El Niño update, September 24: what to know
California: Flash Flood Warning and Red Flag Warning in effect as of 5:03 PM, Sep 24 Pacific. NOAA's Climate Prediction Center ENSO status: El Niño Advisory.
NOAA’s current status
El Niño Advisory
ONI +1.8 °C (JJA 2026) · next CPC update October 8, 2026 · CPC discussion (opens in a new tab)
What CPC, ONI, NWS and D0–D4 mean
- CPC
- NOAA’s Climate Prediction Center, which sets the El Niño and La Niña status (Watch, Advisory) once a month.
- ONI
- The Oceanic Niño Index: how much warmer (+) or cooler (−) than normal the surface of the central Pacific Ocean was over three months. The letters are the months, so JJA is June, July and August. El Niño conditions are +0.5 °C or warmer.
- NWS
- The National Weather Service, which issues the weather watches, warnings and advisories for your area.
- D0–D4
- The U.S. Drought Monitor’s levels: D0 abnormally dry, D1 moderate drought, D2 severe, D3 extreme and D4 exceptional drought. Each percentage is the share of the state at that level or worse.
Region by region
California and the Sierra
8 active alerts
What’s happening
- Active NWS alert: Flash Flood Warning, in effect until 6:15 PM PDT (NWS Las Vegas NV). Source: NWS active alerts — CA (opens in a new tab)
- Active NWS alert: Red Flag Warning, in effect until 8:00 PM PDT (NWS Medford OR). Source: NWS active alerts — CA (opens in a new tab)
What to watch for
- NOAA’s Climate Prediction Center says: “Slight risk of high winds for parts of the California and southwestern Oregon coast, Fri-Sun, Oct 2-4.” Source: CPC U.S. Hazards Outlook (opens in a new tab)
Active NWS alerts: Lake Wind Advisory: 3 (CA) · Flood Advisory: 2 (CA) · Air Quality Alert: 1 (CA) · Flash Flood Warning: 1 (CA) · Red Flag Warning: 1 (CA)
Southern California
3 active alerts
What’s happening
- Active NWS alert: Flash Flood Warning, in effect until 7:30 PM PDT (NWS San Diego CA). Source: NWS active alerts — CA (opens in a new tab)
- Active NWS alert: Beach Hazards Statement, in effect until 5:00 PM PDT (NWS San Diego CA). Source: NWS active alerts — CA (opens in a new tab)
What to watch for
No items for this region in this post.
Active NWS alerts: Beach Hazards Statement: 1 (CA) · Flash Flood Warning: 1 (CA) · Flood Advisory: 1 (CA)
The Southwest
23 active alerts
What’s happening
- Active NWS alert: Flash Flood Warning, in effect until 8:45 PM MDT (NWS Albuquerque NM). Source: NWS active alerts — NM (opens in a new tab)
- Active NWS alert: Flash Flood Warning, in effect until 6:15 PM MDT (NWS El Paso Tx/Santa Teresa NM). Source: NWS active alerts — NM (opens in a new tab)
What to watch for
- The Weather Prediction Center says: “Widespread precipitation likely in the Four Corners states and reaching the Plains/Mississippi Valley early to mid-next week” Source: WPC Extended Forecast Discussion (opens in a new tab)
- NOAA’s Climate Prediction Center says: “This potential TC may track northward towards the Baja California Peninsula early in week-2 which could bring enhanced low to mid-level moisture to the Desert Southwest.” Source: CPC 6-10 / 8-14 Day Outlook Discussion (opens in a new tab)
Active NWS alerts: Flash Flood Warning: 9 (NM) · Flood Advisory: 3 (AZ, NM) · Flood Watch: 3 (NM) · Lake Wind Advisory: 3 (NV) · Red Flag Warning: 2 (NV) · Special Weather Statement: 2 (AZ, NM) · Flood Warning: 1 (NM)
The Gulf Coast
10 active alerts
What’s happening
- Active NWS alert: Flash Flood Warning, in effect until 7:45 PM CDT (NWS Midland/Odessa TX). Source: NWS active alerts — TX (opens in a new tab)
- Active NWS alert: Flash Flood Warning, in effect until 8:15 PM CDT (NWS Lubbock TX). Source: NWS active alerts — TX (opens in a new tab)
What to watch for
- NOAA’s Climate Prediction Center says: “Therefore, above-normal precipitation probabilities are enhanced from eastern Texas and the Lower Mississippi Valley north to the Ohio Valley.” Source: CPC 6-10 / 8-14 Day Outlook Discussion (opens in a new tab)
Active NWS alerts: Flash Flood Warning: 3 (TX) · Flood Watch: 3 (TX) · Air Quality Alert: 2 (TX) · Severe Thunderstorm Warning: 1 (TX) · Special Weather Statement: 1 (TX)
The Southeast
39 active alerts
What’s happening
- Active NWS alert: Coastal Flood Warning, in effect until 10:00 AM EDT (NWS Wakefield VA). Source: NWS active alerts — NC (opens in a new tab)
- Active NWS alert: Coastal Flood Warning, in effect until 11:00 PM EDT (NWS Newport/Morehead City NC). Source: NWS active alerts — NC (opens in a new tab)
What to watch for
- NOAA’s Climate Prediction Center says: “Slight risk of heavy precipitation for much of the southeastern CONUS, Fri-Mon, Oct 2-5.” Source: CPC U.S. Hazards Outlook (opens in a new tab)
- NOAA’s Climate Prediction Center says: “The front is expected to slow its southward progression and above-normal precipitation probabilities are larger (>40%) for portions of the Southeast and along the Gulf Coast.” Source: CPC 6-10 / 8-14 Day Outlook Discussion (opens in a new tab)
Active NWS alerts: Coastal Flood Advisory: 14 (FL, GA, SC, NC) · High Surf Advisory: 8 (FL, GA, NC) · Rip Current Statement: 8 (FL, GA, NC) · Coastal Flood Warning: 3 (NC) · Beach Hazards Statement: 2 (SC, NC) · Flood Warning: 2 (FL) · Coastal Flood Statement: 1 (FL) · Wind Advisory: 1 (NC)
U.S. Drought Monitor figures weren’t available for this update, for California; California; Arizona, New Mexico, Nevada and Utah; Texas, Louisiana, Mississippi and Alabama; Florida, Georgia, South Carolina and North Carolina.
Sources
30
- WPC Extended Forecast Discussion (PMDEPD) (opens in a new tab)Issued Sep 24, 2026, 1:00 PM PDT; fetched Sep 24, 2026, 5:03 PM PDT
- CPC 6-10 / 8-14 Day Outlook Discussion (PMDMRD) (opens in a new tab)Issued Sep 24, 2026, 12:02 PM PDT; fetched Sep 24, 2026, 5:03 PM PDT
- CPC U.S. Hazards Outlook (PMDTHR) (opens in a new tab)Issued Sep 24, 2026, 11:05 AM PDT; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — CA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — AZ (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — NM (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — NV (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — UT (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — TX (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — LA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — MS (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — AL (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — FL (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — GA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — SC (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- NWS active alerts — NC (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- CPC ENSO Diagnostic Discussion (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — CA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — AZ (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — NM (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — NV (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — UT (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — TX (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — LA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — MS (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — AL (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — FL (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — GA (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — SC (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT
- U.S. Drought Monitor — NC (opens in a new tab)Issue time not listed; fetched Sep 24, 2026, 5:03 PM PDT