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Home Return to list Areal Flood Advisory 0006 Issued by the Boise Forecast Office
Action: New Issued At: 2026-09-18 10:51:17
306
WGUS85 KBOI 181550
FLSBOI
Flood Advisory
National Weather Service Boise ID
950 AM MDT Fri Sep 18 2026
.Training storms are producing localized heavy rainfall within the
advisory area.
IDC039-047-073-083-181745-
/O.NEW.KBOI.FA.Y.0006.260918T1550Z-260918T1745Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elmore ID-Gooding ID-Owyhee ID-Twin Falls ID-
950 AM MDT Fri Sep 18 2026
...FLOOD ADVISORY IN EFFECT UNTIL 1145 AM MDT THIS MORNING...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Northwestern Gooding County in south central Idaho...
Northwestern Twin Falls County in south central Idaho...
Southeastern Elmore County in southwestern Idaho...
East Central Owyhee County in southwestern Idaho...
* WHEN...Until 1145 AM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 949 AM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1.5 inches of rain
have fallen.
- Some locations that will experience flooding include...
Glenns Ferry, Deadman Flat, King Hill, Twentymile Butte, Blair
Trail Reservoir and White Arrow Hot Spring.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4270 11504 4269 11504 4270 11546 4307 11544
4309 11492
$$
JDS
Action: Time Extended Issued At: 2026-09-18 12:28:20
550
WGUS85 KBOI 181727
FLSBOI
Flood Advisory
National Weather Service Boise ID
1127 AM MDT Fri Sep 18 2026
IDC039-047-073-083-181845-
/O.EXT.KBOI.FA.Y.0006.000000T0000Z-260918T1845Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elmore ID-Gooding ID-Owyhee ID-Twin Falls ID-
1127 AM MDT Fri Sep 18 2026
...FLOOD ADVISORY NOW IN EFFECT UNTIL 1245 PM MDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Northwestern Gooding County in south central Idaho...
Northwestern Twin Falls County in south central Idaho...
Southeastern Elmore County in southwestern Idaho...
East Central Owyhee County in southwestern Idaho...
* WHEN...Until 1245 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 1127 AM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 2 inches of rain
have fallen.
- Some locations that will experience flooding include...
Glenns Ferry, Deadman Flat, King Hill, Twentymile Butte, Blair
Trail Reservoir and White Arrow Hot Spring.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4270 11504 4269 11504 4270 11546 4307 11544
4309 11492
$$
JDS
Action: Time Extended Issued At: 2026-09-18 13:25:51
123
WGUS85 KBOI 181825
FLSBOI
Flood Advisory
National Weather Service Boise ID
1225 PM MDT Fri Sep 18 2026
IDC039-047-073-083-182045-
/O.EXT.KBOI.FA.Y.0006.000000T0000Z-260918T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elmore ID-Gooding ID-Owyhee ID-Twin Falls ID-
1225 PM MDT Fri Sep 18 2026
...FLOOD ADVISORY NOW IN EFFECT UNTIL 245 PM MDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Northwestern Gooding County in south central Idaho...
Northwestern Twin Falls County in south central Idaho...
Southeastern Elmore County in southwestern Idaho...
East Central Owyhee County in southwestern Idaho...
* WHEN...Until 245 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 1225 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 2 inches of rain
have fallen.
- Additional rainfall amounts of 0.5 to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Glenns Ferry, Deadman Flat, King Hill, Twentymile Butte, Blair
Trail Reservoir and White Arrow Hot Spring.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4270 11504 4269 11504 4270 11546 4307 11544
4309 11492
$$
JDS
Action: Expired Issued At: 2026-09-18 15:37:25
822
WGUS85 KBOI 182036
FLSBOI
Flood Advisory
National Weather Service Boise ID
236 PM MDT Fri Sep 18 2026
IDC039-047-073-083-182046-
/O.EXP.KBOI.FA.Y.0006.000000T0000Z-260918T2045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elmore ID-Gooding ID-Owyhee ID-Twin Falls ID-
236 PM MDT Fri Sep 18 2026
...FLOOD ADVISORY WILL EXPIRE AT 245 PM MDT THIS AFTERNOON...
The Flood Advisory will expire at 245 PM MDT this afternoon for
portions of south central and southwest Idaho, including the
following areas, in south central Idaho, Gooding and Twin Falls. In
southwest Idaho, Elmore and Owyhee.
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 1200 AM MDT Saturday for
portions of south central and southwest Idaho...
&&
LAT...LON 4270 11504 4269 11504 4270 11546 4307 11544
4309 11492
$$
JDS
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