Alert archive / Alaska / Winter Storm Watches in 2021

Winter Storm Watch 5, NWS Fairbanks, AK

March 5, 2021

NWS Fairbanks, AK issued this winter storm watch at Mar 5, 2021, 2:38 PM AKST. It took effect at Mar 7, 2021, 6:00 AM AKST. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 5, 2021, 2:38 PM AKST (23:38 UTC)
In effect from
Mar 7, 2021, 6:00 AM AKST
Expired
Mar 6, 2021, 3:23 AM AKST
In force
Issued by
NWS Fairbanks, AK

The text

As transmitted.

266 
WWAK42 PAFG 052338
WSWWCZ

URGENT - WINTER WEATHER MESSAGE
National Weather Service Fairbanks AK
238 PM AKST Fri Mar 5 2021

AKZ207-061500-
/O.NEW.PAFG.WS.A.0005.210307T1900Z-210309T0100Z/
Chukchi Sea Coast-
Including Point Hope, Shishmaref, Kivalina, and Espenberg
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH
MONDAY AFTERNOON...

* WHAT...Blizzard conditions possible. Travel could be very
  difficult to impossible. Total snow accumulations of up to 2 
  inches, with localized amounts up to 5 inches, are possible.

* WHERE...Chukchi Sea Coast.

* WHEN...From Sunday morning through Monday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 55 mph could 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very difficult.

$$

AKZ209-061500-
/O.NEW.PAFG.WS.A.0005.210308T0000Z-210309T0300Z/
Baldwin Peninsula and Selawik Valley-
Including Kotzebue, Selawik, and Noorvik
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY AFTERNOON...

* WHAT...Blizzard conditions possible. Travel could be very 
  difficult to impossible. Total snow accumulations of 1 to 3 
  inches are possible.

* WHERE...Baldwin Peninsula and Selawik Valley.

* WHEN...From Sunday afternoon through Monday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph could 
  cause whiteout conditions in blowing snow. Significant drifting 
  of the snow is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very difficult.

$$

AKZ211-061500-
/O.NEW.PAFG.WS.A.0005.210307T2100Z-210308T1800Z/
Southern Seward Peninsula Coast-
Including Nome, White Mountain, and Golovin
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY MORNING...

* WHAT...Blizzard conditions possible. Travel could be very
  difficult to impossible. Total snow accumulations of 5 to 8 
  inches, with localized amounts up to 11 inches, are possible.

* WHERE...Southern Seward Peninsula Coast.

* WHEN...From Sunday afternoon through Monday morning.

* ADDITIONAL DETAILS...Winds gusting as high as 55 mph could 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very difficult.

$$

AKZ213-061500-
/O.NEW.PAFG.WS.A.0005.210307T1500Z-210308T1500Z/
St Lawrence Island and Bering Strait Coast-
Including Gambell, Savoonga, Brevig Mission, Teller, Wales, 
and Diomede
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE
SUNDAY NIGHT...

* WHAT...Blizzard conditions possible. Travel could be very
  difficult to impossible. Total snow accumulations of 3 to 5 
  inches, with localized amounts up to 8 inches, are possible.

* WHERE...St Lawrence Island and Bering Strait Coast.

* WHEN...From Sunday morning through late Sunday night.

* ADDITIONAL DETAILS...Winds gusting as high as 55 mph could 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very difficult.

$$

AKZ214-061500-
/O.NEW.PAFG.WS.A.0005.210308T0000Z-210308T2100Z/
Yukon Delta-
Including Mountain Village, Emmonak, Alakanuk, Kotlik, 
Pilot Station, St Marys, Scammon Bay, Marshall, Nunam Iqua, 
and Pitkas Point
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY MORNING...

* WHAT...Blizzard conditions possible. Travel could be very
  difficult to impossible. Total snow accumulations of 2 to 4 
  inches are possible.

* WHERE...Yukon Delta.

* WHEN...From Sunday afternoon through Monday morning.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph could 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very difficult.

$$

AKZ208-061500-
/O.NEW.PAFG.WS.A.0005.210307T2200Z-210309T0300Z/
Lower Kobuk and Noatak Valleys-
Including Noatak, Kiana, and Red Dog Mine
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY AFTERNOON...

* WHAT...Heavy snow and blowing snow possible. Plan on difficult
  travel conditions. Total snow accumulations of 2 to 4 inches,
  with localized amounts up to 8 inches, are possible.

* WHERE...Lower Kobuk and Noatak Valleys.

* WHEN...From Sunday afternoon through Monday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 45 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow accumulations along with blowing snow that may impact 
travel. Continue to monitor the latest forecasts.

$$

AKZ210-061500-
/O.NEW.PAFG.WS.A.0005.210307T2200Z-210309T0300Z/
Northern and Interior Seward Peninsula-
Including Buckland, Deering, Candle, Council, Haycock, 
Pilgrim Springs, Serpentine Hot Springs, and Taylor
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY AFTERNOON...

