Montana, 2018

Drought in Montana, April 1 to 30, 2018

April 1 to 30, 2018 · NWS GGW · 2 events in 2 counties and zones

The month of April began with Severe (D2) drought conditions still being experienced by Sheridan and eastern Daniels counties. By the end of the month, enough precipitation had fallen over the area to relieve this somewhat, with no areas remaining in the Severe drought category by the end of April.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GGW wrote it up.

The month of April began with Severe (D2) drought conditions still being experienced by Sheridan and eastern Daniels counties. By the end of the month, enough precipitation had fallen over the area to relieve this somewhat, with no areas remaining in the Severe drought category by the end of April. Sheridan, Daniels, and Roosevelt counties were still experiencing Moderate (D1) drought conditions, however.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before the first event at Mar 31, 6:08 PM MST, 5 hours 52 minutes earlier.

Area forecast discussion, Mar 31, 6:08 PM MST, 5 hours 52 minutes before
Area Forecast Discussion
National Weather Service Glasgow MT
708 PM MDT Sat Mar 31 2018

.DISCUSSION...

Evening Update (7pm MDT): Only tweaks to the forecast for the
coming 24 hour period are to MaxT/MinT and winds to account for
the building high pressure over the region. Left the next storm
system alone for now as the narrative and model solutions are
doing a good job of resolving it, and thus is currently reflected
well enough in the grids to not require edits for the evening
package. Bigelbach

PREVIOUS DISCUSSION: The cold front that pushed through Northeast
Montana remains well to the southwest. With northwest flow,
surface and aloft, most temperatures today only got into the teens
and 20s, around 25-30 degrees below normal. With an upper ridge
off to the west, the northwest flow aloft will continue tonight.
An Arctic surface high will maintain mostly clear skies tonight
for another round of single digit lows, some below zero. The
surface high will cause winds to become light and variable, so
dangerous wind chills are not expected.

Sunday, a developing storm system near Vancouver Island will send
additional moisture into Montana. By evening, snow is expected
that will spread over Northeast Montana through Monday evening.
The storm will cover all of central and parts of eastern Montana.
Snow total amount range from zero to 8 inches for our area. Mainly
used FB for this storm, which produced headline snow. As a result,
in coordination with surrounding offices, issued a winter storm
watch.

Tuesday and Wednesday, the upper ridge in the west reestablishes
itself, although the stationary front keeps our region on the cold
side.

Thursday, another Arctic low descending into Manitoba and more
Pacific moisture will conspire to generate another winter storm
for Thursday and Friday. Models diverge quite a bit at this point.
Most have this system loses strength as it runs into the Rockies,
leaving northeast Montana with periods of precipitation. A lot
can change by then, so will see how this progresses over the next
few days.

Templer

&&

.AVIATION...

Expected Flight Category: VFR

Synopsis: A small and short-lived high pressure system builds over
the region tonight. This will lead to VFR conditions across the
region. Slight chances for some visibility reduction due to
freezing fog exist mainly at GGW tomorrow morning, but not likely.
Another approaching winter-like storm system moves its way in
tomorrow evening and could hinder operations through Monday.

Wind: Northwest winds at 10-15 kts will become light and variable
overnight and through much of the morning. After around midday,
winds will shift to the southeast at 7-12 kts across the sites.

Bigelbach

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Sunday evening through Monday evening
for Central and Southeast Phillips...Central and Southern
Valley...Dawson...Eastern Roosevelt...Garfield...McCone...
Northern Phillips...Northern Valley...Petroleum...Prairie...
Richland...Southwest Phillips...Western Roosevelt...Wibaux.

&&

weather.gov/glasgow

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 drought. Local standard time, as filed.

Drought, Daniels

When
April 1, 12:00 AM MST to April 30, 11:59 PM MST
Where
Daniels forecast zone
Reported by
Drought Monitor
Coordinates
48.784, -105.549 (the zone’s center; the record gives no point)

Severe (D2) drought conditions were experienced across eastern Daniels County throughout the month of April. The drought was relieved by one to three inches of liquid water equivalent in the area, which was more than twice the normal amount of precipitation for April. Conditions were shown to have improved by the Drought Monitor on May 1st.

Drought, Sheridan

When
April 1, 12:00 AM MST to April 30, 11:59 PM MST
Where
Sheridan forecast zone
Reported by
Drought Monitor
Coordinates
48.721, -104.505 (the zone’s center; the record gives no point)

Severe (D2) drought conditions were experienced across much of Sheridan County throughout the month of April. The drought was relieved by half an inch to one and a half inches of liquid water equivalent in the area, which was up to 150 percent of the normal amount of precipitation for April. Conditions were shown to have improved by the Drought Monitor to Moderate (D1) drought conditions April 17th for the eastern two thirds of the county, and on May 1st for the western third of the county.

What these are

Drought
A drought reaching severe (D2) or worse on the US Drought Monitor, or with notable impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 2018Every state in 2018This day in weather historyWarnings in Montana, April 2018

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 747397, 747402.