Alert archive / Idaho / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 2, NWS Pocatello, ID

May 28, 20084 counties in Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at May 28, 2008, 2:54 PM MDT for 4 counties in 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: May 28, 2008, 2:54 PM MDT (20:54 UTC)
Expired: May 28, 2008, 3:30 PM MDT
In force: 36 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon

Counties Bingham County, ID, Bonneville County, ID, Butte County, ID, Jefferson County, ID

The radar

The Pocatello radar (KSFX), 67 km from the middle of the area, began a volume at 20:55 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.

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

Boise Airport, ID (KBOI), launched 12:00Z, 8.9 hours before the alert went out and 295 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 28 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.

000 
WUUS55 KPIH 282054
SVRPIH
IDC011-019-023-051-282130-
/O.NEW.KPIH.SV.W.0002.080528T2054Z-080528T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
254 PM MDT WED MAY 28 2008

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME EAST CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO...
  NORTH CENTRAL BINGHAM COUNTY IN SOUTHEAST IDAHO...
  THIS INCLUDES THE CITY OF SOUTHEAST INL...
  NORTHWESTERN BONNEVILLE COUNTY IN SOUTHEAST IDAHO...
  SOUTHWESTERN JEFFERSON COUNTY IN SOUTHEAST IDAHO...
  THIS INCLUDES THE CITY OF TERRETON...

* UNTIL 330 PM MDT

* AT 251 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED 6 MILES SOUTHEAST OF SOUTHEAST INL...AND MOVING
  NORTH AT 33 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TERRETON...MUD LAKE AND 9 MILES SOUTHEAST OF MONTEVIEW BY 330 PM
  MDT...

LAT...LON 4384 11213 4337 11250 4344 11274 4353 11269
      4361 11271 4396 11270 4396 11268
TIME...MOT...LOC 2054Z 200DEG 28KT 4357 11255

$$

JKEYES

1 follow-up statement

000 
WWUS55 KPIH 282113
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
312 PM MDT WED MAY 28 2008

IDC023-282122-
/O.CAN.KPIH.SV.W.0002.000000T0000Z-080528T2130Z/
BUTTE ID-
312 PM MDT WED MAY 28 2008

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL BUTTE
COUNTY IS CANCELLED...

THE STORM HAS MOVED OUT OF THE AREA TO THE NORTHEAST. 

LAT...LON 4395 11264 4395 11262 4384 11213 4354 11238
      4353 11256 4357 11263 4361 11267 4395 11267
      4396 11266
TIME...MOT...LOC 2112Z 200DEG 28KT 4370 11248

$$

IDC011-019-051-282130-
/O.CON.KPIH.SV.W.0002.000000T0000Z-080528T2130Z/
JEFFERSON ID-BONNEVILLE ID-BINGHAM ID-
312 PM MDT WED MAY 28 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MDT
FOR EXTREME NORTH CENTRAL BINGHAM...NORTHWESTERN BONNEVILLE AND
SOUTHWESTERN JEFFERSON COUNTIES...

AT 308 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
 THIS STORM WAS LOCATED 9 MILES NORTHEAST OF SOUTHEAST INL...MOVING
NORTH AT 32 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TERRETON AND MUD LAKE BY 325 PM MDT...
  9 MILES SOUTHEAST OF MONTEVIEW BY 330 PM MDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THREE QUARTER INCH HAIL COVERING THE GROUND HAS BEEN REPORTED AT THE 
INL SITE...5 TO 6 MILES NORTHEAST OF ATOMIC CITY WITH THIS STORM. IF 
YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT 
LIFE AND PROPERTY.

LAT...LON 4395 11264 4395 11262 4384 11213 4354 11238
      4353 11256 4357 11263 4361 11267 4395 11267
      4396 11266
TIME...MOT...LOC 2112Z 200DEG 28KT 4370 11248

$$

JKEYES

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 May 28, 10:44 AM MDT, 4 hours 10 minutes earlier.

