Alert archive / California / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 10, NWS Sacramento, CA

August 11, 2014Nevada County, Placer County, Sierra County, California

NWS Sacramento, CA issued this severe thunderstorm warning at Aug 11, 2014, 4:44 PM PDT for Nevada County, Placer County, Sierra County, California. It was in force for 61 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: Aug 11, 2014, 4:44 PM PDT (23:44 UTC)
Expired: Aug 11, 2014, 5:45 PM PDT
In force: 61 min
Issued by: NWS Sacramento, CA
Area: Storm-based polygon

Counties Nevada County, CA, Placer County, CA, Sierra County, CA

The radar

The Beale AFB radar (KBBX), 85 km from the middle of the area, began a volume at 23:45 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

Reno, NV (KREV), launched 12:00Z, 11.7 hours before the alert went out and 214 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: 11 J/kg
Mixed-layer CIN: -363 J/kg
Mixed-layer LCL: 2604 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 172 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 Sacramento, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 4:24 PM PDT, 20 minutes earlier.

Area forecast discussion, Aug 11, 4:24 PM PDT, 20 minutes before

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In the hours before

Special weather statement, Aug 11, 2:02 PM PDT, 2 hours 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
202 PM PDT MON AUG 11 2014

CAZ013-014-066-068-112145-
BURNEY BASIN / EASTERN SHASTA COUNTY CA-NORTHEAST
FOOTHILLS/SACRAMENTO VALLEY CA-SHASTA LAKE AREA / NORTHERN SHASTA
COUNTY CA-WESTERN PLUMAS COUNTY/LASSEN PARK CA-
202 PM PDT MON AUG 11 2014

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL SHASTA COUNTY IN NORTHERN CALIFORNIA

UNTIL 245 PM PDT

AT 200 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES EAST OF HILLCREST..MOVING NORTHWEST AT 20
MPH.

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

LOCATIONS IMPACTED INCLUDE...
   HILLCREST... MONTGOMERY CREEK AND  ROUND MOUNTAIN...
   BIG BEND...

LAT...LON 4104 12196 4096 12156 4082 12158 4077 12167
      4076 12202
TIME...MOT...LOC 2102Z 114DEG 20KT 4087 12179

SHOEMAKER

Local storm report, Aug 11, 2:03 PM PDT, 2 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
203 PM PDT MON AUG 11 2014

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

0202 PM     HAIL             1 SSE BURNEY            40.87N 121.66W
08/11/2014  M0.25 INCH       SHASTA             CA   TRAINED SPOTTER

            A TRAINED SPOTTER REPORTED PEA SIZE HAIL IN
            BURNEY.

&&

NWS SACRAMENTO CA
IRIS SYSTEM

Local storm report, Aug 11, 2:07 PM PDT, 2 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
207 PM PDT MON AUG 11 2014

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

0205 PM     HAIL             1 SSE BURNEY            40.87N 121.66W
08/11/2014  M1.00 INCH       SHASTA             CA   TRAINED SPOTTER

            TRAINED SPOTTER HAS REPORTED QUARTER-SIZE
            HAIL IN BURNEY.

&&

NWS SACRAMENTO CA
IRIS SYSTEM

Local storm report, Aug 11, 2:08 PM PDT, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
208 PM PDT MON AUG 11 2014

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

0208 PM     HAIL             1 ESE BURNEY            40.88N 121.65W
08/11/2014  M0.75 INCH       SHASTA             CA   TRAINED SPOTTER

            TRAINED SPOTTER IN BURNEY HAS REPORTED
            PENNY-SIZE HAIL.

&&

NWS SACRAMENTO CA
IRIS SYSTEM

Local storm report, Aug 11, 2:53 PM PDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
253 PM PDT MON AUG 11 2014

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

0230 PM     HAIL             5 SSE CASSEL            40.85N 121.52W
08/11/2014  M1.00 INCH       SHASTA             CA   TRAINED SPOTTER

            A TRAINED SPOTTER REPORTED QUARTER-SIZE HAIL
            NEAR BURNEY.

&&

NWS SACRAMENTO CA
IRIS SYSTEM

Local storm report, Aug 11, 3:21 PM PDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
321 PM PDT MON AUG 11 2014

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

0245 PM     HAIL             5 SSW CASSEL            40.84N 121.57W
08/11/2014  M1.75 INCH       SHASTA             CA   FIRE DEPT/RESCUE

            A FIREFIGHTER REPORTED GOLF BALL SIZE HAIL
            AT THE EILER FIRE.

&&

NWS SACRAMENTO CA
IRIS SYSTEM

The office that day

Everything else NWS Sacramento, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 11:37 AM PDT	Special Weather Statement	STO	El Dorado, Nevada, Placer	53 min
Aug 11, 12:33 PM PDT	Special Weather Statement	STO	Nevada	42 min
Aug 11, 12:45 PM PDT	Special Weather Statement	STO		45 min
Aug 11, 1:15 PM PDT	Special Weather Statement	STO	Sierra	45 min
Aug 11, 2:02 PM PDT	Special Weather Statement	STO	Shasta	43 min
Aug 11, 2:07 PM PDT	Severe Thunderstorm Warning	STO	Shasta	53 min
Aug 11, 2:17 PM PDT	Severe Thunderstorm Warning	STO	Shasta	43 min
Aug 11, 2:59 PM PDT	Severe Thunderstorm Warning	STO	Shasta	46 min
Aug 11, 3:53 PM PDT	Severe Thunderstorm Warning	STO	Sierra	39 min

Nearby

Severe Thunderstorm Warnings in California, 2014 Every severe thunderstorm 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.