Alert archive / California / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 8, NWS Sacramento, CA

July 1, 2013Alpine County, Amador County, El Dorado County, California

NWS Sacramento, CA issued this severe thunderstorm warning at Jul 1, 2013, 5:05 PM PDT for Alpine County, Amador County, El Dorado County, California. It was in force for 25 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: Jul 1, 2013, 5:05 PM PDT (00:05 UTC)
Expired: Jul 1, 2013, 5:30 PM PDT
In force: 25 min
Issued by: NWS Sacramento, CA
Area: Storm-based polygon

Counties Alpine County, CA, Amador County, CA, El Dorado County, CA

The radar

The Sacramento radar (KDAX), 118 km from the middle of the area, began a volume at 00:08 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 00:00Z, 0.1 hours before the alert went out and 213 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4403 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Jul 1, 4:17 PM PDT, 48 minutes earlier.

Area forecast discussion, Jul 1, 4:17 PM PDT, 48 minutes before

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Hazardous weather outlook, Jul 1, 3:40 AM PDT, 13 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SACRAMENTO CA
340 AM PDT MON JUL 1 2013

CAZ013>019-063-064-066>069-021400-
SHASTA LAKE AREA/NORTHERN SHASTA COUNTY-
BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY-
CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY-
CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY-
MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES-
CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE-
EAST FOOTHILLS/NORTH SACRAMENTO VALLEY-
WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA-
340 AM PDT MON JUL 1 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA.

.DAY ONE...TODAY

HOT TEMPERATURES WILL CONTINUE TODAY WITH RECORD HIGHS POSSIBLE MANY
AREAS. WARM OVERNIGHT LOWS WILL BRING LIMITED RELIEF.

* EXCESSIVE HEAT WARNING.....SEE WWUS76 KSTO - NPWSTO FOR DETAILS *

.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY

SIGNIFICANT HEAT WAVE CONTINUES THROUGH MUCH OF THE WEEK. WIDESPREAD
TRIPLE DIGIT HEAT IS EXPECTED ACROSS THE VALLEY AND PARTS OF THE
MOUNTAINS WITH RECORD HIGH TEMPERATURES. APPEARS THAT THE HEAT WAVE
WILL PEAK TUESDAY AND WEDNESDAY WITH ONLY SLIGHT COOLING FOR THE
FOURTH OF JULY HEADING INTO THE WEEKEND.

* EXCESSIVE HEAT WARNING.....SEE WWUS76 KSTO - NPWSTO FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.

In the hours before

Special weather statement, Jul 1, 3:32 PM PDT, 1 hour 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
332 PM PDT MON JUL 1 2013

CAZ069-012315-
WEST SLOPE NORTHERN SIERRA NEVADA CA-
332 PM PDT MON JUL 1 2013

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL ALPINE COUNTY IN CENTRAL CALIFORNIA
  NORTH CENTRAL TUOLUMNE COUNTY IN CENTRAL CALIFORNIA

UNTIL 415 PM PDT

AT 329 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR KENNEDY MEADOW..MOVING NORTHWEST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS
STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.
BOATERS SHOULD SEEKS THE SAFE HARBOR IF THREATENING WEATHER
APPROACHES.

LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHERN TUOLUMNE COUNTY...
  RURAL SOUTHEASTERN ALPINE COUNTY...
  RURAL SOUTHERN ALPINE COUNTY...

LAT...LON 3829 11966 3841 11986 3850 11973 3844 11966
      3841 11964 3835 11963
TIME...MOT...LOC 2232Z 131DEG 10KT 3839 11973

RB

Special weather statement, Jul 1, 4:55 PM PDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 12:17 PM PDT	Fire Weather Watch	STO		15 hr
Jul 2, 4:01 PM PDT	Special Weather Statement	STO	Plumas	44 min
Jul 2, 4:37 PM PDT	Special Weather Statement	STO	Plumas	38 min

Nearby

Severe Thunderstorm Warnings in California, 2013 Every 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.