Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Glasgow, MT

May 23, 2018Richland County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at May 23, 2018, 8:02 PM MDT for Richland County, Montana. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 23, 2018, 8:02 PM MDT (02:02 UTC)
Expired: May 23, 2018, 8:45 PM MDT
In force: 43 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Richland County, MT

The radar

The Glasgow radar (KGGW), 186 km from the middle of the area, began a volume at 02:03 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.

What was reported inside it

Time	Report	Where	Remark
May 23, 8:03 PM MDT	HAIL 1	33 Ne Bloomfield, MT	TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 2.0 hours before the alert went out and 184 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: 209 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

908 
WUUS55 KGGW 240202
SVRGGW
MTC083-240245-
/O.NEW.KGGW.SV.W.0021.180524T0202Z-180524T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Glasgow MT
802 PM MDT WED MAY 23 2018

The National Weather Service in Glasgow has issued a

* Severe Thunderstorm Warning for...
  East central Richland County in northeastern Montana...

* Until 845 PM MDT

* At 801 PM MDT, a severe thunderstorm was located 9 miles west of
  Sidney, moving northeast 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. 

* Locations impacted include...
  Sidney, Fairview, Wooley and Crane. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4756 10428 4765 10451 4794 10429 4784 10404
      4774 10404
TIME...MOT...LOC 0201Z 209DEG 19KT 4768 10435 

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

Mottice

2 follow-up statements

318 
WWUS55 KGGW 240218
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
818 PM MDT WED MAY 23 2018

MTC083-240245-
/O.CON.KGGW.SV.W.0021.000000T0000Z-180524T0245Z/
Richland MT-
818 PM MDT WED MAY 23 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM MDT
FOR EAST CENTRAL RICHLAND COUNTY...

At 818 PM MDT, a severe thunderstorm was located near Sidney, moving
northeast 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. 

Locations impacted include...
Sidney, Fairview and Wooley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4768 10420 4775 10444 4794 10429 4784 10404
      4779 10404
TIME...MOT...LOC 0218Z 209DEG 19KT 4775 10429 

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

Mottice

214 
WWUS55 KGGW 240237
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
837 PM MDT WED MAY 23 2018

MTC083-240247-
/O.EXP.KGGW.SV.W.0021.000000T0000Z-180524T0245Z/
Richland MT-
837 PM MDT WED MAY 23 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL RICHLAND COUNTY
WILL EXPIRE AT 845 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

LAT...LON 4768 10420 4775 10444 4794 10429 4784 10404
      4779 10404
TIME...MOT...LOC 0237Z 209DEG 19KT 4783 10422 

$$

Mottice

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	37 min
May 23, 6:42 PM MDT	Severe Thunderstorm Warning	GGW	McCone	33 min
May 23, 6:44 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	61 min
May 23, 6:55 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	50 min
May 23, 7:00 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	37 min
May 23, 7:18 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	57 min
May 23, 8:17 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	29 min

Nearby

Severe Thunderstorm Warnings in Montana, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.