (13 miles northeast, up to 0.75").
These maps are stills. In the app this date is one of 2 Grain Valley 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
2 reports filed with the NWS
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.
Hail reports
2 reports Hail size 1"
3 NE Blue Springs Jackson County
“Report from mPING: Quarter (1.00 in.). (EAX)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Blue Springs — beyond Grain Valley itself.
Below the severe threshold
What 0.5" hail means for Grain Valley roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
4,991 homes × $12,000 avg. claim
Potential roof exposure
$60M
Potential roof exposure — 4,991 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 25 jobs
- Illustrative work
- ~$375K
Close just 0.5% of the 4,991 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 $1,048 on top of the $150 plan.
Grain Valley hail history
Other storms in Grain Valley.
2 recorded storm days in Grain Valley, MO
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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A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 2, 2026.