Alert archive / Idaho / Tornado Warnings in 2003

Tornado Warning 3, NWS Pocatello, ID

April 28, 2003Power County, Idaho

NWS Pocatello, ID issued this tornado warning at Apr 28, 2003, 4:47 PM MDT for Power 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
Apr 28, 2003, 4:47 PM MDT (22:47 UTC)
Expired
Apr 28, 2003, 5:15 PM MDT
In force
28 min
Issued by
NWS Pocatello, ID
Area
Counties, with a storm outline in the text

County Power County, ID

The radar

The Pocatello radar (KSFX), 31 km from the middle of the area, began a volume at 22:46 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 10.8 hours before the alert went out and 238 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, Salt Lake City I, UT at 12:00Z on 2003-04-28Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2003-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 square meters per square second.19395878Sfc1 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
2050 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

261 
WFUS55 KPIH 282247
TORPIH
IDC077-282315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
445 PM MDT MON APR 28 2003

THE NATIONAL WEATHER SERVICE IN POCATELLO/IDAHO FALLS HAS CONTINUED A

* TORNADO WARNING FOR...
  CENTRAL POWER COUNTY IN IDAHO
  THIS INCLUDES THE CITY OF AMERICAN FALLS

* UNTIL 515 PM MDT

* AT 436 PM MDT...THE PUBLIC REPORTED A TORNADO OVER AMERICAN
  FALLS...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  ARBON VALLEY AT 505 PM MDT
  MICHAUD...2 MILES SOUTHEAST OF POCATELLO ARPT AT 510 PM MDT

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

THIS STORM HAS PRODUCED GOLF BALL SIZE HAIL.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4282 11291 4270 11276 4281 11242 4300 11259

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 3:30 PM MDTTornado WarningPIHMinidoka30 min
Apr 28, 3:54 PM MDTSevere Thunderstorm WarningPIHPower66 min
Apr 28, 4:06 PM MDTTornado WarningPIHPower39 min
Apr 28, 5:11 PM MDTTornado WarningPIHBannock, Bingham, Power34 min
Apr 28, 5:46 PM MDTSevere Thunderstorm WarningPIHBingham59 min

Nearby

Tornado Warnings in Idaho, 2003Every tornado warning in 2003Tornadoes in 2003

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.