Alert archive / Idaho / Special Weather Statements in 2021
Special Weather Statement, NWS Pocatello, ID
NWS Pocatello, ID issued this special weather statement at Jul 20, 2021, 2:21 PM MDT for Butte County, Idaho. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2021, 2:21 PM MDT (20:21 UTC)
- Expired
- Jul 20, 2021, 3:15 PM MDT
- In force
- 54 min
- Issued by
- NWS Pocatello, ID
County Butte County, ID
The radar
The Pocatello radar (KSFX), 88 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 231 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
- 145 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 2278 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
168 WWUS85 KPIH 202021 SPSPIH Special Weather Statement National Weather Service Pocatello ID 221 PM MDT Tue Jul 20 2021 IDZ052-068-069-202115- Arco/Mud Lake Desert ID-Lost River Range ID-Lost River Valleys ID- 221 PM MDT Tue Jul 20 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CUSTER AND CENTRAL BUTTE COUNTIES UNTIL 315 PM MDT... At 221 PM MDT, Doppler radar was tracking a strong thunderstorm near Darlington, or 10 miles north of Arco, moving east at 20 mph. Dime size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Darlington and Moore. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4369 11356 4388 11351 4382 11300 4362 11303 TIME...MOT...LOC 2021Z 274DEG 17KT 4377 11336 $$ GK
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:32 PM MDT | Special Weather Statement | PIH | Bear Lake | 43 min |
| Jul 20, 1:23 PM MDT | Special Weather Statement | PIH | Butte | 67 min |
| Jul 20, 2:06 PM MDT | Special Weather Statement | PIH | Cassia | 69 min |
| Jul 20, 2:16 PM MDT | Special Weather Statement | PIH | Power | 44 min |
| Jul 20, 2:51 PM MDT | Special Weather Statement | PIH | Caribou | 24 min |
| Jul 20, 2:53 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 37 min |
| Jul 20, 3:35 PM MDT | Special Weather Statement | PIH | Bonneville | 55 min |
| Jul 20, 4:09 PM MDT | Special Weather Statement | PIH | Caribou | 36 min |
| Jul 20, 4:34 PM MDT | Special Weather Statement | PIH | Bonneville, Teton | 56 min |
| Jul 20, 4:39 PM MDT | Special Weather Statement | PIH | Fremont, Madison | 51 min |
| Jul 20, 4:41 PM MDT | Special Weather Statement | PIH | Caribou | 34 min |
| Jul 20, 5:28 PM MDT | Special Weather Statement | PIH | Teton | 32 min |
| Jul 20, 5:35 PM MDT | Special Weather Statement | PIH | Fremont | 25 min |
Nearby
Special Weather Statements in Idaho, 2021Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.