Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Boise, ID
NWS Boise, ID issued this severe thunderstorm warning at Jun 22, 2021, 6:40 PM MDT for Ada County, Canyon County, Owyhee County, Idaho; Malheur County, Oregon. It was in force for 50 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 22, 2021, 6:40 PM MDT (00:40 UTC)
- Expired
- Jun 22, 2021, 7:30 PM MDT
- In force
- 50 min
- Issued by
- NWS Boise, ID
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Ada County, ID, Canyon County, ID, Owyhee County, ID, Malheur County, OR
The radar
The Boise radar (KCBX), 72 km from the middle of the area, began a volume at 00:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 22, 7:20 PM MDT | TSTM WND GST 54 | 4 Nw Nampa, ID | AWOS STATION KEUL CALDWELL. |
| Jun 22, 7:30 PM MDT | TSTM WND DMG | 1 E Greenleaf, ID | BLUE SPRUCE TREE 50 FT TALL UPROOTED IN THUNDERSTORM OUTFLOW. |
| Jun 22, 7:33 PM MDT | TSTM WND DMG | Wilder, ID | 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Jun 22, 7:37 PM MDT | TSTM WND GST 50 | 3 Se Parma, ID | MESONET STATION UP228 2.9 SE PARMA (UPR). |
| Jun 22, 7:38 PM MDT | TSTM WND GST 49 | 3 Ne Nampa, ID | MESONET STATION EW5072 NAMPA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 00:00Z, 0.7 hours before the alert went out and 74 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
- 505 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 3069 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 398 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted.
843 WUUS55 KBOI 230040 SVRBOI IDC001-027-073-ORC045-230130- /O.NEW.KBOI.SV.W.0007.210623T0040Z-210623T0130Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Boise ID 640 PM MDT Tue Jun 22 2021 The National Weather Service in Boise has issued a * Severe Thunderstorm Warning for... West central Ada County in southwestern Idaho... Canyon County in southwestern Idaho... Northwestern Owyhee County in southwestern Idaho... East central Malheur County in southeastern Oregon... * Until 730 PM MDT.. * At 639 PM MDT, severe thunderstorms were located along a line extending from near Freezeout Mountain to near Elephant Butte, moving northeast at 30 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... Homedale, Elephant Butte and Succor Creek Campground around 640 PM MDT. Marsing, Wilder and Givens Hot Springs around 650 PM MDT. Greenleaf, Notus, Lake Lowell and Huston around 700 PM MDT. Caldwell, Sand Hollow and Board Corral Mountain around 710 PM MDT. Nampa, Kuna, Double Mountain and Owyhee Dam around 720 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. && LAT...LON 4387 11732 4361 11630 4332 11676 4359 11783 TIME...MOT...LOC 0039Z 238DEG 25KT 4361 11766 4343 11680 HAIL...0.75IN WIND...60MPH $$ SP
1 follow-up statement
276 WWUS55 KBOI 230130 SVSBOI Severe Weather Statement National Weather Service Boise ID 730 PM MDT Tue Jun 22 2021 IDC001-027-073-ORC045-230139- /O.EXP.KBOI.SV.W.0007.000000T0000Z-210623T0130Z/ Ada ID-Canyon ID-Owyhee ID-Malheur OR- 730 PM MDT Tue Jun 22 2021 ...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL ADA...CANYON... NORTHWESTERN OWYHEE AND EAST CENTRAL MALHEUR COUNTIES WILL EXPIRE AT 730 PM MDT... The winds from the storm which prompted the warning have weakened slightly. Therefore, the warning will be allowed to expire. However gusty winds are still possible with these thunderstorms, and blowing dust continues to be a problem. A dust storm warning is in effect in nearby areas. Please use caution when traveling. When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. LAT...LON 4387 11732 4361 11630 4332 11676 4359 11783 TIME...MOT...LOC 0129Z 238DEG 25KT 4378 11728 4360 11642 $$ SP
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 6:08 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 36 min |
| Jun 22, 7:14 PM MDT | Dust Storm Warning | BOI | Ada, Boise, Canyon, Gem, Payette | 31 min |
| Jun 22, 7:35 PM MDT | Dust Storm Warning | BOI | Ada, Elmore, Owyhee | 55 min |
| Jun 22, 7:45 PM MDT | Dust Storm Warning | BOI | Adams, Boise, Camas, Elmore, Gem, Payette and 2 more | 90 min |
| Jun 22, 7:55 PM MDT | Special Weather Statement | BOI | Ada, Canyon, Payette | 50 min |
| Jun 22, 8:36 PM MDT | High Wind Warning | BOI | Ada, Adams, Boise, Camas, Canyon, Elmore and 8 more | 3 hr |
| Jun 22, 9:16 PM MDT | Special Weather Statement | BOI | Adams | 59 min |
| Jun 22, 9:35 PM MDT | Special Weather Statement | BOI | Valley | 40 min |
| Jun 22, 10:46 PM MDT | Special Weather Statement | BOI | Adams | 59 min |
| Jun 23, 8:07 AM MDT | Red Flag Warning | BOI | Owyhee, Twin Falls | 14 hr |
| Jun 23, 2:33 PM MDT | Excessive Heat Watch | BOI | Ada, Adams, Boise, Camas, Canyon, Elmore and 8 more | 24 hr |
| Jun 23, 4:56 PM MDT | Special Weather Statement | BOI | Owyhee | 34 min |
| Jun 23, 5:18 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 42 min |
| Jun 23, 4:22 PM MDT | Special Weather Statement | BOI | Malheur | 23 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2021Severe Thunderstorm Warnings in Oregon, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.