Alert archive / Idaho / Wind Advisories in 2021
Wind Advisory 1, NWS Boise, ID
NWS Boise, ID issued this wind advisory at Jan 27, 2021, 5:02 AM MST for 6 counties in Idaho. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jan 27, 2021, 5:02 AM MST (12:02 UTC)
- Expired
- Jan 27, 2021, 5:00 PM MST
- In force
- 12 hr
- Issued by
- NWS Boise, ID
Counties Ada County, ID, Elmore County, ID, Gooding County, ID, Jerome County, ID, Owyhee County, ID, Twin Falls County, ID
The radar
The Boise radar (KCBX), 102 km from the middle of the area, began a volume at 12:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 0.0 hours before the alert went out and 106 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1698 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 521 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
641 WWUS75 KBOI 271202 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 502 AM MST Wed Jan 27 2021 IDZ014-016-272015- /O.NEW.KBOI.WI.Y.0001.210127T1202Z-210128T0000Z/ Upper Treasure Valley-Western Magic Valley- 502 AM MST Wed Jan 27 2021 ...WIND ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...East to southeast winds 25 to 35 mph, with gusts of 45 to 50 mph expected. * WHERE...Upper Treasure Valley and Western Magic Valley. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Travel may be difficult for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
3 follow-up statements
596 WWUS75 KBOI 271219 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 519 AM MST Wed Jan 27 2021 IDZ014-016-280000- /O.CON.KBOI.WI.Y.0001.000000T0000Z-210128T0000Z/ Upper Treasure Valley-Western Magic Valley- 519 AM MST Wed Jan 27 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...East to southeast winds 25 to 35 mph, with gusts of 45 to 50 mph expected. * WHERE...Upper Treasure Valley and Western Magic Valley. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Travel may be difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
153 WWUS75 KBOI 271739 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 1039 AM MST Wed Jan 27 2021 IDZ030-280145- /O.NEW.KBOI.HW.W.0001.210127T1739Z-210128T0600Z/ Southern Twin Falls County- 1039 AM MST Wed Jan 27 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...South winds 40 to 50 mph with gusts up to 65 mph. * WHERE...Southern Twin Falls County. * WHEN...Until 11 PM MST this evening. * IMPACTS...Damaging winds may blow down trees and power lines. Widespread power outages are possible. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Wind gusts to 69 mph have been reported in the higher terrain east of Highway 93 (Trail Gulch RAWS). Also, gusts to 63 mph were reported at the Twin Falls Airport. These winds are expected to continue, although perhaps not quite this strong, through the evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ IDZ014-016-280000- /O.CON.KBOI.WI.Y.0001.000000T0000Z-210128T0000Z/ Upper Treasure Valley-Western Magic Valley- 1039 AM MST Wed Jan 27 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...East to south winds 25 to 35 mph, with gusts of 45 to 50 mph expected. Isolated gusts to 60 mph near the Twin Falls Airport may continue for the next few hours. However, for the vast majority of the zone, wind speeds were significantly lower. Therefore the advisory will be allowed to remain in place. Stronger winds were occurring in southern Twin Falls County where a High Wind Warning has been issued (see above). * WHERE...Upper Treasure Valley and Western Magic Valley. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Travel may be difficult. * ADDITIONAL DETAILS...Gusts to 63 mph were reported at the Twin Falls Airport. These winds are expected to continue, although perhaps not quite this strong, through the afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
618 WWUS75 KBOI 272351 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 451 PM MST Wed Jan 27 2021 IDZ014-016-280100- /O.EXP.KBOI.WI.Y.0001.000000T0000Z-210128T0000Z/ Upper Treasure Valley-Western Magic Valley- 451 PM MST Wed Jan 27 2021 ...WIND ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Winds across the Upper Treasure Valley and Western Magic Valley have weakened. A few gusts to 45 mph will remain possible, but widespread significant wind is no longer expected. $$ IDZ030-280600- /O.CON.KBOI.HW.W.0001.000000T0000Z-210128T0600Z/ Southern Twin Falls County- 451 PM MST Wed Jan 27 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...South winds 40 to 50 mph with gusts up to 65 mph. * WHERE...Southern Twin Falls County. * WHEN...Until 11 PM MST this evening. * IMPACTS...Damaging winds may blow down trees and power lines. Widespread power outages are possible. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Wind gusts to 69 mph have been reported in the higher terrain east of Highway 93 (Trail Gulch RAWS). Also, gusts to 63 mph were reported at the Twin Falls Airport. These winds are expected to continue, although perhaps not quite this strong, through the evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 27, 10:39 AM MST | High Wind Warning | BOI | Twin Falls | 8 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.