Alert archive / Idaho / Flash Flood Warnings in 2014

Flash Flood Warning 47, NWS Pocatello, ID

August 22, 2014Blaine County, Idaho

NWS Pocatello, ID issued this flash flood warning at Aug 22, 2014, 5:08 PM MDT for Blaine County, Idaho. It was in force for 3 hr. 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 22, 2014, 5:08 PM MDT (23:08 UTC)
Expired: Aug 22, 2014, 8:00 PM MDT
In force: 3 hr
Issued by: NWS Pocatello, ID
Area: Storm-based polygon
Flood severity: None

County Blaine County, ID

The radar

The Boise radar (KCBX), 134 km from the middle of the area, began a volume at 23:10 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 flash flood 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, 11.1 hours before the alert went out and 130 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: 14 J/kg
Mixed-layer CIN: -318 J/kg
Mixed-layer LCL: 1950 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 168 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.

449 
WGUS55 KPIH 222308
FFWPIH
IDC013-230200-
/O.NEW.KPIH.FF.W.0047.140822T2308Z-140823T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
508 PM MDT FRI AUG 22 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL BLAINE COUNTY IN CENTRAL IDAHO...
  THIS INCLUDES THE CITY OF HAILEY...

* UNTIL 800 PM MDT

* AT 500 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN FROM THUNDERSTORMS OVER THE BEAVER CREEK BURN AREA.     
  ADDITIONAL HEAVY RAIN IS LIKELY.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
  IN AND NEAR THE BEAVER CREEK BURN AREA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DEBRIS FLOWS ARE POSSIBLE IN AND NEAR THE BEAVER CREEK BURN AREA.

&&

LAT...LON 4374 11467 4375 11443 4349 11428 4347 11452
      4348 11452 4349 11456 4353 11460 4356 11459
      4359 11468 4366 11467 4367 11468 4373 11469

$$

HEDGES

1 follow-up statement

202 
WGUS75 KPIH 230209
FFSPIH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
809 PM MDT FRI AUG 22 2014

IDC013-230219-
/O.EXP.KPIH.FF.W.0047.000000T0000Z-140823T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLAINE ID-
809 PM MDT FRI AUG 22 2014

...THE FLASH FLOOD WARNING HAS EXPIRED FOR WEST CENTRAL BLAINE
COUNTY...

LAT...LON 4374 11467 4375 11443 4349 11428 4347 11452
      4348 11452 4349 11456 4353 11460 4356 11459
      4359 11468 4366 11467 4367 11468 4373 11469

$$

HEDGES

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 22, 1:50 PM MDT, 3 hours 18 minutes earlier.

Area forecast discussion, Aug 22, 1:50 PM MDT, 3 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
150 PM MDT FRI AUG 22 2014

.SHORT TERM...TONIGHT THROUGH SUNDAY. AN UNCHARACTERISTICALLY DEEP
AND WET LOW PRESSURE SYSTEM WAS NOTED OVER PENDLETON WITH NUMEROUS
SHOWERS AND SCATTERED THUNDERSTORMS OVERSPREADING SE IDAHO AHEAD OF
THE LOW THIS AFTERNOON. THE MODELS INDICATE THAT THE LOW WILL SHIFT
OVER SUN VALLEY TONIGHT...IDAHO FALLS SATURDAY AFTERNOON AND THEN
BILLINGS SATURDAY NIGHT WITH ACCOMPANYING PRECIPITATION GENERALLY
TAPERING OFF SOME LATE TONIGHT AND THEN REDEVELOPING ACROSS THE
CNTRL AND ERN MOUNTAINS AND THE UPPER SNAKE PLAIN SATURDAY AFTERNOON
BEFORE TAPERING OFF FROM WEST TO EAST ACROSS SRN IDAHO SATURDAY
NIGHT/SUNDAY AS THE LOW LIFTS NE OF THE REGION. NUMEROUS SHOWERS ARE
ANTICIPATED OVER THE CNTRL MOUNTAINS THROUGH THE EVENING...SOME
HEAVY AT TIMES. THUS WILL CONTINUE THE FLASH FLOOD WATCH...PRIMARILY
FOR THE BURN SCARS...THROUGH MIDNIGHT. HUSTON

.LONG TERM...SUNDAY NIGHT THROUGH NEXT FRIDAY. SECONDARY ENERGY
DROPS INTO THE WRN EXTENT OF THE EXITING TROUGH SUNDAY NIGHT/MONDAY
BRINGING SCATTERED SHOWERS TO THE REGION MONDAY/MONDAY NIGHT.
CLEARING SKIES AND A PERIOD OF DRIER WEATHER WILL FOLLOW TUESDAY
THROUGH THURSDAY AS A RIDGE OF HIGH PRESSURE BUILDS OVER THE NRN
GREAT BASIN. FOR THE WEEKEND...THE GFS IS PROJECTING THAT HURRICANE
MARIE...NOW LOCATED WEST OF ACAPULCO...WILL LIFT NW AND EVENTUALLY
GET SWEPT INTO YET ANOTHER PAC THROUGH SWEEPING INTO THE NW COAST
SATURDAY AFTERNOON. WE WILL OBVIOUSLY BE WATCHING THESE DEVELOPMENTS
WITH INTEREST. HUSTON
&&

