Alert archive / Idaho / Special Weather Statements in 2014

Special Weather Statement, NWS Pocatello, ID

August 9, 2014Custer County, Idaho

NWS Pocatello, ID issued this special weather statement at Aug 9, 2014, 3:48 PM MDT for Custer County, Idaho. It was in force for 57 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
Aug 9, 2014, 3:48 PM MDT (21:48 UTC)
Expired
Aug 9, 2014, 4:45 PM MDT
In force
57 min
Issued by
NWS Pocatello, ID

County Custer County, ID

The radar

The Boise radar (KCBX), 163 km from the middle of the area, began a volume at 21:47 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 12:00Z, 9.8 hours before the alert went out and 156 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 12:00Z on 2014-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 12:00Z on 2014-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2066 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
38 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 9, 1:30 PM MDT, 2 hours 18 minutes earlier.

Area forecast discussion, Aug 9, 1:30 PM MDT, 2 hours 18 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
130 PM MDT SAT AUG 9 2014

.SHORT TERM...TONIGHT THROUGH MONDAY. ANOTHER SHOT OF MONSOON
MOISTURE MOVING INTO IDAHO WILL RESUL IN SCATTERED SHOWERS AND A
FEW TSTMS OVER THE MTNS THIS AFTN AND EVE. THE BEST CHANCES WILL
BE IN THE CENTRAL MTNS. COVERAGE WILL BE LESS THAN PREVIOUS FEW
DAYS SINCE THE MOISTURE FIELD IS NOT AS GREAT. STILL HAVE
POTENTIAL FOR ENOUGH RAINFALL TO CAUSE PROBEMS IN THE BEAVER CREEK
BURN AREA...SO WILL CONTINUE THE FLASH FLOOD WATCH. ISOLD TSTMS
EXPECTED ELSEWHERE. ON SUNDAY...THE UPPER RIDGE PULLS BACK A
LITTLE WESTWARD. THIS WILL CUT OFF MOST OF THE MOISTURE FEED
RESULTING IN ONLY ISOLD TO WIDELY SCATTERED TSTMS SUN AND MON.
TEMPS WILL BE CLIMBING BACK TO NORMAL READINGS BY MON.

.LONG TERM...TUESDAY THROUGH SATURDAY. AS AN UPPER LOW MOVES INTO
NORTHERN CA ON TUE...THE UPPER RIDGE IS PUSHED EAST INTO THE
ROCKIES. THIS WILL ESTABLISH SOUTHERLY FLOW OVER THE GREAT
BASIN...AND A RETURN OF MONSOON MOISTURE. EXPECTING MORE
WIDESPREAD ACTIVITY TUE AFTN/EVE...AND MORE ON WED AS THE UPPER
LOW MOVES INTO NV. THE UPPER FLOW TURNS MORE WESTERLY ON THU...
CUTTING OFF THE MOISTURE FLOW. STILL EXPECTING WIDELY SCATTERED
TSTMS...MAINLY IN THE MTNS ON THU WITH THE UPPER LOW ALMOST
OVERHEAD. DRIER CONDITIONS EXPECTED FRI AND SAT. INCREASED CLOUD
COVER AND THE APPROACH OF THE UPPER LOW WILL RESULT IN SLIGHTLY
COOLER TEMPS. HEDGES

&&

.AVIATION...THUNDERSTORMS EXPECTED INTO THIS EVENING WITH VICINITY
AT ALL TAF SITES.   THINK SUN MOST LIKELY TO SEE ON STATION BUT ALL
TAF SITES TS IS A THREAT THROUGH 03Z.  EXPECT LESS THUNDERSTORM
COVERAGE SUNDAY WITH ISOLATED STILL EXPECTED THROUGHOUT THE REGION.
EXPECT LITTLE WIND OTHER THAN THUNDERSTORM OUTFLOW.
GK

&&

.FIRE WEATHER...EXPECT ISOLATED TO WIDELY SCATTERED THUNDERSTORMS
AGAIN WITH LOCALLY HEAVY RAINFALL AS THE MOIST AIR MASS PERSISTS
OVER EASTERN IDAHO.  UPPER RIDGE BUILDS IN FOR SUNDAY AND MONDAY SO
EXPECT SOME DRYING BUT STILL EXPECT ISOLATED THUNDERSTORMS.   SHOULD
HAVE MORE WIDESPREAD SHOWERS AND THUNDERSTORMS TUESDAY AND WEDNESDAY
AS THE UPPER LEVEL RIDGE PUSHES EAST AND PACIFIC TROF PUSHES
EAST.
GK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 9 PM MDT THIS EVENING IDZ031.

&&

In the hours before

Local storm report, Aug 9, 2:53 PM MDT, 55 minutes before
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Special weather statement, Aug 9, 3:17 PM MDT, 31 minutes before
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Special weather statement, Aug 9, 3:21 PM MDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
321 PM MDT SAT AUG 9 2014

IDZ022-092215-
CASSIA ID-
321 PM MDT SAT AUG 9 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL CASSIA COUNTY IN SOUTH CENTRAL IDAHO

AT 318 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF ALMO
TO 12 MILES SOUTH OF ALMO...MOVING SLOWLY NORTHEAST AT 10 MPH.

