Alert archive / California / Flash Flood Watches in 2015

Flash Flood Watch 5, NWS Reno, NV

July 7, 20157 counties in Nevada; 9 counties in California

NWS Reno, NV issued this flash flood watch at Jul 7, 2015, 10:04 PM PDT for 7 counties in Nevada; 9 counties in California. It took effect at Jul 8, 2015, 10:00 AM PDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jul 7, 2015, 10:04 PM PDT (05:04 UTC)
In effect from: Jul 8, 2015, 10:00 AM PDT
Expired: Jul 8, 2015, 8:42 PM PDT
In force: 11 hr
Issued by: NWS Reno, NV
Flood severity: None

Counties Alpine County, CA, El Dorado County, CA, Lassen County, CA, Modoc County, CA, Mono County, CA, Nevada County, CA, Placer County, CA, Plumas County, CA, Sierra County, CA, Churchill County, NV, Douglas County, NV, Lyon County, NV, Mineral County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 39 km from the middle of the area, began a volume at 05:05 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

Medford/Jackson, OR (KMFR), launched 00:00Z, 5.1 hours before the alert went out and 407 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: 608 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 2822 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 57 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 Reno, NV wrote its last area forecast discussion before this flash flood watch went out at Jul 7, 7:06 PM PDT, 2 hours 58 minutes earlier.

Area forecast discussion, Jul 7, 7:06 PM PDT, 2 hours 58 minutes before

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In the hours before

Local storm report, Jul 7, 4:23 PM PDT, 5 hours 41 minutes before

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Special weather statement, Jul 7, 4:41 PM PDT, 5 hours 23 minutes before

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Local storm report, Jul 7, 5:33 PM PDT, 4 hours 31 minutes before

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Special weather statement, Jul 7, 5:34 PM PDT, 4 hours 30 minutes before

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Local storm report, Jul 7, 5:59 PM PDT, 4 hours 5 minutes before

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Local storm report, Jul 7, 6:00 PM PDT, 4 hours 4 minutes before

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The office that day

Everything else NWS Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 5:34 PM PDT	Special Weather Statement	REV		41 min
Jul 8, 12:12 PM PDT	Special Weather Statement	REV	Churchill	48 min
Jul 8, 12:41 PM PDT	Severe Thunderstorm Warning	REV	Douglas	49 min
Jul 8, 1:18 PM PDT	Special Weather Statement	REV	Lander	42 min
Jul 8, 1:25 PM PDT	Special Weather Statement	REV	Douglas	35 min
Jul 8, 1:37 PM PDT	Flash Flood Warning	REV	Douglas, Washoe	3 hr
Jul 8, 1:37 PM PDT	Special Weather Statement	REV		38 min
Jul 8, 2:05 PM PDT	Special Weather Statement	REV	Storey	40 min
Jul 8, 2:26 PM PDT	Special Weather Statement	REV	Pershing	64 min
Jul 8, 2:30 PM PDT	Special Weather Statement	REV	Lyon	45 min
Jul 8, 2:32 PM PDT	Severe Thunderstorm Warning	REV	Storey, Washoe	43 min
Jul 8, 2:47 PM PDT	Flash Flood Warning	REV	Pershing	3 hr
Jul 8, 3:01 PM PDT	Special Weather Statement	REV	Lyon	44 min
Jul 8, 3:06 PM PDT	Severe Thunderstorm Warning	REV	Storey, Washoe	39 min
Jul 8, 3:19 PM PDT	Flash Flood Warning	REV	Washoe	3 hr
Jul 8, 3:19 PM PDT	Flash Flood Warning	REV	Lyon, Mineral	3 hr
Jul 8, 3:26 PM PDT	Special Weather Statement	REV	Mineral	34 min
Jul 8, 3:32 PM PDT	Special Weather Statement	REV	Lyon	43 min
Jul 8, 3:54 PM PDT	Special Weather Statement	REV		36 min
Jul 8, 4:10 PM PDT	Severe Thunderstorm Warning	REV	Churchill	35 min
Jul 7, 5:55 PM PDT	Areal Flood Advisory	REV	Alpine	3 hr
Jul 8, 11:30 AM PDT	Special Weather Statement	REV	Alpine	45 min
Jul 8, 12:22 PM PDT	Special Weather Statement	REV	Alpine, Mono	53 min
Jul 8, 12:38 PM PDT	Flash Flood Warning	REV	Alpine, Mono	3 hr
Jul 8, 1:02 PM PDT	Severe Thunderstorm Warning	REV	Plumas	28 min
Jul 8, 1:09 PM PDT	Special Weather Statement	REV	Sierra	51 min
Jul 8, 1:36 PM PDT	Special Weather Statement	REV	Sierra	24 min
Jul 8, 1:48 PM PDT	Flash Flood Warning	REV	Mono	3 hr
Jul 8, 1:51 PM PDT	Flash Flood Warning	REV	Nevada, Sierra	3 hr
Jul 8, 1:58 PM PDT	Severe Thunderstorm Warning	REV	Plumas	47 min
Jul 8, 2:04 PM PDT	Special Weather Statement	REV	Plumas	26 min
Jul 8, 3:10 PM PDT	Special Weather Statement	REV	Lassen	50 min
Jul 8, 4:01 PM PDT	Special Weather Statement	REV	Lassen	44 min
Jul 8, 4:24 PM PDT	Severe Thunderstorm Warning	REV	Lassen	36 min

Nearby

Flash Flood Watches in California, 2015 Flash Flood Watches in Nevada, 2015 Every flash flood watch 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.