Alert archive / California / Flash Flood Watches in 2014

Flash Flood Watch 3, NWS San Diego, CA

July 5, 2014Riverside County, San Bernardino County, San Diego County, California

NWS San Diego, CA issued this flash flood watch at Jul 5, 2014, 9:53 AM PDT for Riverside County, San Bernardino County, San Diego County, California. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 5, 2014, 9:53 AM PDT (16:53 UTC)
Expired: Jul 5, 2014, 4:36 PM PDT
In force: 7 hr
Issued by: NWS San Diego, CA
Flood severity: None

Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 16:55 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

San Diego, CA (KNKX), launched 12:00Z, 4.9 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1900 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: -6 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 flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Diego, CA wrote its last area forecast discussion before this flash flood watch went out at Jul 5, 9:50 AM PDT, 3 minutes earlier.

Area forecast discussion, Jul 5, 9:50 AM PDT, 3 minutes before

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In the hours before

Local storm report, Jul 5, 9:34 AM PDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
934 AM PDT SAT JUL 05 2014

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

0145 PM     TSTM WND DMG     2 SW YUCAIPA            34.01N 117.07W
07/04/2014                   SAN BERNARDINO     CA   FIRE DEPT/RESCUE

            TWO STRUCTURES DAMAGED. ONE ROOF COLAPSED AND ONE ROOF
            WITH WIND DAMAGE BETWEEN 130 PM PDT AND 2 PM PDT NEAR THE
            INTERSECTION OF CALIMESA AND INTERSTATE 10.

&&

JTHOMAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 5:01 PM PDT	Flash Flood Warning	SGX	San Bernardino	3 hr
Jul 5, 3:38 AM PDT	Areal Flood Advisory	SGX	Riverside	3 hr
Jul 5, 4:57 AM PDT	Areal Flood Advisory	SGX	San Bernardino	3 hr
Jul 5, 10:44 AM PDT	Flash Flood Warning	SGX	San Bernardino	3 hr
Jul 5, 12:43 PM PDT	Special Weather Statement	SGX	San Bernardino	47 min
Jul 5, 2:04 PM PDT	Flash Flood Warning	SGX	San Bernardino	3 hr

Nearby

Flash Flood Watches in California, 2014 Every flash flood watch 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.