Alert archive / Idaho / Tornado Warnings in 2020

Tornado Warning 2, NWS Pocatello, ID

April 30, 2020Cassia County, Oneida County, Power County, Idaho

NWS Pocatello, ID issued this tornado warning at Apr 30, 2020, 2:27 PM MDT for Cassia County, Oneida County, Power County, Idaho. It was in force for 48 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
Apr 30, 2020, 2:27 PM MDT (20:27 UTC)
Expired
Apr 30, 2020, 3:15 PM MDT
In force
48 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon
Tornado
Radar indicated
Hail
2.0 in

Counties Cassia County, ID, Oneida County, ID, Power County, ID

The radar

The Pocatello radar (KSFX), 99 km from the middle of the area, began a volume at 20:28 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 12:00Z, 8.5 hours before the alert went out and 181 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, Elko, NV at 12:00Z on 2020-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Elko, NV at 12:00Z on 2020-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1518 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

536 
WFUS55 KPIH 302027
TORPIH
IDC031-071-077-302115-
/O.NEW.KPIH.TO.W.0002.200430T2027Z-200430T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pocatello ID
227 PM MDT Thu Apr 30 2020

The National Weather Service in Pocatello has issued a

* Tornado Warning for...
  Northwestern Oneida County in southeastern Idaho...
  Southwestern Power County in southeastern Idaho...
  Southeastern Cassia County in southeastern Idaho...

* Until 315 PM MDT.
    
* At 226 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 14 miles east of Malta, moving east at 40 mph.

  HAZARD...Tornado and hail up to two inches in diameter. Wind gusts 
           up to 50 mph.

  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
  northwestern Oneida, southwestern Power and southeastern Cassia
  Counties, including the following locations... Idahome, Sublett
  Reservoir, Mt Harrison, Roy, Sweetzer Summit, Bridge and Massacre
  Rocks.

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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Pocatello.

&&

LAT...LON 4206 11313 4224 11388 4272 11290 4224 11238
TIME...MOT...LOC 2026Z 254DEG 53KT 4224 11309 

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

$$

Messick
2 follow-up statements
764 
WWUS55 KPIH 302052
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
252 PM MDT Thu Apr 30 2020

IDC031-071-077-302115-
/O.CON.KPIH.TO.W.0002.000000T0000Z-200430T2115Z/
Oneida ID-Power ID-Cassia ID-
252 PM MDT Thu Apr 30 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM MDT FOR
NORTHWESTERN ONEIDA...SOUTHWESTERN POWER AND SOUTHEASTERN CASSIA
COUNTIES...
    
At 252 PM MDT, a severe thunderstorm capable of producing a tornado
was located 11 miles north of Holbrook Summit, or 19 miles northwest
of Malad, moving east at 40 mph.

HAZARD...Tornado and two inch 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...
Malta, Oakley, Rockland, Elba, Juniper, Idahome, Sublett Reservoir,
Mt Harrison, Roy, Sweetzer Summit, Bridge and Massacre Rocks.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4206 11313 4224 11388 4272 11290 4224 11238
TIME...MOT...LOC 2052Z 254DEG 53KT 4233 11259 

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

$$

Messick
719 
WWUS55 KPIH 302111
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
311 PM MDT Thu Apr 30 2020

IDC031-071-077-302121-
/O.EXP.KPIH.TO.W.0002.000000T0000Z-200430T2115Z/
Oneida ID-Power ID-Cassia ID-
311 PM MDT Thu Apr 30 2020

...THE TORNADO WARNING FOR NORTHWESTERN ONEIDA...SOUTHWESTERN POWER
AND SOUTHEASTERN CASSIA COUNTIES WILL EXPIRE AT 315 PM MDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning will be allowed to expire.  However hail and 
gusty winds are still possible with this thunderstorm.

LAT...LON 4206 11313 4224 11388 4272 11290 4224 11238
TIME...MOT...LOC 2111Z 254DEG 53KT 4238 11232 

$$

Messick

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 11:58 AM MDTSpecial Weather StatementPIHBannock, Bonneville, Oneida92 min
Apr 30, 11:59 AM MDTSpecial Weather StatementPIHBannock, Bonneville, Oneida91 min
Apr 30, 12:23 PM MDTSpecial Weather StatementPIHCuster97 min
Apr 30, 1:22 PM MDTSevere Thunderstorm WarningPIHCassia53 min
Apr 30, 1:32 PM MDTSpecial Weather StatementPIHButte88 min
Apr 30, 1:46 PM MDTTornado WarningPIHCassia44 min
Apr 30, 1:50 PM MDTSpecial Weather StatementPIHFremont85 min
Apr 30, 2:55 PM MDTTornado WarningPIHFranklin, Oneida50 min
Apr 30, 3:37 PM MDTSpecial Weather StatementPIHLincoln53 min
Apr 30, 3:44 PM MDTSevere Thunderstorm WarningPIHFranklin, Oneida46 min
Apr 30, 3:57 PM MDTSevere Thunderstorm WarningPIHLincoln48 min
Apr 30, 4:09 PM MDTTornado WarningPIHLincoln20 min
Apr 30, 4:29 PM MDTSpecial Weather StatementPIHFranklin91 min
Apr 30, 4:29 PM MDTSevere Thunderstorm WarningPIHBlaine, Lincoln46 min
Apr 30, 4:39 PM MDTSevere Thunderstorm WarningPIHBlaine, Lincoln, Minidoka, Power51 min
Apr 30, 4:47 PM MDTSevere Thunderstorm WarningPIHClark28 min
Apr 30, 5:01 PM MDTSpecial Weather StatementPIHButte44 min
Apr 30, 5:16 PM MDTSpecial Weather StatementPIHClark44 min
Apr 30, 5:17 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Blaine, Power43 min
Apr 30, 5:17 PM MDTSevere Thunderstorm WarningPIHBlaine, Cassia, Minidoka, Power43 min
Apr 30, 5:46 PM MDTSevere Thunderstorm WarningPIHBingham, Butte, Clark, Custer, Jefferson44 min
Apr 30, 5:55 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville50 min
Apr 30, 5:59 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Blaine, Cassia, Power46 min

Nearby

Tornado Warnings in Idaho, 2020Every tornado warning in 2020Tornadoes in 2020

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.