Alert archive / Idaho / Tornado Warnings in 2017

Tornado Warning 1, NWS Pocatello, ID

June 11, 20174 counties in Idaho

NWS Pocatello, ID issued this tornado warning at Jun 11, 2017, 8:52 PM MDT for 4 counties in Idaho. It was in force for 23 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, 8:52 PM MDT (02:52 UTC)
Expired
Jun 11, 2017, 9:15 PM MDT
In force
23 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon
Tornado
Radar indicated
Hail
2.0 in

Counties Clark County, ID, Fremont County, ID, Jefferson County, ID, Madison County, ID

The radar

The Pocatello radar (KSFX), 115 km from the middle of the area, began a volume at 02:55 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, 2.9 hours before the alert went out and 307 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-pSkew-T log-p diagram, Riverton, WY at 00:00Z on 2017-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2017-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

609 
WFUS55 KPIH 120252
TORPIH
IDC033-043-051-065-120315-
/O.NEW.KPIH.TO.W.0001.170612T0252Z-170612T0315Z/

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

The National Weather Service in Pocatello has issued a

* Tornado Warning for...
  Southwestern Fremont County in southeastern Idaho...
  North central Jefferson County in southeastern Idaho...
  Northwestern Madison County in southeastern Idaho...
  Southeastern Clark County in southeastern Idaho...

* Until 915 PM MDT
    
* At 851 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles east of Hamer, or 14 miles northwest of
  Rexburg, moving northeast at 30 mph.

  HAZARD...Tornado and hail up to two inches in diameter. 

  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 tornadic thunderstorm will remain over mainly rural areas of
  southwestern Fremont...north central Jefferson...northwestern
  Madison and southeastern Clark Counties, including the following
  locations: southern Saint Anthony Sand Dunes.

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 4384 11200 4392 11221 4427 11200 4417 11169
TIME...MOT...LOC 0251Z 208DEG 27KT 4394 11203 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

Hedges
1 follow-up statement
402 
WWUS55 KPIH 120308
SVSPIH

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

IDC033-043-051-065-120315-
/O.CON.KPIH.TO.W.0001.000000T0000Z-170612T0315Z/
Fremont ID-Jefferson ID-Madison ID-Clark ID-
908 PM MDT SUN JUN 11 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
SOUTHWESTERN FREMONT...NORTH CENTRAL JEFFERSON...NORTHWESTERN MADISON
AND SOUTHEASTERN CLARK COUNTIES...
    
At 908 PM MDT, a severe thunderstorm capable of producing a tornado
was located 8 miles northwest of Egin, or 15 miles northwest of
Rexburg, moving northeast at 25 mph.

HAZARD...Tornado and half dollar 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. 

Locations impacted include...
Southern Saint Anthony Sand Dunes.

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 4392 11196 4404 11211 4426 11196 4417 11169
TIME...MOT...LOC 0308Z 210DEG 23KT 4401 11196 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Hedges

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 6:20 PM MDTSpecial Weather StatementPIHBingham40 min
Jun 11, 6:29 PM MDTSpecial Weather StatementPIHBlaine46 min
Jun 11, 7:13 PM MDTSpecial Weather StatementPIHBlaine47 min
Jun 11, 7:15 PM MDTSpecial Weather StatementPIHBingham45 min
Jun 11, 8:02 PM MDTSevere Thunderstorm WarningPIHBlaine22 min
Jun 11, 8:11 PM MDTSpecial Weather StatementPIHJefferson49 min
Jun 11, 8:22 PM MDTSpecial Weather StatementPIHCuster38 min
Jun 11, 8:26 PM MDTSevere Thunderstorm WarningPIHBlaine, Custer34 min
Jun 11, 8:34 PM MDTSevere Thunderstorm WarningPIHClark, Fremont, Jefferson, Madison41 min
Jun 11, 9:17 PM MDTTornado WarningPIHClark, Fremont28 min
Jun 12, 10:04 AM MDTSpecial Weather StatementPIHClark26 min
Jun 12, 10:23 AM MDTSevere Thunderstorm WarningPIHButte, Clark, Jefferson33 min
Jun 12, 10:40 AM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Jefferson39 min
Jun 12, 10:55 AM MDTSevere Thunderstorm WarningPIHClark, Jefferson50 min
Jun 12, 12:18 PM MDTSpecial Weather StatementPIHBonneville, Clark, Fremont, Madison42 min
Jun 12, 12:31 PM MDTSevere Thunderstorm WarningPIHClark31 min
Jun 12, 1:10 PM MDTSpecial Weather StatementPIHFremont, Teton50 min
Jun 12, 1:37 PM MDTWind AdvisoryPIH29 hr
Jun 12, 2:19 PM MDTSpecial Weather StatementPIHFremont, Teton56 min
Jun 12, 2:32 PM MDTSpecial Weather StatementPIHButte, Clark, Jefferson, Madison58 min
Jun 12, 5:38 PM MDTRiver Flood WarningPIHBonneville, Jefferson, Madison4 days

Nearby

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