Alert archive / Idaho / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 23, NWS Boise, ID

September 5, 2013Canyon County, Owyhee County, Idaho; Malheur County, Oregon

NWS Boise, ID issued this severe thunderstorm warning at Sep 5, 2013, 2:02 PM MDT for Canyon County, Owyhee County, Idaho; Malheur County, Oregon. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 5, 2013, 2:02 PM MDT (20:02 UTC)
Expired
Sep 5, 2013, 2:45 PM MDT
In force
43 min
Issued by
NWS Boise, ID
Area
Storm-based polygon

Counties Canyon County, ID, Owyhee County, ID, Malheur County, OR

The radar

The Boise radar (KCBX), 63 km from the middle of the area, began a volume at 20:02 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 5, 1:35 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 8.0 hours before the alert went out and 71 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 2013-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 97 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 2013-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.19395878Sfc1 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
97 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1643 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Boise, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 5, 10:02 AM MDT, 4 hours earlier.

Area forecast discussion, Sep 5, 10:02 AM MDT, 4 hours before
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Hazardous weather outlook, Sep 5, 5:55 AM MDT, 8 hours 7 minutes before
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In the hours before

Special weather statement, Sep 5, 8:08 AM MDT, 5 hours 54 minutes before
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Local storm report, Sep 5, 9:19 AM MDT, 4 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
919 AM MDT THU SEP 05 2013

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

0852 AM     HEAVY RAIN       3 ENE FAREWELL BEND STA 44.33N 117.17W
09/05/2013  M0.76 INCH       WASHINGTON         ID   MESONET

            THUNDERSTORM CROSS DEAD-I RIDGE RAWS. WIND GUST 25 MPH.

0910 AM     HEAVY RAIN       MARSING                 43.55N 116.81W
09/05/2013  U0.00 INCH       OWYHEE             ID   TRAINED SPOTTER

            SPOTTER REPORTED HEAVY RAIN WITH A THUNDERSTORM.

&&

VMILLS
Local storm report, Sep 5, 9:48 AM MDT, 4 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
948 AM MDT THU SEP 05 2013

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

0925 AM     HEAVY RAIN       8 W MIDDLETON           43.71N 116.78W
09/05/2013  U0.00 INCH       CANYON             ID   TRAINED SPOTTER

            HEAVY RAIN AT INTERSECTION OF HIGHWAY 44 AND OLD HIGHWAY
            30.

0912 AM     HEAVY RAIN       3 NNE MCCHORD BUTTE     44.57N 117.05W
09/05/2013  M47.00 INCH      WASHINGTON         ID   MESONET

            THUNDERSTORM WIND GUST 41 MPH ON DENNETT CREEK RAWS ALONG
            WITH BRIEF HEAVY RAIN IN THE HOUR ENDING AT 912 AM. RAIN
            SINCE MIDNIGHT...0.81 INCHES.

&&

VMILLS
Local storm report, Sep 5, 11:51 AM MDT, 2 hours 11 minutes before
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Local storm report, Sep 5, 12:10 PM MDT, 1 hour 52 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
1210 PM MDT THU SEP 05 2013

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

0912 AM     HEAVY RAIN       3 NNE MCCHORD BUTTE     44.57N 117.05W
09/05/2013  M0.47 INCH       WASHINGTON         ID   MESONET

            THUNDERSTORM WIND GUST 41 MPH ON DENNETT CREEK RAWS ALONG
            WITH BRIEF HEAVY RAIN IN THE HOUR ENDING AT 912 AM. RAIN
            SINCE MIDNIGHT...0.81 INCHES.

&&

VMILLS
Special weather statement, Sep 5, 1:07 PM MDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
107 PM MDT THU SEP 5 2013

ORZ063-052000-
MALHEUR OR-
107 PM MDT THU SEP 5 2013

THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL MALHEUR COUNTY IN SOUTHEAST OREGON...

UNTIL 200 PM MDT/100 PM PDT/.

AT 1203 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 32 MILES NORTHEAST OF MCDERMITT...MOVING NORTH AT
30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

THE THUNDERSTORM WILL BE NEAR...
  FIVE POINTS AROUND 115 PM MDT...
  MOUSE TRAP BUTTE AROUND 130 PM MDT...
  GRASSY MOUNTAIN AROUND 135 PM MDT.

LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. TAKE SHELTER INSIDE A
BUILDING OR VEHICLE WHEN THUNDERSTORMS APPROACH. LIGHTNING CAN OCCUR
15 MILES OR MORE AWAY FROM THE CENTER OF A STORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

LAT...LON 4296 11747 4292 11702 4225 11724 4231 11757
TIME...MOT...LOC 1907Z 195DEG 27KT 4242 11739

VM

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 6:05 PM MDTFlash Flood WarningBOIGooding, Jerome, Twin Falls85 min
Sep 4, 6:17 PM MDTSpecial Weather StatementBOIAda43 min
Sep 4, 6:18 PM MDTSevere Thunderstorm WarningBOIGooding, Jerome, Twin Falls57 min
Sep 4, 7:03 PM MDTFlash Flood WarningBOIAda, Canyon, Owyhee117 min
Sep 4, 9:38 PM MDTFlash Flood WarningBOICamas112 min
Sep 5, 1:08 AM MDTSpecial Weather StatementBOIAdams, Gem, Payette, Washington52 min
Sep 5, 6:12 AM MDTSpecial Weather StatementBOI63 min
Sep 5, 8:08 AM MDTSpecial Weather StatementBOIWashington52 min
Sep 5, 1:07 PM MDTSpecial Weather StatementBOI53 min
Sep 5, 2:45 PM MDTSevere Thunderstorm WarningBOIAda, Canyon, Owyhee60 min
Sep 5, 3:12 PM MDTFlash Flood WarningBOICamas2 hr
Sep 5, 3:41 PM MDTFlash Flood WarningBOIOwyhee94 min
Sep 5, 3:43 PM MDTSevere Thunderstorm WarningBOIAda, Canyon, Owyhee62 min
Sep 5, 3:59 PM MDTAreal Flood AdvisoryBOIAda, Canyon3 hr
Sep 5, 4:11 PM MDTSevere Thunderstorm WarningBOIBoise, Gem, Payette, Valley, Washington64 min
Sep 5, 4:44 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls46 min
Sep 5, 4:52 PM MDTSevere Thunderstorm WarningBOIAdams, Gem, Valley, Washington38 min
Sep 5, 4:55 PM MDTFlash Flood WarningBOIAdams, Boise, Gem, Valley, Washington50 min
Sep 5, 5:05 PM MDTSevere Thunderstorm WarningBOIElmore, Gooding, Owyhee, Twin Falls40 min
Sep 5, 5:10 PM MDTSevere Thunderstorm WarningBOIBoise, Valley35 min
Sep 5, 5:23 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls37 min
Sep 5, 5:27 PM MDTSevere Thunderstorm WarningBOIAdams, Valley48 min
Sep 5, 5:55 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls50 min
Sep 5, 5:59 PM MDTAreal Flood AdvisoryBOIJerome, Twin Falls3 hr
Sep 4, 11:06 PM MDTAreal Flood WarningBOIHarney, Malheur6 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2013Severe Thunderstorm Warnings in Oregon, 2013Every severe thunderstorm warning in 2013

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.