Alert archive / California / Flash Flood Watches in 2017

Flash Flood Watch 1, NWS Medford, OR

February 7, 2017Siskiyou County, California

NWS Medford, OR issued this flash flood watch at Feb 7, 2017, 4:58 PM PST for Siskiyou County, California. It took effect at Feb 8, 2017, 10:00 AM PST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Feb 7, 2017, 4:58 PM PST (00:58 UTC)
In effect from: Feb 8, 2017, 10:00 AM PST
Expired: Feb 9, 2017, 3:54 PM PST
In force: 30 hr
Issued by: NWS Medford, OR
Flood severity: None

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 00:57 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, 1.0 hours before the alert went out and 430 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: 1319 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 206 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 Medford, OR wrote its last area forecast discussion before this flash flood watch went out at Feb 7, 3:31 PM PST, 1 hour 27 minutes earlier.

Area forecast discussion, Feb 7, 3:31 PM PST, 1 hour 27 minutes before

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In the hours before

Local storm report, Feb 7, 11:27 AM PST, 5 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1127 AM PST TUE FEB 7 2017

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

0900 AM     HEAVY RAIN       2 S MOUNT SHASTA        41.30N 122.32W
02/07/2017  M1.78 INCH       SISKIYOU           CA   TRAINED SPOTTER

            . THE DURATION OF THE HEAVY RAIN EVENT WAS
            24 HOURS.

&&

BS

Local storm report, Feb 7, 4:10 PM PST, 48 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
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        Please try again in a few minutes.
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The office that day

Everything else NWS Medford, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 7, 4:26 PM PST	River Flood Watch	MFR	Coos, Curry, Douglas	22 hr
Feb 7, 4:26 PM PST	River Flood Watch	MFR	Coos, Curry, Douglas	22 hr
Feb 8, 2:40 AM PST	Storm Warning	MFR		31 hr
Feb 8, 8:53 AM PST	High Surf Advisory	MFR	Coos, Curry, Douglas	30 hr
Feb 8, 1:44 PM PST	River Flood Warning	MFR	Coos	4 days
Feb 8, 1:44 PM PST	River Flood Warning	MFR	Coos	51 hr
Feb 8, 2:01 PM PST	River Flood Warning	MFR	Klamath	4 days
Feb 8, 2:46 PM PST	Hazardous Seas Warning	MFR		49 hr
Feb 8, 2:01 PM PST	River Flood Warning	MFR	Siskiyou	62 hr
Feb 8, 2:01 PM PST	River Flood Warning	MFR	Siskiyou	60 hr

Nearby

Flash Flood Watches in California, 2017 Every flash flood watch in 2017

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.