Alert archive / Idaho / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 27, NWS Pocatello, ID

June 19, 2004Cassia County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Jun 19, 2004, 7:54 PM MDT for Cassia County, Idaho. It was in force for 36 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 19, 2004, 7:54 PM MDT (01:54 UTC)
Expired: Jun 19, 2004, 8:30 PM MDT
In force: 36 min
Issued by: NWS Pocatello, ID
Area: Counties, with a storm outline in the text

County Cassia County, ID

The radar

The Pocatello radar (KSFX), 131 km from the middle of the area, began a volume at 01:57 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Elko, NV (KLKN), launched 00:00Z, 1.9 hours before the alert went out and 151 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: 9 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 3422 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 51 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.

733 
WUUS55 KPIH 200154
SVRPIH
IDC031-200230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
752 PM MDT SAT JUN 19 2004

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

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL CASSIA COUNTY IN IDAHO
  THIS INCLUDES THE CITY OF BASIN

* UNTIL 830 PM MDT

* AT 747 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM
  WAS LOCATED 8 MILES SOUTH OF BASIN...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  9 MILES SOUTH OF ELBA BY 810 PM MDT

HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED NEAR OAKLEY  WITH 
THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE 
ACTION TO PROTECT LIFE AND PROPERTY.

LAT...LON 4228 11383 4201 11387 4200 11340 4224 11333

$$

RS

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 19, 3:05 PM MDT, 4 hours 49 minutes earlier.

Area forecast discussion, Jun 19, 3:05 PM MDT, 4 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
305 PM MDT SAT JUN 19 2004

.DISCUSSION...
AFTERNOON CONVECTION HAS BEEN LIMITED TO MOUNTAIN AREAS THUS FAR AS
DRYER AIR HAS PUSHED INTO THE REGION FROM CIRCULATING LOW IN
WASHINGTON STATE.  HOWEVER...CONVECTIVE TEMPERATURES BETWEEN 73 AND
78 DEGREES ARE BEING REACHED AND MORE DEVELOPMENT IS EXPECTED AS
UPPER LEVEL JET AXIS MOVES INTO REGION ASSISTING IN UPWARD
VERTICAL MOTION.  WITH ALL THE CONVECTION FROM OVERNIGHT AND THIS
MORNING...STABILIZED LAYER IN SNAKE VALLEY HAS PRECLUDED ADDITIONAL
DEVELOPMENT.  SOME STORMS OVER THE MOUNTAINS WILL PUSH OUT INTO THE
SNAKE PLAIN...BUT ONLY ISOLATED EVENTS AT THIS TIME.  MAIN
DEVELOPMENT IS IN THE CENTRAL MOUNTAINS WHERE LIS ARE -2 TO -4 AND
BETTER DYNAMICS WITH LEFT FRONT QUADRANT OF UPPER JET.

STORMS TO DIE OUT LATER THIS EVENING WITH LOSS OF INSTABILITY...WITH
WITH LOW SLOWLY FILLING AND SHIFTING EASTWARD AND SLIGHT CHANCE
REMAINS ON SUNDAY.  SHEAR AXIS OVER AREA ON SUNDAY COMBINED WITH
ANOTHER SHORTWAVE MOVING INTO THE AREA FROM CANADA WILL KEEP A
SLIGHT CHANCE OF THUNDERSTORMS DURING DAY AND INTO MONDAY.

GFS AND ENSEMBLE MODEL GROUP CONTINUE TO SHOW LARGE SCALE RIDGING
DEVELOPING TUESDAY THROUGH END OF THE WEEK.  WARMING TREND WILL
BEGIN IN EARNEST ON WEDNESDAY...BUT WITH EASTERN IDAHO IN NORTHWEST
FLOW ALOFT SOME CLOUDS TO PASS BY AND MAIN AXIS OF THERMAL RIDGE TO
THE WEST.  BEGINNING THURSDAY AND THROUGH TO SUNDAY...IT IS
CURRENTLY HARD TO TELL IF A SHORTWAVE WILL SLIP DOWN IN THE
NORTHWEST FLOW AND AT WHICH TIME PERIOD...SO HAVE LEFT OFF MENTION
OF PRECIP IN LONG RANGE.  PRESTON

&&

.PIH WATCHES/WARNING/ADVISORIES...NONE.
&&

Hazardous weather outlook, Jun 19, 4:00 AM MDT, 15 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE POCATELLO ID
400 AM MDT SAT JUN 19 2004

IDZ017>023-031-032-201200-
EASTERN MAGIC VALLEY-BIG AND LITTLE WOOD RIVER REGION-
SAWTOOTH MOUNTAINS-LOST RIVER/PAHSIMEROI-UPPER SNAKE HIGHLANDS-
UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN-
SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS-
400 AM MDT SAT JUN 19 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO

.DAY ONE...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. A WEAK SURFACE FRONT
WILL PUSH THROUGH THE REGION THIS EVENING UNDER THE RIGHT REAR QUAD
OF AN EXITING UPPER JET WHICH MAY HELP TO GENERATE STRONGER
THUNDERSTORM DEVELOPMENT NORTH OF POCATELLO.

.DAYS TWO THROUGH SEVEN...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

SPOTTER INFORMATION STATEMENT...
WE ASK ALL TRAINED SPOTTERS TO REPORT SIGNIFICANT WEATHER
CONDITIONS. THIS INFORMATION SHOULD BE CALLED INTO THE LOCAL
NATIONAL WEATHER SERVICE OFFICE IN POCATELLO USING THE 1-800 SEVERE
WEATHER HOTLINE...OR OTHER STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jun 19, 4:55 PM MDT, 2 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
455 PM MDT SAT JUN 19 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0430 PM     HAIL             4 SW POCATELLO          42.83N 112.52W
06/19/2004  0.75 INCH        BANNOCK            ID   TRAINED SPOTTER

&&

RS/VP

Local storm report, Jun 19, 7:54 PM MDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
754 PM MDT SAT JUN 19 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0749 PM     HAIL             12 S OAKLEY             42.07N 113.88W
06/19/2004  1.00 INCH        CASSIA             ID   TRAINED SPOTTER

            QUARTER SIZE HAIL REPORTED 12 MILES SOUTH OF OAKLEY.
            LITTLE WIND, LOTS OF THUNDER AND LIGHTNING.

&&

NJH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:19 PM MDT	Severe Thunderstorm Warning	PIH	Cassia	41 min
Jun 20, 1:52 PM MDT	Severe Thunderstorm Warning	PIH	Bonneville	58 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2004 Every severe thunderstorm warning in 2004

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.