Alert archive / California / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 2, NWS San Francisco Bay Area, CA

April 27, 2016Monterey County, California

NWS San Francisco Bay Area, CA issued this severe thunderstorm warning at Apr 27, 2016, 2:23 PM PDT for Monterey 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 outline as issued.

The facts

Issued: Apr 27, 2016, 2:23 PM PDT (21:23 UTC)
Expired: Apr 27, 2016, 2:48 PM PDT
In force: 25 min
Issued by: NWS San Francisco Bay Area, CA
Area: Storm-based polygon

County Monterey County, CA

The radar

The San Joaquin Valley radar (KHNX), 107 km from the middle of the area, began a volume at 21:22 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

Vandenberg AFB, CA (KVBG), launched 12:00Z, 9.4 hours before the alert went out and 134 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: 1289 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

569 
WUUS56 KMTR 272123
SVRMTR
CAC053-272200-
/O.NEW.KMTR.SV.W.0002.160427T2123Z-160427T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
223 PM PDT WED APR 27 2016

THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED
A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MONTEREY COUNTY IN CENTRAL CALIFORNIA...

* UNTIL 300 PM PDT

* AT 222 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR BRADLEY...OR 11 MILES
  NORTHEAST OF LAKE SAN ANTONIO...AND MOVING SOUTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PARKFIELD AND BRADLEY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3597 12090 3601 12068 3588 12033 3579 12079
TIME...MOT...LOC 2122Z 301DEG 35KT 3593 12075 

$$

LARRY

1 follow-up statement

149 
WWUS56 KMTR 272148
SVSMTR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
248 PM PDT WED APR 27 2016

CAC053-272158-
/O.CAN.KMTR.SV.W.0002.000000T0000Z-160427T2200Z/
MONTEREY CA-
248 PM PDT WED APR 27 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTEREY COUNTY
IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER LIGHTNING...SMALL
HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3597 12090 3601 12068 3588 12033 3579 12079
TIME...MOT...LOC 2146Z 301DEG 35KT 3580 12048 

$$

LARRY

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 3:12 AM PDT	Small Craft Advisory	MTR		4 days
Apr 27, 1:45 PM PDT	Special Weather Statement	MTR	Monterey	30 min
Apr 27, 2:14 PM PDT	Special Weather Statement	MTR	Napa	46 min

Nearby

Severe Thunderstorm Warnings in California, 2016 Every severe thunderstorm warning in 2016

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.