Alert archive / Idaho / Tornado Warnings in 2017

Tornado Warning 2, NWS Pocatello, ID

June 11, 2017Clark County, Fremont County, Idaho

NWS Pocatello, ID issued this tornado warning at Jun 11, 2017, 9:17 PM MDT for Clark County, Fremont County, Idaho. It was in force for 28 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: Jun 11, 2017, 9:17 PM MDT (03:17 UTC)
Expired: Jun 11, 2017, 9:45 PM MDT
In force: 28 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Clark County, ID, Fremont County, ID

The radar

The Pocatello radar (KSFX), 133 km from the middle of the area, began a volume at 03:20 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

Riverton, WY (KRIW), launched 00:00Z, 3.3 hours before the alert went out and 306 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: 1 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 377 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

776 
WFUS55 KPIH 120317
TORPIH
IDC033-043-120345-
/O.NEW.KPIH.TO.W.0002.170612T0317Z-170612T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pocatello ID
917 PM MDT SUN JUN 11 2017

The National Weather Service in Pocatello has issued a

* Tornado Warning for...
  Southwestern Fremont County in southeastern Idaho...
  Southeastern Clark County in southeastern Idaho...

* Until 945 PM MDT
    
* At 916 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 12 miles northwest of Egin, or 14 miles southeast of
  Dubois, moving north at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Idmon and Kilgore around 945 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4398 11188 4403 11210 4443 11199 4435 11162
TIME...MOT...LOC 0316Z 194DEG 29KT 4409 11196 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Hedges

2 follow-up statements

732 
WWUS55 KPIH 120337
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
937 PM MDT SUN JUN 11 2017

IDC033-043-120345-
/O.CON.KPIH.TO.W.0002.000000T0000Z-170612T0345Z/
Fremont ID-Clark ID-
937 PM MDT SUN JUN 11 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR WEST
CENTRAL FREMONT AND EAST CENTRAL CLARK COUNTIES...
    
At 936 PM MDT, a severe thunderstorm capable of producing a tornado
was located 10 miles south of Idmon, moving north at 30 mph.

HAZARD...Tornado and quarter size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Idmon around 945 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4412 11178 4418 11200 4442 11193 4438 11174
      4434 11163
TIME...MOT...LOC 0336Z 201DEG 28KT 4423 11185 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Hedges

834 
WWUS55 KPIH 120346
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
946 PM MDT SUN JUN 11 2017

IDC033-043-120355-
/O.EXP.KPIH.TO.W.0002.000000T0000Z-170612T0345Z/
Fremont ID-Clark ID-
946 PM MDT SUN JUN 11 2017

...THE TORNADO WARNING FOR WEST CENTRAL FREMONT AND EAST CENTRAL
CLARK COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4412 11178 4418 11200 4442 11193 4438 11174
      4434 11163
TIME...MOT...LOC 0345Z 194DEG 29KT 4428 11183 

$$

Hedges

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 6:20 PM MDT	Special Weather Statement	PIH	Bingham	40 min
Jun 11, 6:29 PM MDT	Special Weather Statement	PIH	Blaine	46 min
Jun 11, 7:13 PM MDT	Special Weather Statement	PIH	Blaine	47 min
Jun 11, 7:15 PM MDT	Special Weather Statement	PIH	Bingham	45 min
Jun 11, 8:02 PM MDT	Severe Thunderstorm Warning	PIH	Blaine	22 min
Jun 11, 8:11 PM MDT	Special Weather Statement	PIH	Jefferson	49 min
Jun 11, 8:22 PM MDT	Special Weather Statement	PIH	Custer	38 min
Jun 11, 8:26 PM MDT	Severe Thunderstorm Warning	PIH	Blaine, Custer	34 min
Jun 11, 8:34 PM MDT	Severe Thunderstorm Warning	PIH	Clark, Fremont, Jefferson, Madison	41 min
Jun 11, 8:52 PM MDT	Tornado Warning	PIH	Clark, Fremont, Jefferson, Madison	23 min
Jun 12, 10:04 AM MDT	Special Weather Statement	PIH	Clark	26 min
Jun 12, 10:23 AM MDT	Severe Thunderstorm Warning	PIH	Butte, Clark, Jefferson	33 min
Jun 12, 10:40 AM MDT	Severe Thunderstorm Warning	PIH	Bingham, Bonneville, Jefferson	39 min
Jun 12, 10:55 AM MDT	Severe Thunderstorm Warning	PIH	Clark, Jefferson	50 min
Jun 12, 12:18 PM MDT	Special Weather Statement	PIH	Bonneville, Clark, Fremont, Madison	42 min
Jun 12, 12:31 PM MDT	Severe Thunderstorm Warning	PIH	Clark	31 min
Jun 12, 1:10 PM MDT	Special Weather Statement	PIH	Fremont, Teton	50 min
Jun 12, 1:37 PM MDT	Wind Advisory	PIH		29 hr
Jun 12, 2:19 PM MDT	Special Weather Statement	PIH	Fremont, Teton	56 min
Jun 12, 2:32 PM MDT	Special Weather Statement	PIH	Butte, Clark, Jefferson, Madison	58 min
Jun 12, 5:38 PM MDT	River Flood Warning	PIH	Bonneville, Jefferson, Madison	4 days

Nearby

Tornado Warnings in Idaho, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.