SMALL HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS...ALONG WITH BRIEF HEAVY RAIN.

LOCATIONS IMPACTED INCLUDE...
   ALMO...
   ELBA...

LAT...LON 4211 11388 4243 11359 4207 11347 4198 11353
      4198 11381
TIME...MOT...LOC 2120Z 208DEG 7KT 4216 11374 4193 11366

HUSTON
Special weather statement, Aug 9, 3:38 PM MDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
338 PM MDT SAT AUG 9 2014

IDZ017-020-031-032-092230-
BUTTE ID-BLAINE ID-CUSTER ID-
338 PM MDT SAT AUG 9 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EXTREME SOUTHEASTERN CUSTER COUNTY IN CENTRAL IDAHO
  CENTRAL BLAINE COUNTY IN CENTRAL IDAHO
  SOUTHWESTERN BUTTE COUNTY IN EAST CENTRAL IDAHO

AT 330 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTHWEST
OF CRATERS OF MOON TO 15 MILES NORTH OF CAREY...MOVING SLOWLY
SOUTHEAST AT 5 MPH.

SMALL HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS...ALONG WITH BRIEF HEAVY RAIN THROUGH 430 PM MDT.

LOCATIONS IMPACTED THROUGH 430 PM MDT INCLUDE...
   CRATERS OF MOON...

LAT...LON 4355 11406 4358 11381 4357 11380 4359 11379
      4362 11356 4334 11326 4326 11399
TIME...MOT...LOC 2137Z 334DEG 6KT 4353 11363 4350 11393

HUSTON
Special weather statement, Aug 9, 3:48 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
348 PM MDT SAT AUG 9 2014

IDZ018-032-092245-
BUTTE ID-CUSTER ID-
348 PM MDT SAT AUG 9 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL CUSTER COUNTY IN CENTRAL IDAHO
  NORTH CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO

AT 342 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF THUNDERSTORMS NEAR STANLEY AND DICKEY AND MACKAY...MOVING
SLOWLY NORTHEAST AT 10 MPH.

SMALL HAIL AND GUSTY WINDS ALONG WITH BRIEF MODERATE RAIN ARE
EXPECTED WITH THESE CELLS AS THEY LIFT NORTHEAST TOWARD CHALLIS
THROUGH 445 PM MDT.

LOCATIONS IMPACTED THROUGH 445 PM MDT INCLUDE...
  RURAL CENTRAL CUSTER COUNTY...
  RURAL NORTHERN BUTTE COUNTY...

LAT...LON 4448 11400 4412 11299 4407 11300 4391 11354
      4412 11417 4421 11517 4428 11517 4430 11523
      4438 11527 4442 11523 4451 11525 4452 11529
      4457 11531
TIME...MOT...LOC 2145Z 197DEG 10KT 4429 11504 4420 11413
          4404 11362

HUSTON

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 6:01 PM MDTSpecial Weather StatementPIHOneida44 min
Aug 8, 6:15 PM MDTSevere Thunderstorm WarningPIHBlaine, Cassia, Minidoka, Power4 min
Aug 8, 6:21 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Blaine, Cassia, Minidoka, Power39 min
Aug 8, 6:35 PM MDTSpecial Weather StatementPIHBear Lake55 min
Aug 8, 7:04 PM MDTSpecial Weather StatementPIHBingham56 min
Aug 8, 7:35 PM MDTSpecial Weather StatementPIHBear Lake55 min
Aug 8, 7:45 PM MDTSpecial Weather StatementPIHFranklin60 min
Aug 8, 8:01 PM MDTSpecial Weather StatementPIHBannock59 min
Aug 8, 8:27 PM MDTSpecial Weather StatementPIHBear Lake63 min
Aug 8, 8:52 PM MDTSpecial Weather StatementPIHCaribou53 min
Aug 8, 9:22 PM MDTSpecial Weather StatementPIHCamas53 min
Aug 8, 9:52 PM MDTFlash Flood WarningPIHBlaine2 hr
Aug 9, 3:06 AM MDTFlash Flood WatchPIH17 hr
Aug 9, 1:17 PM MDTFlash Flood WarningPIHBlaine4 hr
Aug 9, 3:17 PM MDTSpecial Weather StatementPIHOneida58 min
Aug 9, 3:21 PM MDTSpecial Weather StatementPIHCassia54 min
Aug 9, 3:38 PM MDTSpecial Weather StatementPIHBlaine52 min
Aug 9, 4:21 PM MDTSpecial Weather StatementPIHFranklin54 min
Aug 9, 4:25 PM MDTSpecial Weather StatementPIHCassia50 min
Aug 9, 4:30 PM MDTSpecial Weather StatementPIHCassia45 min
Aug 9, 4:44 PM MDTFlash Flood WarningPIHCassia3 hr
Aug 9, 5:12 PM MDTFlash Flood WarningPIHBlaine2 hr
Aug 9, 5:30 PM MDTSpecial Weather StatementPIHMinidoka60 min

Nearby

Special Weather Statements in Idaho, 2014Every special weather statement in 2014

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.