.AVIATION...CURRENT WV/IR IMAGERY SHOWING UPPER LOW DEEPENING OVER
PAC NW THIS AFTERNOON WITH JET STREAK DYNAMICS ENHANCING CONVECTION
OVER SOUTHEAST IDAHO. EXPECT MAINLY VFR CONDITIONS TODAY...BUT
HEAVIER SHOWERS MAY PRODUCE SOME LOWER VISIBILITY. WITH SOME
CLEARING EXPECTED OVER THE SNAKE PLAIN TONIGHT AND ABUNDANT
LOW-LEVEL MOISTURE...PIH AND IDA MAY SEE SOME CIG/VIS ISSUES IN THE
MORNING. HINSBERGER
&&

.FIRE WEATHER...ACTIVE WEATHER WILL CONTINUE THROUGH TOMORROW NIGHT
AS UPPER LOW DRIFTS FROM THE COLUMBIA RIVER BASIN INTO SOUTHEAST
IDAHO. INSTABILITY...LIFT AND MOISTURE ARE ALL IN PLACE THIS
AFTERNOON TO PRODUCE WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS
WHICH SHOULD DIMINISH SOMEWHAT OVERNIGHT. LOCALLY HEAVY RAINFALL MAY
PRODUCE FLASH FLOODING...ESPECIALLY IN RECENT BURN AREAS. UPPER LOW
TOMORROW AFTERNOON WILL DRIFT INTO THE YELLOWSTONE AREA...AND MODELS
SHOWING MODERATE TO HEAVY PRECIPITATION WRAPPING AROUND INTO FIRE
ZONES 475 AND 476...THEN DRIFTING OVER ZONES 410 AND 411 IN THE
EASTERN HIGHLANDS TOMORROW EVENING. WEATHER LOOKS A LITTLE QUIETER
ON SUNDAY...BUT ANOTHER UPPER DISTURBANCE WILL LIKELY IMPACT THE
REGION ON MONDAY. THE SYSTEM WILL FOCUS THE PRECIPITATION MAINLY
OVER THE HIGHER ELEVATIONS. CONDITIONS SHOULD RAPIDLY IMPROVE BY
TUESDAY AND UPPER RIDGING SHOULD LEAD TO DRIER WEATHER THROUGH THE
END OF THE WEEK.  HINSBERGER
&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH CONTINUES UNTIL MIDNIGHT IDZ018-031-032.
&&

In the hours before

Local storm report, Aug 22, 4:04 PM MDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
404 PM MDT FRI AUG 22 2014

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

0340 PM     TSTM WND GST     20 S BELLEVUE           43.18N 114.26W
08/22/2014  U0 MPH           LINCOLN            ID   LAW ENFORCEMENT

            AT BORDER OF LINCOLN AND BLAINE COUNTY THE SHERIFF
            REPORTS A CAR BLOWN OFF THE ROAD DUE TO GUSTY WINDS.

&&

DPHELPS

Local storm report, Aug 22, 4:06 PM MDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
406 PM MDT FRI AUG 22 2014

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

0405 PM     HAIL             5 WSW GANNETT           43.33N 114.27W
08/22/2014  E0.50 INCH       BLAINE             ID   TRAINED SPOTTER

            MARBLE SIZE HAIL

&&

DPHELPS

Special weather statement, Aug 22, 4:08 PM MDT, 1 hour before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
408 PM MDT FRI AUG 22 2014

IDZ017-021-022-222330-
ONEIDA ID-POWER ID-CASSIA ID-BLAINE ID-
408 PM MDT FRI AUG 22 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EXTREME SOUTHEASTERN BLAINE COUNTY IN CENTRAL IDAHO
  EASTERN CASSIA COUNTY IN SOUTH CENTRAL IDAHO
  WESTERN POWER COUNTY IN SOUTHEAST IDAHO
  WEST CENTRAL ONEIDA COUNTY IN SOUTHEAST IDAHO

AT 406 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF THUNDERSTORMS EXTENDING FROM 16 MILES NORTH OF IDAHOME TO 8
MILES NORTHEAST OF ELBA TO 34 MILES SOUTHWEST OF ALMO...MOVING EAST
AT 15 MPH.

WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
BRIEF HEAVY RAIN.

LOCATIONS IMPACTED THROUGH 530 PM MDT INCLUDE...
   NEELEY AND AMERICAN FALLS...

