Alert archive / Oregon / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 4, NWS Medford, OR

April 9, 2026Coos County, Douglas County, Oregon

NWS Medford, OR issued this severe thunderstorm warning at Apr 9, 2026, 2:48 PM PDT for Coos County, Douglas County, Oregon. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 9, 2026, 2:48 PM PDT (21:48 UTC)
Expired: Apr 9, 2026, 3:15 PM PDT
In force: 27 min
Issued by: NWS Medford, OR
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Coos County, OR, Douglas County, OR

The radar

The Medford radar (KMAX), 149 km from the middle of the area, began a volume at 21:50 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

Salem/Mcnary, OR (KSLE), launched 12:00Z, 9.8 hours before the alert went out and 194 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: 2100 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 36 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 9, 11:47 AM PDT, 3 hours 1 minute earlier.

Area forecast discussion, Apr 9, 11:47 AM PDT, 3 hours 1 minute before

Area Forecast Discussion
National Weather Service Medford OR
1147 AM PDT Thu Apr 9 2026

.DISCUSSION...Radar echos are increasing in density this late
morning ahead of this cut off low. We'll see more thunderstorms
develop this afternoon and evening as the atmosphere destabilizes.
Latest forecasts still showing 500 J/kg of convective available
potential energy for storm updrafts based off of the KMFR HRRR
forecast sounding. Upper level shear also looks pretty good for
our forecast area, so the 5-10% marginal risk of severe
thunderstorms for areas west of the Cascades seems on point from
SPC this afternoon.

The cutoff low will nudge close to shore overnight, although
conditions will dry out away from the coast as an embedded
shortwave rotates around the low. Models seem fairly confident in
this and the probability of precipitation drops to 5% overnight
for locations away from the coast. We'll likely see more valley
stratus and some patchy fog fill in if we clear out enough
overnight.

By Friday, the focus remains on showers and thunderstorms as the
cutoff low moves further inland. It looks like the chances for
severe thunderstorms are lower compared to Thursday, although the
coverage of thunderstorms and the probability of lightning within
20 km of any point will remain elevated(30-60%) depending on
exact location.

This cutoff low will eventually become caught up in the upper
level flow and move farther east ahead of the next trough in the
Pacific. The main impact to our forecast area will be the
continued chance of precipitation and the chances for some snow on
the mountains. This won't be a massive snow event, but the higher
terrain(6000ft+) could see 3 to 8 inches of new snow by Sunday
evening. The Warner mountains are popping out on our risk maps and
those ridges and higher peaks are forecast to see more snow than
the Cascades.

Heading into next week, nothing really stood out on the extreme
forecast index(EFI). There are some hints at another trough
sliding down the north west, which would lead to cooler more
unstable air and more showers for the forecast region. The
probability of precipitation increases around Tuesday and
Wednesday during this time with a 50 to 60 percent chance of
precipitation. 10% of the ENS members show the Cascades seeing
another 3-6 inches of snow with this northwest flow and cold
front around Wednesday. So there is still a chance to get some
more snow in the mountains here in early April.

&&

.AVIATION...09/12Z TAFs...Still some LIFR ceilings in the valleys
this morning. Those will clear out by the afternoon hours as the sun
mixes the boundary layer. Thunderstorms are the main concern this
afternoon and they will increase in coverage across the forecast
area. The area of highest concern will be around Josephine County
into Douglas County. Those areas will have a small(5-10%) chance of
severe hail or winds. Other locations have a chance at relatively
weaker storms.

Shower and thunderstorm activity will diminish after sunset, but
showers are likely to continue during the overnight hours. Valley
fog remains possible overnight.

&&

.MARINE...Updated 130 AM PDT Thursday, April 9, 2026...For the
remainder of the week, breezy north winds will persist, generally
remaining below advisory criteria. Showers and thunderstorms will be
possible over the waters during the afternoons and evenings through
Friday. The upper level pattern transitions over the weekend,
bringing less thunderstorms and more widespread shower activity into
early next week. Seas are likely to remain below advisory criteria
early next week while breezy winds become westerly and seas
transition to northwest swell dominated.

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...None.

CA...None.

PACIFIC COASTAL WATERS...None.

&&

In the hours before

Special weather statement, Apr 9, 1:45 PM PDT, 1 hour 3 minutes before

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Special weather statement, Apr 9, 1:51 PM PDT, 57 minutes before

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Special weather statement, Apr 9, 2:13 PM PDT, 35 minutes before

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Special weather statement, Apr 9, 2:33 PM PDT, 15 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 1:45 PM PDT	Special Weather Statement	MFR		30 min
Apr 9, 1:51 PM PDT	Special Weather Statement	MFR	Coos	24 min
Apr 9, 2:13 PM PDT	Special Weather Statement	MFR	Coos	32 min
Apr 9, 2:24 PM PDT	Severe Thunderstorm Warning	MFR	Coos, Douglas	25 min
Apr 9, 2:33 PM PDT	Special Weather Statement	MFR	Josephine	27 min
Apr 9, 3:06 PM PDT	Special Weather Statement	MFR	Douglas	24 min
Apr 9, 3:16 PM PDT	Severe Thunderstorm Warning	MFR	Coos, Douglas	29 min
Apr 9, 3:30 PM PDT	Special Weather Statement	MFR	Douglas	30 min
Apr 9, 3:40 PM PDT	Severe Thunderstorm Warning	MFR	Coos, Douglas	22 min
Apr 9, 3:45 PM PDT	Special Weather Statement	MFR	Jackson	30 min
Apr 9, 3:54 PM PDT	Special Weather Statement	MFR	Douglas	36 min
Apr 9, 4:13 PM PDT	Severe Thunderstorm Warning	MFR	Jackson	32 min
Apr 9, 4:40 PM PDT	Special Weather Statement	MFR	Douglas	35 min
Apr 9, 12:48 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	27 min
Apr 9, 1:12 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	33 min
Apr 9, 4:00 PM PDT	Special Weather Statement	MFR	Siskiyou	30 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2026 Every severe thunderstorm warning in 2026

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.