Alert archive / Idaho / Special Weather Statements in 2021

Special Weather Statement, NWS Pocatello, ID

July 21, 2021Bingham County, Power County, Idaho

NWS Pocatello, ID issued this special weather statement at Jul 21, 2021, 9:46 PM MDT for Bingham County, Power County, Idaho. It was in force for 59 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 21, 2021, 9:46 PM MDT (03:46 UTC)
Expired: Jul 21, 2021, 10:45 PM MDT
In force: 59 min
Issued by: NWS Pocatello, ID

Counties Bingham County, ID, Power County, ID

The radar

The Pocatello radar (KSFX), 43 km from the middle of the area, began a volume at 03:49 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

Elko, NV (KLKN), launched 00:00Z, 3.8 hours before the alert went out and 236 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 67 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 3518 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pocatello, ID wrote its last area forecast discussion before this special weather statement went out at Jul 21, 8:50 PM MDT, 56 minutes earlier.

Area forecast discussion, Jul 21, 8:50 PM MDT, 56 minutes before

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In the hours before

Special weather statement, Jul 21, 5:14 PM MDT, 4 hours 32 minutes before

Special Weather Statement
National Weather Service Pocatello ID
514 PM MDT Wed Jul 21 2021

IDZ073-075-220000-
Wood River Foothills ID-Sun Valley Region ID-
514 PM MDT Wed Jul 21 2021

...THUNDERSTORM NORTHEAST OF FAIRFIELD MOVING NORTHEAST TOWARD
KETCHUM THROUGH 600 PM MDT...

At 512 PM MDT, Doppler radar was tracking a thunderstorm 7 miles
northeast of Fairfield, moving northeast at 30 mph.

Brief heavy rain and wind gusts to 40 mph are possible with this
storm as it moves northeast into Ketchum around 600 PM MDT.

Locations impacted include...
Hailey, Ketchum and Sun Valley.

LAT...LON 4383 11447 4368 11416 4335 11453 4340 11453
      4340 11455 4343 11455 4346 11451 4348 11451
      4349 11452 4349 11453 4351 11457 4352 11458
      4353 11460 4356 11459 4357 11463 4360 11466
TIME...MOT...LOC 2312Z 214DEG 27KT 4340 11466

Huston

Special weather statement, Jul 21, 5:19 PM MDT, 4 hours 27 minutes before

Special Weather Statement
National Weather Service Pocatello ID
519 PM MDT Wed Jul 21 2021

IDZ054-055-057-058-220015-
Eastern Magic Valley ID-Marsh and Arbon Highlands ID-
Raft River Region ID-Lower Snake River Plain ID-
519 PM MDT Wed Jul 21 2021

...THUNDERSTORM NEAR NEELEY MOVING NORTHEAST TOWARD AMERICAN FALLS
THROUGH 615 PM MDT...

At 516 PM MDT, Doppler radar was tracking a thunderstorm near
Neeley, moving northeast along the southern periphery of
Interstate 86 at 10 mph.

Brief heavy rain and wind gusts to 40 mph are possible with this
storm as it moves northeast toward American Falls through 615 PM
MDT. Fire crews working the Lusk Fire may also experience northerly
outflow winds as this system passes by to the north.

Locations impacted include...
American Falls, Neeley, western American Falls Reservoir, Rockland,
Fort Hall Bannock Creek Lodge and Massacre Rocks.

LAT...LON 4253 11291 4265 11309 4294 11282 4276 11254
TIME...MOT...LOC 2316Z 222DEG 11KT 4265 11294

Huston

Special weather statement, Jul 21, 6:31 PM MDT, 3 hours 15 minutes before

Special Weather Statement
National Weather Service Pocatello ID
631 PM MDT Wed Jul 21 2021

IDZ055-056-220130-
Eastern Magic Valley ID-Southern Hills/Albion Mountains ID-
631 PM MDT Wed Jul 21 2021

...LINE OF WEAK THUNDERSTORMS DEVELOPING OVER THE MAGIC MOUNTAIN
REGION MOVING NORTH-NORTHEAST TOWARD OAKLEY AND BURLEY THROUGH 725
PM MDT...