LAT...LON 4227 11352 4272 11344 4288 11267 4243 11277
      4199 11316 4198 11376
TIME...MOT...LOC 2207Z 254DEG 13KT 4265 11334 4229 11341
          4167 11395

HUSTON

Local storm report, Aug 22, 4:29 PM MDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
429 PM MDT FRI AUG 22 2014

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

0417 PM     FUNNEL CLOUD     5 S BELLEVUE            43.39N 114.26W
08/22/2014                   BLAINE             ID   OTHER FEDERAL

            FUNNEL CLOUD SPOTTED 5 MILES SOUTH OF BELLEVUE AT 417
            THIS AFTERNOON

&&

DPHELPS

Special weather statement, Aug 22, 4:29 PM MDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
429 PM MDT FRI AUG 22 2014

IDZ017-020-021-032-230000-
MINIDOKA ID-BINGHAM ID-BUTTE ID-BLAINE ID-
429 PM MDT FRI AUG 22 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL BLAINE COUNTY IN CENTRAL IDAHO
  SOUTHERN BUTTE COUNTY IN EAST CENTRAL IDAHO
  NORTHEASTERN MINIDOKA COUNTY IN SOUTH CENTRAL IDAHO
  NORTHWESTERN BINGHAM COUNTY IN SOUTHEAST IDAHO

AT 424 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF THUNDERSTORMS EXTENDING FROM 6 MILES NORTHWEST OF ARCO TO 18
MILES SOUTHEAST OF CRATERS OF MOON...MOVING NORTHEAST AT 15 MPH.

SMALL HAIL...BRIEF HEAVY RAIN AND WIND GUSTS UP TO 45 MPH ARE
EXPECTED WITH THESE STORMS AS THEY MOVE TOWARDS ARCO.

LOCATIONS IMPACTED THROUGH 600 PM MDT INCLUDE...
   ARCO...
   HOWE...
   SOUTHWEST INL...
   CENTRAL INL...

LAT...LON 4307 11347 4375 11347 4398 11279 4397 11271
      4332 11272
TIME...MOT...LOC 2228Z 245DEG 14KT 4370 11336 4319 11336

HUSTON

Local storm report, Aug 22, 5:02 PM MDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
502 PM MDT FRI AUG 22 2014

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

0345 PM     HAIL             S RICHFIELD             43.05N 114.15W
08/22/2014  E1.00 INCH       LINCOLN            ID   TRAINED SPOTTER

            ONE INCH HAIL

&&

DPHELPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 6:07 PM MDT	Special Weather Statement	PIH	Power	53 min
Aug 21, 6:10 PM MDT	Severe Thunderstorm Warning	PIH	Madison, Teton	42 min
Aug 21, 6:24 PM MDT	Severe Thunderstorm Warning	PIH	Blaine, Lincoln	24 min
Aug 21, 6:39 PM MDT	Special Weather Statement	PIH	Butte	51 min
Aug 21, 6:46 PM MDT	Special Weather Statement	PIH	Butte	59 min
Aug 21, 7:17 PM MDT	Areal Flood Advisory	PIH	Bingham, Butte	3 hr
Aug 21, 7:41 PM MDT	Areal Flood Advisory	PIH	Blaine, Butte, Custer	3 hr
Aug 22, 9:08 AM MDT	Special Weather Statement	PIH	Custer	82 min
Aug 22, 9:26 AM MDT	Flash Flood Watch	PIH		15 hr
Aug 22, 10:48 AM MDT	Special Weather Statement	PIH	Blaine	57 min
Aug 22, 10:52 AM MDT	Special Weather Statement	PIH	Camas	38 min
Aug 22, 11:31 AM MDT	Special Weather Statement	PIH	Camas	59 min
Aug 22, 12:01 PM MDT	Special Weather Statement	PIH	Blaine	74 min
Aug 22, 12:18 PM MDT	Special Weather Statement	PIH	Franklin	42 min
Aug 22, 1:37 PM MDT	Special Weather Statement	PIH	Minidoka	83 min
Aug 22, 2:36 PM MDT	Special Weather Statement	PIH	Lincoln	54 min
Aug 22, 2:47 PM MDT	Special Weather Statement	PIH	Cassia	58 min
Aug 22, 3:04 PM MDT	Severe Thunderstorm Warning	PIH	Blaine, Lincoln	41 min
Aug 22, 3:09 PM MDT	Tornado Warning	PIH	Lincoln	51 min
Aug 22, 3:57 PM MDT	Tornado Warning	PIH	Blaine	48 min
Aug 22, 4:08 PM MDT	Special Weather Statement	PIH	Power	82 min
Aug 22, 4:15 PM MDT	Tornado Warning	PIH	Blaine, Minidoka	15 min
Aug 22, 4:29 PM MDT	Special Weather Statement	PIH	Butte	91 min
Aug 22, 4:37 PM MDT	Tornado Warning	PIH	Blaine	19 min
Aug 22, 4:55 PM MDT	Areal Flood Advisory	PIH	Blaine, Butte	3 hr
Aug 22, 5:19 PM MDT	Special Weather Statement	PIH	Power	56 min

Nearby

Flash Flood Warnings in Idaho, 2014 Every flash flood warning 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.