Alert archive / California / Fire Weather Watches in 2021

Fire Weather Watch 17, NWS Medford, OR

July 15, 2021Modoc County, California

NWS Medford, OR issued this fire weather watch at Jul 15, 2021, 2:30 PM PDT for Modoc County, California. It took effect at Jul 17, 2021, 4:00 PM PDT. It was in force for .

The area

The counties it named.

The facts

Issued
Jul 15, 2021, 2:30 PM PDT (21:30 UTC)
In effect from
Jul 17, 2021, 4:00 PM PDT
Expired
Jul 16, 2021, 1:14 PM PDT
In force
Issued by
NWS Medford, OR

County Modoc County, CA

The radar

The Medford radar (KMAX), 174 km from the middle of the area, began a volume at 21:30 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 12:00Z, 9.5 hours before the alert went out and 310 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-pSkew-T log-p diagram, Reno, NV at 12:00Z on 2021-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 12:00Z on 2021-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3222 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
100 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 fire weather 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 fire weather watch went out at Jul 15, 2:27 PM PDT, 3 minutes earlier.

Area forecast discussion, Jul 15, 2:27 PM PDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 8:25 PM PDTSpecial Weather StatementMFRLake50 min
Jul 15, 2:22 AM PDTFire Weather WatchMFRModoc12 hr
Jul 15, 2:22 AM PDTRed Flag WarningMFRModoc18 hr
Jul 15, 2:30 PM PDTRed Flag WarningMFRModoc30 hr

Nearby

Fire Weather Watches in California, 2021Every fire weather watch in 2021

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.