At 625 PM MDT, Doppler radar was tracking a line of weak
thunderstorms extending from 9 miles southeast of Hazelton to 7
miles west of Oakley Reservoir to 21 miles southwest of Oakley.
This line was moving northeast at 25 mph.

Light rain, occasional lightning, and wind gusts to 30 mph are
possible with these storms as they move northeast toward Oakley and
Burley through 725 PM MDT. Fire crews working the South Carson Fire
should be prepared for northerly outflow winds through 725 PM MDT.

Locations impacted include...
Burley, Rupert, Heyburn, Oakley Reservoir, Paul and Oakley.

LAT...LON 4199 11415 4220 11413 4252 11402 4253 11399
      4254 11393 4263 11393 4289 11355 4213 11378
      4199 11398
TIME...MOT...LOC 0025Z 211DEG 22KT 4252 11398 4220 11408 4199 11412

Huston

Special weather statement, Jul 21, 7:55 PM MDT, 1 hour 51 minutes before

Special Weather Statement
National Weather Service Pocatello ID
755 PM MDT Wed Jul 21 2021

IDZ055-056-220245-
Eastern Magic Valley ID-Southern Hills/Albion Mountains ID-
755 PM MDT Wed Jul 21 2021

...THUNDERSTORMS SOUTH OF OAKLEY RESERVOIR ON THE UTAH BORDER MOVING
NORTHEAST TOWARD THE SOUTH CARSON FIRE AND THE CITY OF ROCKS THROUGH
845 PM MDT...

At 750 PM MDT, Doppler radar was tracking a thunderstorms south of
the Oakley Reservoir near the Utah border, moving northeast at 10
mph.

Brief moderate rain, occasional lightning, and wind gusts to 40 mph
are possible with these storms as they lift northeast toward the
South Carson Fire and the City of Rocks. Fire personnel working on
the South Carson Fire should be prepared for strong winds gusts from
the southwest and moderate rain sometime after 830 PM through 900 PM
MDT.

Locations impacted include...
Oakley Reservoir, Oakley and City Of Rocks.

LAT...LON 4199 11408 4229 11398 4214 11363 4199 11379
TIME...MOT...LOC 0150Z 209DEG 9KT 4201 11399

Huston

Special weather statement, Jul 21, 8:10 PM MDT, 1 hour 36 minutes before

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Special weather statement, Jul 21, 9:46 PM MDT, 0 minutes before

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The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 6:31 PM MDT	Special Weather Statement	PIH	Cassia	59 min
Jul 21, 7:55 PM MDT	Special Weather Statement	PIH	Cassia	50 min
Jul 21, 8:10 PM MDT	Special Weather Statement	PIH	Bingham	65 min
Jul 22, 2:00 AM MDT	Red Flag Warning	PIH	Bannock, Bear Lake, Bonneville, Butte, Caribou, Cassia and 12 more	19 hr
Jul 22, 10:36 AM MDT	Special Weather Statement	PIH	Power	39 min
Jul 22, 1:46 PM MDT	Special Weather Statement	PIH	Oneida	59 min
Jul 22, 2:37 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Oneida, Power	38 min
Jul 22, 3:07 PM MDT	Special Weather Statement	PIH	Oneida	38 min
Jul 22, 3:11 PM MDT	Special Weather Statement	PIH	Oneida	34 min
Jul 22, 3:18 PM MDT	Special Weather Statement	PIH	Bonneville	12 min
Jul 22, 3:24 PM MDT	Special Weather Statement	PIH	Cassia	36 min
Jul 22, 3:39 PM MDT	Special Weather Statement	PIH	Bannock	51 min
Jul 22, 3:50 PM MDT	Special Weather Statement	PIH	Oneida	55 min
Jul 22, 4:09 PM MDT	Special Weather Statement	PIH	Power	51 min
Jul 22, 4:45 PM MDT	Special Weather Statement	PIH	Oneida, Power	60 min
Jul 22, 5:07 PM MDT	Special Weather Statement	PIH	Caribou	53 min
Jul 22, 5:14 PM MDT	Special Weather Statement	PIH	Franklin	46 min
Jul 22, 5:47 PM MDT	Special Weather Statement	PIH	Bear Lake, Caribou, Franklin	88 min

Nearby

Special Weather Statements in Idaho, 2021 Every 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.