Alert archive / California / Areal Flood Advisories in 2015

Areal Flood Advisory 21, NWS San Diego, CA

July 19, 2015Riverside County, San Diego County, California

NWS San Diego, CA issued this areal flood advisory at Jul 19, 2015, 1:27 PM PDT for Riverside County, San Diego County, California. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 19, 2015, 1:27 PM PDT (20:27 UTC)
Expired: Jul 19, 2015, 6:30 PM PDT
In force: 5 hr
Issued by: NWS San Diego, CA
Area: Storm-based polygon

Counties Riverside County, CA, San Diego County, CA

The radar

The San Diego radar (KNKX), 80 km from the middle of the area, began a volume at 20:28 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, 8.5 hours before the alert went out and 100 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: 335 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1500 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 65 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 areal flood advisory 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 areal flood advisory went out at Jul 19, 11:10 AM PDT, 2 hours 17 minutes earlier.

Area forecast discussion, Jul 19, 11:10 AM PDT, 2 hours 17 minutes before

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In the hours before

Local storm report, Jul 19, 12:41 PM PDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1241 PM PDT SUN JUL 19 2015

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

1240 PM     HAIL             WRIGHTWOOD              34.36N 117.63W
07/19/2015  E0.25 INCH       SAN BERNARDINO     CA   TRAINED SPOTTER

            SPOTTER REPORTED QUARTER INCH HAIL AND HEAVY
            RAIN.

&&

SHARRISO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 12:24 PM PDT	Areal Flood Advisory	SGX	San Diego	8 hr
Jul 19, 1:55 PM PDT	Severe Thunderstorm Warning	SGX	Riverside	65 min
Jul 19, 1:58 PM PDT	Flash Flood Warning	SGX	San Diego	3 hr
Jul 19, 2:37 PM PDT	Areal Flood Advisory	SGX	San Diego	4 hr
Jul 19, 2:50 PM PDT	Flash Flood Warning	SGX	Riverside, San Bernardino	3 hr
Jul 19, 3:07 PM PDT	Flash Flood Warning	SGX	San Diego	3 hr
Jul 19, 3:16 PM PDT	Areal Flood Advisory	SGX	San Bernardino	3 hr
Jul 19, 3:34 PM PDT	Flash Flood Warning	SGX	Riverside, San Bernardino	5 hr
Jul 19, 4:35 PM PDT	Flash Flood Warning	SGX	Riverside	5 hr
Jul 19, 4:40 PM PDT	Flash Flood Warning	SGX	Orange	6 hr

Nearby

Areal Flood Advisories in California, 2015 Every areal flood advisory in 2015

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.