Alert archive / Idaho / Flash Flood Warnings in 2014

Flash Flood Warning 3, NWS Missoula, MT

August 12, 2014Lemhi County, Idaho

NWS Missoula, MT issued this flash flood warning at Aug 12, 2014, 6:26 PM MDT for Lemhi County, Idaho. It was in force for 4 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 12, 2014, 6:26 PM MDT (00:26 UTC)
Expired
Aug 12, 2014, 10:30 PM MDT
In force
4 hr
Issued by
NWS Missoula, MT
Area
Storm-based polygon
Flood severity
None

County Lemhi County, ID

The radar

The Missoula radar (KMSX), 181 km from the middle of the area, began a volume at 00:29 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 00:00Z, 0.4 hours before the alert went out and 263 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 00:00Z on 2014-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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, Boise Airport, ID at 00:00Z on 2014-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.193958Sfc1 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
9 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
2219 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
152 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.

590 
WGUS55 KMSO 130026
FFWMSO
IDC059-130430-
/O.NEW.KMSO.FF.W.0003.140813T0026Z-140813T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
626 PM MDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HWY 93 4TH OF JULY CREEK AND KRILEY GULCH...INDIAN CREEK IN THE
  MUSTANG BURN...NORTH FORK...SPRING CREEK IN THE MUSTANG BURN IN
  NORTHERN LEMHI COUNTY IN EAST CENTRAL IDAHO...

* UNTIL 1030 PM MDT.

* AT 624 PM MDT...DOPPLER RADAR INDICATED VERY HEAVY RAIN OVER THE
  WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...NORTH FORK...SHOUP...SPRING CREEK IN
  THE MUSTANG BURN...INDIAN CREEK IN THE MUSTANG BURN AND HWY 93 4TH
  OF JULY CREEK AND KRILEY GULCH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING...MUD AND DEBRIS FLOWS ARE
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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4545 11436 4549 11422 4552 11412 4548 11397
      4537 11384 4531 11395 4534 11403 4534 11427

$$
1 follow-up statement
364 
WGUS75 KMSO 130253
FFSMSO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
853 PM MDT TUE AUG 12 2014

IDC059-130303-
/O.CAN.KMSO.FF.W.0003.000000T0000Z-140813T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEMHI ID-
853 PM MDT TUE AUG 12 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN LEMHI
COUNTY...

LAT...LON 4545 11436 4549 11422 4552 11412 4548 11397
      4537 11384 4531 11395 4534 11403 4534 11427

$$

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 13, 12:03 PM MDTFlash Flood WatchMSOIdaho, Lemhi6 hr
Aug 13, 4:33 PM MDTFlash Flood WarningMSOLemhi57 min

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.