Alert archive / Idaho / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Pocatello, ID

August 4, 2014Bannock County, Oneida County, Power County, Idaho

NWS Pocatello, ID issued this flash flood warning at Aug 4, 2014, 5:02 PM MDT for Bannock County, Oneida County, Power 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 4, 2014, 5:02 PM MDT (23:02 UTC)
Expired
Aug 4, 2014, 8:00 PM MDT
In force
3 hr
Issued by
NWS Pocatello, ID
Area
Storm-based polygon
Flood severity
None

Counties Bannock County, ID, Oneida County, ID, Power County, ID

The radar

The Pocatello radar (KSFX), 90 km from the middle of the area, began a volume at 23:01 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 11.0 hours before the alert went out and 182 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, Salt Lake City I, UT at 12:00Z on 2014-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2014-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
6 J/kg
Mixed-layer CIN
-168 J/kg
Mixed-layer LCL
1202 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

817 
WGUS55 KPIH 042302
FFWPIH
IDC005-071-077-050200-
/O.NEW.KPIH.FF.W.0013.140804T2302Z-140805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
502 PM MDT MON AUG 4 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BANNOCK COUNTY IN SOUTHEAST IDAHO...
  ONEIDA COUNTY IN SOUTHEAST IDAHO...
  THIS INCLUDES THE CITY OF MALAD...
  SOUTHEASTERN POWER COUNTY IN SOUTHEAST IDAHO...

* UNTIL 800 PM MDT

* AT 454 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
  RURAL SOUTHEASTERN POWER COUNTY...
  RURAL SOUTHERN BANNOCK COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE.

&&

LAT...LON 4262 11266 4264 11195 4263 11192 4253 11191
      4252 11190 4244 11188 4241 11190 4226 11191
      4226 11199 4228 11199 4229 11218 4211 11221
      4208 11280

$$

DMH
2 follow-up statements
803 
WGUS75 KPIH 050026
FFSPIH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
626 PM MDT MON AUG 4 2014

IDC005-071-077-050200-
/O.CON.KPIH.FF.W.0013.000000T0000Z-140805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONEIDA ID-POWER ID-BANNOCK ID-
626 PM MDT MON AUG 4 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM MDT FOR
SOUTHERN BANNOCK...SOUTHEASTERN POWER AND ONEIDA COUNTIES...

AT 618 PM MDT...MUCH OF THE AREA INCLUDED IN THE FLASH FLOOD WARNING 
WAS FREE OF PRECIPITATION. ADDITIONAL SHOWERS AND THUNDERSTORMS WILL 
DEVELOP ACROSS THE REGION THROUGH 8 PM MDT. ADDITIOANL RAINFALL OVER 
ALREADY SATURATED GROUND WILL WORSEN THE POTENTIAL FOR FLASH 
FLOODING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VIRGINIA AND
ROBIN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
POCATELLO.

&&

LAT...LON 4262 11266 4264 11195 4263 11192 4253 11191
      4252 11190 4244 11188 4241 11190 4226 11191
      4226 11199 4228 11199 4229 11218 4211 11221
      4208 11280

$$

DMH
225 
WGUS75 KPIH 050129
FFSPIH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
729 PM MDT MON AUG 4 2014

IDC005-071-077-050138-
/O.CAN.KPIH.FF.W.0013.000000T0000Z-140805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ONEIDA ID-POWER ID-BANNOCK ID-
729 PM MDT MON AUG 4 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN BANNOCK...
SOUTHEASTERN POWER AND ONEIDA COUNTIES...

THE THREAT FOR HEAVY RAINFALL HAS MOVED NORTH OF THE WARNED AREA 
THOUGH MINOR RUNOFF MAY CONTINUE. REMAIN ALERT FOR PONDING OF WATER 
ON ROADWAYS AND IN LOW LYING AREAS. 

LAT...LON 4262 11266 4264 11195 4263 11192 4253 11191
      4252 11190 4244 11188 4241 11190 4226 11191
      4226 11199 4228 11199 4229 11218 4211 11221
      4208 11280

$$

DMH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 4:05 PM MDTFlash Flood WarningPIHCassia, Oneida, Power3 hr
Aug 4, 5:22 PM MDTFlash Flood WarningPIHMadison, Teton3 hr
Aug 4, 5:55 PM MDTFlash Flood WarningPIHFremont3 hr

Nearby

Flash Flood Warnings in Idaho, 2014Every 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.