The world's warnings, explained

Global Warnings

Who issues severe weather warnings worldwide, what their warning levels mean, and the US alerts feed read live. One rule runs through all of it: no data is never the same as no warnings.

United States — live layer

The one layer in this section that is read live, from the NOAA/NWS public alerts feed. When that feed has not been read, cannot be read or is out of date, this block says NO DATA and why.

ACTIVE

85 warnings, 28 watches and 253 advisories in force for US hazards, from the National Weather Service. Warnings, watches and advisories are different products.

The 5 most severe:

Flash Flood Warning · Severe

Flash Flood Warning issued October 10 at 10:39PM EDT until October 11 at 4:45AM EDT by NWS Greenville-Spartanburg SC

Rutherford, NC Source: NOAA/NWS

From 11 Oct 02:39 UTC (22:39 EDT), until 11 Oct 08:45 UTC (04:45 EDT).

Flash Flood Warning · Severe

Flash Flood Warning issued October 10 at 10:49PM MST until October 11 at 1:45AM MST by NWS Phoenix AZ

La Paz, AZ; Imperial, CA Source: NOAA/NWS

From 11 Oct 05:49 UTC, until 11 Oct 08:45 UTC. Local time withheld: this section could not fix the area's time zone with certainty.

Flash Flood Warning · Severe

Flash Flood Warning issued October 11 at 12:51AM PDT until October 11 at 2:00AM PDT by NWS Phoenix AZ

Imperial, CA Source: NOAA/NWS

From 11 Oct 07:51 UTC (00:51 PDT), until 11 Oct 09:00 UTC (02:00 PDT).

Flash Flood Warning · Severe

Flash Flood Warning issued October 10 at 11:16PM EDT until October 11 at 5:15AM EDT by NWS Greenville-Spartanburg SC

Henderson, NC; Polk, NC; Transylvania, NC Source: NOAA/NWS

From 11 Oct 03:16 UTC (23:16 EDT), until 11 Oct 09:15 UTC (05:15 EDT).

Flash Flood Warning · Severe

Flash Flood Warning issued October 11 at 4:10AM EDT until October 11 at 5:15AM EDT by NWS Greenville-Spartanburg SC

McDowell, NC Source: NOAA/NWS

From 11 Oct 08:10 UTC (04:10 EDT), until 11 Oct 09:15 UTC (05:15 EDT).

As of 08:33 UTC (04:33 EDT)

Source: NOAA/NWS National Weather Service

NO DATA

No reviewed bulletin is available. This is NO DATA — it does not mean there are no warnings anywhere.

What else is here

Country guides

Who issues warnings in 30 countries, and which we can show live. Browse all.

Level guides

What a specific colour or tier means in a specific country. Browse all.

Methodology

Sources, licences, scale mappings and how missing data is handled. Read it.