Alert archive / Idaho / Tornado Warnings in 1996

Tornado Warning 2, NWS Pocatello, ID

June 14, 1996Jefferson County, Idaho

NWS Pocatello, ID issued this tornado warning at Jun 14, 1996, 7:50 PM MDT for Jefferson County, Idaho. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 14, 1996, 7:50 PM MDT (01:50 UTC)
Expired
Jun 14, 1996, 8:30 PM MDT
In force
40 min
Issued by
NWS Pocatello, ID
Area
Whole counties

County Jefferson County, ID

The radar

The Pocatello radar (KSFX), 85 km from the middle of the area, began a volume at 01:51 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

Boise Airport, ID (KBOI), launched 00:00Z, 1.8 hours before the alert went out and 314 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, Boise Airport, ID at 00:00Z on 1996-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 467 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 00:00Z on 1996-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939Sfc1 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
467 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
2586 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPIH 150152
TORPIH
IDC051-150230-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
750 PM MDT FRI JUN 14 1996
 
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 830 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST IDAHO
 
   ...SOUTH CENTRAL JEFFERSON COUNTY
 
AT 747 PM MDT...DOPPLER WEATHER RADAR INDICATED A POSSIBLE TORNADO 12
MILES SOUTHWEST OF ROBERTS. THE STORM WAS MOVING NORTHEAST AT 20 MPH.
 
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.

What forecasters said that day

The local office's own words before this tornado warning 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 tornado warning went out at Jun 14, 2:16 PM MDT, 5 hours 34 minutes earlier.

Area forecast discussion, Jun 14, 2:16 PM MDT, 5 hours 34 minutes before
LOW PRESSURE TROUGH CONTINUES OVER GULF OF ALASKA WITH SHORT WAVES
ROTATING INTO PACIFIC NORTHWEST NEXT COUPLE OF DAYS. AIRMASS OVER EAST
IDAHO TODAY NOT VERY DIFFERENT FROM THURSDAY...VERY WARM SURFACE
TEMPERATURES...MID LEVEL MOISTURE PRESENT...SOUNDING AT LKN AND SLC
FAVORING INVERTED-V TYPE. RADAR AND SATELLITE SHOW THUNDERSTORMS ALREADY
DEVELOPING ZONE 4/12. MAINLY DRY THUNDERSTORMS...A FEW WITH STRONG GUSTY
WINDS AND LIGHTNING. VILS NEAR MONTANA BORDER APPROACHING 45 DBZ...SOME
HAIL POSSIBLE. DIFFERENCE IS ORIENTATION OF THERMAL TROUGH FROM NEVADA
INTO WYOMING AND UPPER DIVERGENCE. BELIEVE BEST DEVELOPMENT WILL BE ZONE
4/12 THIS EVENING...A FEW MOVING NORTH INTO SOUTHERN BANNOCK/POWER
COUNTY THIS EVENING.  SATURDAY MODELS INDICATE STRONGER THETA-E RIDGING
FROM MT/WY EXTENDING WEST INTO IDAHO. SHORT WAVE ALSO MOVING INTO EAST
AND THERMAL TROUGH SHIFTING ORIENTATION BACK INTO SOUTHERN IDAHO/WESTERN
MONTANA FOR STRONGER THUNDERSTORM DAY. WILL KEEP DAYTIME TEMPERATURES
FAIRLY CLOSE TO GUIDANCE AND OVERNIGHT LOWS SLIGHTLY COOLER PER CURRENT
TRENDS. TROUGH SHARPENS ALONG 130W SUNDAY BRINGING HEIGHTS/THICKNESS
DOWN A LITTLE AS IT INCHES INTO COAST. WARM UNSTABLE AIRMASS TO CONTINUE
WITH AFTERNOON/EVENING THUNDERSTORMS. RS

PIH BB 051/085 050/083 049 08222
IDA BB 050/051 049/051 047 08222

In the hours before

Special weather statement, Jun 14, 2:15 PM MDT, 5 hours 35 minutes before
IDZ012-142100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
210 PM MDT FRI JUN 14 1996

...THUNDERSTORMS CONTINUE TO INTENSIFY IN UPPER SNAKE HIGHLANDS...

AT 200 PM DOPPLER WEATHER RADAR AND SATELLITE INDICATE SCATTERED
STRONG THUNDERSTORMS DEVELOPING AND INTENSIFYING IN SOUTHERN CUSTER
COUNTY NORTH OF MACKAY NORTHEASTWARD TO SPENCER AND ISLAND PARK.
THESE STORMS WERE MOVING SLOWLY EAST NORTHEAST AT 15 MPH. TRAVELLERS
ALONG HIGHWAY 20.. HIGHWAY 22.. HIGHWAY 33.. AND INTERSTATE 15 SHOULD
BE CAUTIOUS OF POSSIBLE REDUCED VISIBILITY DUE TO BLOWING DUST CAUSED
BY DOWNBURSTS FROM THESE STORMS.  BRIEF HEAVY RAIN.. SMALL HAIL.. AND
DANGEROUS LIGHTNING ARE ALSO POSSIBLE FROM| THESE STORMS.

END/GOENS
Special weather statement, Jun 14, 3:10 PM MDT, 4 hours 40 minutes before
IDZ02-142200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
300 PM MDT FRI JUN 14 1996

...THUNDERSTORMS DEVELOPING OVER SOUTHERN CASSSIA COUNTY...

AT 300 PM DOPPLER WEATHER RADAR AND SATELLITE INDICATE STRONG
THUNDERSTORMS DEVELOPING AND INTENSIFYING IN SOUTHERN CASSIA
COUNTY FROM SOUTHWEST OF OAKLEY TO ALMO. THESE STORMS HAVE SHOWN
RAPID DEVELOPMENT IN THE LAST 30 MINUTES AND ARE MOVING NORTHEAST AT
ABOUT 10 MPH. TRAVELLERS AND OTHERS IN SOUTHERN CASSIA COUNTY SHOULD
BE PREPARED FOR POSSIBLE REDUCED VISIBILITY DUE TO BLOWING DUST
CAUSED BY DOWNBURSTS AND GUSTY WINDS TO 50 MPH.  BRIEF HEAVY RAIN..
SMALL HAIL.. AND DANGEROUS LIGHTNING ARE ALSO POSSIBLE FROM THESE
STORMS.

END/GOENS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 5:05 PM MDTSevere Thunderstorm WarningPIHCassia, Minidoka40 min
Jun 15, 5:27 PM MDTSevere Thunderstorm WarningPIHBingham48 min

Nearby

Tornado Warnings in Idaho, 1996Every tornado warning in 1996Tornadoes in 1996

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.