Alert archive / Washington / Special Weather Statements in 2012

Special Weather Statement, NWS Spokane, WA

July 16, 2012Whitman County, Washington

NWS Spokane, WA issued this special weather statement at Jul 16, 2012, 12:52 AM PDT for Whitman County, Washington. It was in force for 38 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: Jul 16, 2012, 12:52 AM PDT (07:52 UTC)
Expired: Jul 16, 2012, 1:30 AM PDT
In force: 38 min
Issued by: NWS Spokane, WA

County Whitman County, WA

The radar

The Spokane radar (KOTX), 93 km from the middle of the area, began a volume at 07:52 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

Spokane, WA (KOTX), launched 00:00Z, 7.9 hours before the alert went out and 145 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: 379 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1448 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

274 
WWUS86 KOTX 160752
SPSOTX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1252 AM PDT MON JUL 16 2012

WAZ033-035-160830-
WHITMAN WA-ADAMS WA-
1252 AM PDT MON JUL 16 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL ADAMS COUNTY IN EAST CENTRAL WASHINGTON
  WESTERN WHITMAN COUNTY IN EASTERN WASHINGTON

UNTIL 130 AM PDT

AT 1247 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTHEAST OF LA CROSSE..MOVING NORTH AT
25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE 
EXPECTED WITH THIS STORM...ALONG WITH TORRENTIAL DOWNPOURS AND 
FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
   LA CROSSE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4714 11828 4725 11781 4671 11767 4670 11769
      4670 11774 4665 11777 4663 11782
TIME...MOT...LOC 0752Z 162DEG 24KT 4676 11781

$$

SB

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 Spokane, WA wrote its last area forecast discussion before this special weather statement went out at Jul 15, 11:04 PM PDT, 1 hour 48 minutes earlier.

Area forecast discussion, Jul 15, 11:04 PM PDT, 1 hour 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1104 PM PDT Sun Jul 15 2012

.SYNOPSIS...
Slow moving thunderstorms will bring locally heavy rain and the
potential for localized flooding to portions eastern Washington
tonight. Upper level low pressure will remain over the Pacific
Northwest Monday, Tuesday and Wednesday bringing humid conditions
and the chance for thunderstorms. Drier weather should return to
the region Thursday or Friday through next weekend.

&&

.DISCUSSION...
Main update was to adjust PoPs across the Palouse and eastern
Columbia Basin. Radar mosaic shows an area of showers and
thunderstorms moving north out of northeast Oregon. The RUC has the
best handle on these storms and indicates that this area will take
a turn to the northwest overnight. Continued easterly low level
flow will keep the threat of showers and a few thunderstorms going
over the western half of the forecast area through Monday evening.
The heaviest rainfall has diminished so all flood products have
been taken down or allowed to expire. /Kelch

&&

.AVIATION...
06Z TAFS: Scattered showers and thunderstorms will affect eastern
WA overnight. The most favored area will be west of KLWS/KPUW. The
main hazard from these storms will be very heavy rainfall and
possibly small hail. These storms will move northwest, affecting
the KMWH/KEAT sites by 10Z. Another round of convection will
develop Monday afternoon. /EK

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        60  87  65  88  65  83 /  20  20  30  20  40  50
Coeur d'Alene  58  86  62  87  62  82 /  10  20  30  40  40  50
Pullman        56  84  62  85  60  81 /  30  20  40  40  50  40
Lewiston       65  92  68  94  68  90 /  20  20  30  30  30  40
Colville       57  88  61  89  62  86 /  10  20  20  40  40  50
Sandpoint      56  84  59  85  59  81 /  10  20  30  50  40  50
Kellogg        57  86  59  86  58  81 /  10  20  30  40  40  60
Moses Lake     59  88  65  94  65  88 /  30  30  30  20  20  40
Wenatchee      62  87  67  94  68  88 /  40  30  20  30  30  40
Omak           61  93  66  94  66  90 /  30  20  20  30  30  40

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...&&

Hazardous weather outlook, Jul 15, 10:06 AM PDT, 14 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
1006 AM PDT SUN JUL 15 2012

IDZ001>004-WAZ036>038-161715-
NORTHERN PANHANDLE-COEUR D'ALENE AREA-IDAHO PALOUSE-
CENTRAL PANHANDLE MOUNTAINS-SPOKANE AREA-NORTHEAST MOUNTAINS-
OKANOGAN HIGHLANDS-
1006 AM PDT SUN JUL 15 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO...
NORTH CENTRAL WASHINGTON AND NORTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

IDZ026-027-WAZ031>035-041-043-044-161715-
LEWISTON AREA-LEWIS AND SOUTHERN NEZ PERCE COUNTIES-
NORTHEAST BLUE MOUNTAINS-LOWER GARFIELD AND ASOTIN COUNTIES-
WASHINGTON PALOUSE-MOSES LAKE AREA-UPPER COLUMBIA BASIN-
WENATCHEE AREA-OKANOGAN VALLEY-WATERVILLE PLATEAU-
1006 AM PDT SUN JUL 15 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO...CENTRAL WASHINGTON...EAST CENTRAL WASHINGTON...NORTH
CENTRAL WASHINGTON AND SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

WAZ042-161715-
EAST SLOPES NORTHERN CASCADES-
1006 AM PDT SUN JUL 15 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

SLOW MOVING THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON
AND EVENING OVER THE EAST SLOPES OF THE NORTHERN CASCADES.
LOCALLY HEAVY RAIN WILL BE POSSIBLE WITH THESE THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 15, 7:20 PM PDT, 5 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
720 PM PDT SUN JUL 15 2012

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

0610 PM     TSTM WND DMG     9 SW ANATONE            46.04N 117.25W
07/15/2012                   ASOTIN             WA   TRAINED SPOTTER

            SEVERAL BRANCHES OF LARGE TREE BROKEN OFF.

&&

KELCH

Special weather statement, Jul 16, 12:52 AM PDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1252 AM PDT MON JUL 16 2012

WAZ033-035-160830-
WHITMAN WA-ADAMS WA-
1252 AM PDT MON JUL 16 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL ADAMS COUNTY IN EAST CENTRAL WASHINGTON
  WESTERN WHITMAN COUNTY IN EASTERN WASHINGTON

UNTIL 130 AM PDT

AT 1247 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTHEAST OF LA CROSSE..MOVING NORTH AT
25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH TORRENTIAL DOWNPOURS AND
FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
   LA CROSSE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4714 11828 4725 11781 4671 11767 4670 11769
      4670 11774 4665 11777 4663 11782
TIME...MOT...LOC 0752Z 162DEG 24KT 4676 11781

SB

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 6:08 PM PDT	Special Weather Statement	OTX	Ferry	52 min
Jul 15, 6:23 PM PDT	Areal Flood Advisory	OTX	Ferry, Okanogan, Stevens	3 hr
Jul 15, 6:26 PM PDT	Severe Thunderstorm Warning	OTX	Asotin	29 min
Jul 16, 1:19 AM PDT	Severe Thunderstorm Warning	OTX	Adams, Whitman	41 min
Jul 16, 2:51 PM PDT	Flash Flood Watch	OTX	Benewah, Kootenai, Latah, Shoshone	8 hr

Nearby

Special Weather Statements in Washington, 2012 Every special weather statement in 2012

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.