StormVault

Date & Time Range (UTC)

SuMoTuWeThFrSa

Time Window What's this?

Time Window Explained

Convective Day (12Z–12Z) — The NWS/SPC standard "severe weather day." Runs from 12:00 UTC (noon) on the selected date to 12:00 UTC the next day. This captures the full afternoon-through-overnight severe window.

Calendar Day (00Z–24Z) — Exact midnight-to-midnight UTC. Useful for matching raw calendar boundaries.

Custom — Set your own start and end times in UTC.

Warning Types to Fetch

Storm Reports What's the difference?

IEM LSR vs SPC Reports

IEM LSR — Raw Local Storm Reports from NWS offices. Real-time. May include duplicates (multiple reports per event from spotters, radar, surveys). Best for same-day events.

SPC Filtered — Post-processed by SPC staff. De-duplicated, one entry per event. Best for clean counts and historical analysis. Typically available next day.

SPC Unfiltered — All raw reports archived by SPC. Same as IEM LSR but from SPC's archive. Useful when IEM LSR isn't available.

Tip: Use IEM LSR for live events, SPC Filtered for next-day and historical review.

Tornado Hail Wind

Sources to Fetch

▶ Filter Reports

State

Type

Rating

Search

▶ Loaded Layer Options

Tornado

Tornado Emergency—

PDS Tornado—

TOR — Confirmed—

TOR — Radar Indicated—

Severe Thunderstorm

SVR — Destructive—

SVR — Considerable—

SVR — Standard—

Flash Flood

Flash Flood Emergency—

FF — Catastrophic—

FF — Considerable—

FF — Standard—

Marine

Marine Warning—

▶ Style Edits

Fill40%

Stroke1.0

Outline0.8

Outline color

▶ Warning Color Edits

Tornado

Tornado Emergency

PDS Tornado

TOR Confirmed

TOR Radar Indicated

Severe Thunderstorm

SVR Destructive

SVR Considerable

SVR Standard

Flash Flood

Flash Flood Emergency

FF Catastrophic

FF Considerable

FF Standard

Marine

Custom Load Files

📦 IEM Warning .ZIP

📄 SPC Report .CSV

STORMVAULT