Area forecast discussion, May 28, 10:44 AM MDT, 4 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1044 AM MDT WED MAY 28 2008

.UPDATE...HAVE ISSUED A FLASH FLOOD WATCH FOR THE CENTRAL
MOUNTAINS OF IDAHO THROUGH 10PM THIS EVENING. MORNING RAINFALL
TOTALS IN SOME AREAS WERE IN EXCESS OF ONE QUARTER OF AN INCH IN
90 MINUTES OR LESS...ESPECIALLY AROUND THE CASTLE ROCK FIRE AREA.
AM EXPECTING MORE SHOWERS/TSTORMS THIS AFTN WITH HEAVY RAINFALL
POSSIBLE. AM CONCERNED AS WELL ABOUT STRONG/SEVERE POTENTIAL THIS
AFTN WITH DRY SLOT WORKING INTO AREA. THIS IS ALLOWING FOR PLENTY
OF SUN AND INSTABILITY. ALSO BELIEVE SHEAR MAY BE STRONGER THAN
MODELS DEPICT DUE TO THINKING JET INFLUENCE WILL BE FARTHER WEST. EXPECTING
MAINLY HAIL THREAT AND HEAVY RAINFALL WITH STRONGEST ACTIVITY.
WILL CONTINUE TO MONITOR THIS THROUGHOUT THE DAY.  KEYES

&&

.PREV DISCUSSION... /ISSUED 230 AM MDT WED MAY 28 2008/

DISCUSSION...BROAD UPPER TROUGH NOTED ON SATELLITE IMAGERY ACROSS
THE WEST COAST EARLY THIS MORNING. A FAIRLY SIGNIFICANT VORT FEATURE
WAS NOTED LIFTING NE THROUGH ELY ON NOSE OF UPPER JET. VORT EXPECTED
TO SHIFT ACROSS SRN HALF OF FORECAST AREA THIS MORNING THEN NRN HALF
THIS AFTERNOON WITH ATTENDING SHOWERS/THUNDERSTORMS ACCOMPANYING
WAVE. MODELS SHOWING A COUPLE OF INGREDIENTS THAT MAY HELP TO
PRODUCE STRONG/ORGANIZED CONVECTION THIS AFTERNOON BUT
TIMING/POSITIONING OF ELEMENTS NOT WELL ALIGNED...WITH DECENT CAPE
VALUES FOCUSED ACROSS THE CNTRL MOUNTAIN ZONES AND 0-6KM SHEAR OVER
THE SE HIGHLANDS PER THE GFS WHEREAS THE NAM PLACED THE BEST CAPE
OVER THE SNAKE PLAINS CLOSER TO UPPER SHEAR ZONE. IF STORMS WERE TO
GET ORGANIZED...MAIN THREAT WOULD BE HAIL POTENTIALLY APPROACHING
SEVERE LEVELS. SHORT-WAVE ENERGY CONTINUES TO EJECT FROM THE COASTAL
LOW THROUGH THE WEEKEND AS UPSTREAM ENERGY DIGS INTO THE TROUGH FROM
THE PAC TO MAINTAIN SOME SEMBLANCE OF A MOIST AND UNSTABLE SW FLOW
ACROSS THE REGION WITH DIURNALLY FAVORED CONVECTION THROUGH SUNDAY.
SIZABLE CHUNK OF ENERGY ENTERS THE SYSTEM LATE SUNDAY AFTERNOON
SPINNING UP A CLOSED CIRCULATION WHICH DIGS SOUTH ALONG THE SIERRA
INTO CNTRL NEVADA EARLY NEXT WEEK WHICH EVENTUALLY LIFTS NE THROUGH
IDAHO WEDNESDAY FOR A HIGH PROBABILITY OF PRECIPITATION IF SCENARIO
PLAYS OUT. CONFIDENCE BETTER THAN AVERAGE WITH SIMILAR DEPICTION
NOTED ON THE ECMWF. STATISTICAL TEMPERATURE GUIDANCE PUSHES DAYTIME
HIGHS INTO CLIMATOLOGICAL RANGE (LOWER 70S IN SNAKE PLAIN) BY THE
WEEKEND AND THIS GENERALLY ACCEPTED AND FOLLOWED IN GRIDS. THE
HENRYS FORK NEAR REXBURG REMAINS ABOVE FLOOD STAGE WITH NO CHANGE
NEEDED TO PREVIOUSLY ISSUED STATEMENTS. HUSTON

AVIATION...MOIST SW FLOW FROM A CLOSED UPPER LOW OFF THE NRN CA
COAST CONTINUES. SHOWERS AND A FEW TSTMS WILL DEVELOP AGAIN THIS
AFTN. OCNL MVFR CIGS CAN BE EXPECTED IN THE TSTMS...OTHERWISE VFR
WILL BE THE PREVAILING CONDITION. HEDGES

FIRE WEATHER...A CLOSED UPPER LOW OFF THE CA COAST IS RESULTING IN
MOIST SW FLOW OVER ID FOR THE NEXT FEW DAYS. SHOWERS AND A FEW
AFTERNOON THUNDERSTORMS CAN BE EXPECTED AGAIN TODAY AND THURSDAY.
HUMIDITY READINGS WILL CONTINUE TO RUN ON THE HIGH SIDE DUE TO THE
MOIST AIRMASS AND WET GROUND. NO SIGNIFICANT FIRE WEATHER CONCERNS.
HEDGES

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 10 PM MDT THIS EVENING FOR IDZ018-031-
032.

