NOAA Weather Alert Codes


Code
WMO ID*
Watch, Warning, Alert, and Summary Message Name NOAA Scale
Extended Warning
Continued Alert
X-ray Flux Alert and Event Summaries
ALTXMF
WOXX01
ALERT: X-ray Flux exceeded M5
R2
SUMXM5
SUMX01
SUMX10
SUMX20
WOXX01
WOXX02
WOXX02
WOXX02
SUMMARY: X-ray Event exceeded M5
SUMMARY: X-ray Event exceeded X1
SUMMARY: X-ray Event exceeded X10
SUMMARY: X-ray Event exceeded X20
R2
R3
R4
R5
Radio Burst Summaries
ALTTP2
ALTTP4
WOXX04
WOXX04
ALERT: Type II Radio Emission
ALERT: Type IV Radio Emission
SUM10R
WOXX03
SUMMARY: 10cm Radio Burst
Geomagnetic Warnings, Alerts, and Watches
WARSUD
WOXX10
WARNING: Geomagnetic Sudden Impulse expected
SUMSUD
WOXX10
SUMMARY: Geomagnetic Sudden Impulse
WARK04
WARK05
WARK06
WARK07
WOXX13
WOXX11
WOXX12
WOXX14
WARNING: Geomagnetic K-index of 4 expected
WARNING: Geomagnetic K-index of 5 expected
WARNING: Geomagnetic K-index of 6 expected
WARNING: Geomagnetic K-index of 7 or greater expected

G1
G2
G3 or greater
Extended Warning
Extended Warning
Extended Warning
Extended Warning
ALTK04
ALTK05
ALTK06
ALTK07
ALTK08
ALTK09
WOXX13
WOXX11
WOXX12
WOXX14
WOXX15
WOXX16
ALERT: Geomagnetic K-index of 4
ALERT: Geomagnetic K-index of 5
ALERT: Geomagnetic K-index of 6
ALERT: Geomagnetic K-index of 7
ALERT: Geomagnetic K-index of 8
ALERT: Geomagnetic K-index of 9

G1
G2
G3
G4
G5
WATA20
WATA30
WATA50
WATA99
WOXX20
WOXX21
WOXX22
WOXX23
WATCH: Geomagnetic A-index of 20 or greater predicted
WATCH: Geomagnetic A-index of 30 or greater predicted
WATCH: Geomagnetic A-index of 50 or greater predicted
WATCH: Geomagnetic A-index of 100 or greater predicted
Electron Flux Alert
ALTEF3
WOXX30
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continued Alert
Proton Flux Warnings, Event Alerts, and Event Summaries
WARPX1
WOXX32
WARNING: Proton 10MeV Integral Flux above 10pfu expected
S1 to S5
Extended Warning
ALTPX1
WOXX32
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
S1
ALTPX2
WOXX32
ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
S2
ALTPX3
WOXX32
ALERT: Proton Event 10MeV Integral Flux exceeded 1000pfu
S3
ALTPX4
WOXX32
ALERT: Proton Event 10MeV Integral Flux exceeded 10000pfu
S4
ALTPX5
WOXX32
ALERT: Proton Event 10MeV Integral Flux exceeded 100000pfu
S5
SUMPX1
WOXX32
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
S1
SUMPX2
WOXX32
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
S2
SUMPX3
WOXX32
SUMMARY: Proton Event 10MeV Integral Flux exceeded 1000pfu
S3
SUMPX4
WOXX32
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10000pfu
S4
SUMPX5
WOXX32
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100000pfu
S5
WARPC0
WOXX31
WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extended Warning
ALTPC0
WOXX31
ALERT: Proton Event 100MeV Integral Flux exceeded 1pfu
SUMPC0
WOXX31
SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu

* WMO ID – WMO header identifiers appear on messages from NWS Systems, but not on SWPC messages.

Updated: February 15; 2001, Nov 24, 2004, October 1, 2007. October 26, 2010

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