Alert archive / Oregon / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Boise, ID

May 25, 2018Malheur County, Oregon; Owyhee County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at May 25, 2018, 5:18 PM MDT for Malheur County, Oregon; Owyhee County, Idaho. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 25, 2018, 5:18 PM MDT (23:18 UTC)
Expired: May 25, 2018, 6:00 PM MDT
In force: 42 min
Issued by: NWS Boise, ID
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Owyhee County, ID, Malheur County, OR

The radar

The Boise radar (KCBX), 92 km from the middle of the area, began a volume at 23:17 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

Boise Airport, ID (KBOI), launched 12:00Z, 11.3 hours before the alert went out and 99 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: 1685 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

419 
WUUS55 KBOI 252318
SVRBOI
IDC073-ORC045-260000-
/O.NEW.KBOI.SV.W.0021.180525T2318Z-180526T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boise ID
518 PM MDT FRI MAY 25 2018

The National Weather Service in Boise has issued a

* Severe Thunderstorm Warning for...
  Northwestern Owyhee County in southwestern Idaho...
  East central Malheur County in southeastern Oregon...

* Until 600 PM MDT.

* At 517 PM MDT, a severe thunderstorm was located near Antelope
  Reservoir, or 25 miles east of Rome, moving north at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will be near...
  Jordan Valley and Danner around 530 PM MDT. 
  Sheaville around 550 PM MDT. 
  Cow Lakes, Malloy Ranch and Coffeepot Crater around 600 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.

&&

LAT...LON 4287 11697 4282 11721 4316 11756 4329 11702
TIME...MOT...LOC 2317Z 160DEG 18KT 4292 11713 

HAIL...1.00IN
WIND...60MPH
 
$$

JC

1 follow-up statement

270 
WWUS55 KBOI 252344
SVSBOI

Severe Weather Statement
National Weather Service Boise ID
544 PM MDT FRI MAY 25 2018

IDC073-ORC045-260000-
/O.CON.KBOI.SV.W.0021.000000T0000Z-180526T0000Z/
Owyhee ID-Malheur OR-
544 PM MDT FRI MAY 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR NORTHWESTERN OWYHEE AND EAST CENTRAL MALHEUR COUNTIES...

At 544 PM MDT, a severe thunderstorm was located near Cow Lakes, or
26 miles northeast of Rome, moving north at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe storm will be near...
  Cow Lakes, Malloy Ranch and Coffeepot Crater around 600 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.

&&

LAT...LON 4293 11698 4295 11728 4316 11756 4329 11702
TIME...MOT...LOC 2344Z 160DEG 18KT 4305 11719 

HAIL...1.00IN
WIND...60MPH
 
$$

JC

The office that day

Everything else NWS Boise, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 9:53 AM MDT	Flash Flood Watch	BOI	Baker, Harney, Malheur	13 hr
May 25, 2:29 PM MDT	Severe Thunderstorm Warning	BOI	Harney, Malheur	61 min
May 25, 2:43 PM MDT	Severe Thunderstorm Warning	BOI	Malheur	62 min
May 25, 3:07 PM MDT	Severe Thunderstorm Warning	BOI	Malheur	53 min
May 25, 3:37 PM MDT	Severe Thunderstorm Warning	BOI	Harney	53 min
May 25, 3:53 PM MDT	Severe Thunderstorm Warning	BOI	Harney	37 min
May 25, 3:59 PM MDT	Severe Thunderstorm Warning	BOI	Malheur	61 min
May 25, 4:31 PM MDT	Severe Thunderstorm Warning	BOI	Malheur	59 min
May 25, 4:44 PM MDT	Severe Thunderstorm Warning	BOI	Harney	61 min
May 25, 5:08 PM MDT	Severe Thunderstorm Warning	BOI	Malheur	67 min
May 25, 2:10 PM MDT	Special Weather Statement	BOI		65 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2018 Severe Thunderstorm Warnings in Idaho, 2018 Every severe thunderstorm warning in 2018

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.