FLOOD WARNING FOR HENRYS FORK OF THE SNAKE RIVER NEAR REXBURG
CONTINUES UNTIL FURTHER NOTICE.  &&

Hazardous weather outlook, May 28, 4:00 AM MDT, 10 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE POCATELLO ID
400 AM MDT WED MAY 28 2008

IDZ017>025-031-032-291200-
EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS-
UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN-
SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS-
CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION-
BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI-
400 AM MDT WED MAY 28 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

A FLOOD WARNING REMAINS IN EFFECT FOR THE HENRYS FORK AT REXBURG.
SHOWERS AND THUNDERSTORMS RETURN TODAY AS YET ANOTHER DISTURBANCE
LIFTS NORTHEAST ACROSS THE REGION. THERE ARE A COUPLE OF INGREDIENTS
THAT MAY HELP TO PROVIDE MORE STRENGTH AND ORGANIZATION TO
DEVELOPING STORMS TODAY...WHICH IN TURN MAY PRODUCE MODERATE SIZED
HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  SHOWERS AND
THUNDERSTORMS WILL CONTINUE TO BE A POSSIBILITY IN THE AFTERNOONS
AND EVENINGS.

.SPOTTER INFORMATION STATEMENT...

WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT
WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY
INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL...
EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE
FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS
CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE
OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR
208-233-0834.

In the hours before

Local storm report, May 28, 9:18 AM MDT, 5 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
918 AM MDT WED MAY 28 2008

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

0915 AM     HEAVY RAIN       6 N HAILEY              43.60N 114.30W
05/28/2008  M0.40 INCH       BLAINE             ID   TRAINED SPOTTER

            1 HOUR ACCUMULATION

&&

TWYATT

Local storm report, May 28, 1:13 PM MDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
113 PM MDT WED MAY 28 2008

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

0108 PM     HAIL             7 S ROCKLAND            42.47N 112.87W
05/28/2008  E0.25 INCH       POWER              ID   TRAINED SPOTTER

0105 PM     HAIL             3 S ROCKLAND            42.53N 112.87W
05/28/2008  E0.25 INCH       POWER              ID   TRAINED SPOTTER

&&

TWYATT

Local storm report, May 28, 1:51 PM MDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
151 PM MDT WED MAY 28 2008

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

0147 PM     HAIL             5 N OAKLEY              42.31N 113.88W
05/28/2008  E0.50 INCH       CASSIA             ID   TRAINED SPOTTER

            PEA TO MARBLE SIZE HAIL COVERING THE GROUND ALONG WITH
            HEAVY RAIN

&&

TWYATT

Local storm report, May 28, 2:02 PM MDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
202 PM MDT WED MAY 28 2008

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

0200 PM     HAIL             POCATELLO ARPT          42.92N 112.60W
05/28/2008  E0.50 INCH       POWER              ID   NWS EMPLOYEE

            PEA TO MARBLE HAIL ACCOMPANIED WITH HEAVY RAIN.

&&

TWYATT

Local storm report, May 28, 2:18 PM MDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
218 PM MDT WED MAY 28 2008

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

0215 PM     HAIL             18 S ROCKLAND           42.31N 112.87W
05/28/2008  E1.00 INCH       ONEIDA             ID   EMERGENCY MNGR

            REPORT FORWARDED BY POWER COUNTY EMERGENCY MANAGER

&&

TWYATT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 10:17 AM MDT	Flash Flood Watch	PIH		12 hr
May 28, 12:55 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Bingham, Cassia, Power	50 min
May 28, 3:29 PM MDT	Severe Thunderstorm Warning	PIH	Clark, Fremont, Jefferson, Madison	46 min
May 28, 5:54 PM MDT	Severe Thunderstorm Warning	PIH	Oneida, Power	36 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2008 Every severe thunderstorm warning in 2008

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.