* WHAT...Heavy snow and blowing snow possible. Plan on difficult
  travel conditions. Total snow accumulations of 3 to 5 inches,
  with localized amounts up to 10 inches, are possible.

* WHERE...Northern and Interior Seward Peninsula.

* WHEN...From Sunday afternoon through Monday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 40 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow accumulations along with blowing snow that may impact 
travel. Continue to monitor the latest forecasts.

$$

AKZ212-061500-
/O.NEW.PAFG.WS.A.0005.210308T0300Z-210309T0300Z/
Eastern Norton Sound and Nulato Hills-
Including Unalakleet, Stebbins, St Michael, Elim, Koyuk, 
and Shaktoolik
238 PM AKST Fri Mar 5 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH
MONDAY AFTERNOON...

* WHAT...Heavy snow and blowing snow possible. Plan on difficult
  travel conditions. Total snow accumulations of 2 to 3 inches, 
  with localized amounts up to 7 inches, are possible.

* WHERE...Eastern Norton Sound and Nulato Hills.

* WHEN...From Sunday evening through Monday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 40 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow accumulations along with blowing snow that may impact 
travel. Continue to monitor the latest forecasts.

$$
1 follow-up statement
514 
WWAK42 PAFG 061223
WSWWCZ

URGENT - WINTER WEATHER MESSAGE
National Weather Service Fairbanks AK
323 AM AKST Sat Mar 6 2021

AKZ213-070100-
/O.UPG.PAFG.WS.A.0005.210307T1500Z-210308T1500Z/
/O.NEW.PAFG.BZ.W.0013.210307T1500Z-210308T1500Z/
St Lawrence Island and Bering Strait Coast-
Including Gambell, Savoonga, Brevig Mission, Teller, Wales, 
and Diomede
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 6 AM SUNDAY TO 6 AM AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very 
  difficult to impossible. Damage to power lines is possible. 
  Total snow accumulations of 4 to 7 inches, with localized 
  amounts up to 9 inches, are expected.

* WHERE...St Lawrence Island and Bering Strait Coast.

* WHEN...6 AM Sunday to 6 AM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 60 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ211-070100-
/O.UPG.PAFG.WS.A.0005.210307T2100Z-210308T1800Z/
/O.NEW.PAFG.BZ.W.0013.210307T1800Z-210308T2100Z/
Southern Seward Peninsula Coast-
Including Nome, White Mountain, and Golovin
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 9 AM SUNDAY TO NOON AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very 
  difficult to impossible. Damage to power lines is possible. 
  Total snow accumulations of 4 to 7 inches, with localized 
  amounts up to 10 inches, are expected.

* WHERE...Southern Seward Peninsula Coast.

* WHEN...9 AM Sunday to noon Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 60 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ210-070100-
/O.UPG.PAFG.WS.A.0005.210307T2200Z-210309T0300Z/
/O.NEW.PAFG.BZ.W.0013.210308T0300Z-210309T0100Z/
Northern and Interior Seward Peninsula-
Including Buckland, Deering, Candle, Council, Haycock, 
Pilgrim Springs, Serpentine Hot Springs, and Taylor
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 6 PM SUNDAY TO 4 PM AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very 
  difficult to impossible. Total snow accumulations of 2 to 4 
  inches, with localized amounts up to 10 inches, are expected.

* WHERE...Northern and Interior Seward Peninsula.

* WHEN...6 PM Sunday to 4 PM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 40 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ207-070100-
/O.UPG.PAFG.WS.A.0005.210307T1900Z-210309T0100Z/
/O.NEW.PAFG.BZ.W.0013.210307T1800Z-210309T0300Z/
Chukchi Sea Coast-
Including Point Hope, Shishmaref, Kivalina, and Espenberg
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 9 AM SUNDAY TO 6 PM AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very 
  difficult to impossible. Damage to power lines is possible. 
  Total snow accumulations of 3 to 5 inches, with localized 
  amounts up to 7 inches, are expected.

* WHERE...Chukchi Sea Coast.

* WHEN...9 AM Sunday to 6 PM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 60 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ209-070100-
/O.UPG.PAFG.WS.A.0005.210308T0000Z-210309T0300Z/
/O.NEW.PAFG.BZ.W.0013.210307T1800Z-210309T0300Z/
Baldwin Peninsula and Selawik Valley-
Including Kotzebue, Selawik, and Noorvik
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 9 AM SUNDAY TO 6 PM AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very
  difficult to impossible. Damage to power lines is possible. 
  Total snow accumulations of 1 to 3 inches are expected.

* WHERE...Baldwin Peninsula and Selawik Valley.

* WHEN...9 AM Sunday to 6 PM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ214-070100-
/O.UPG.PAFG.WS.A.0005.210308T0000Z-210308T2100Z/
/O.NEW.PAFG.BZ.W.0013.210307T1500Z-210308T1500Z/
Yukon Delta-
Including Mountain Village, Emmonak, Alakanuk, Kotlik, 
Pilot Station, St Marys, Scammon Bay, Marshall, Nunam Iqua, 
and Pitkas Point
323 AM AKST Sat Mar 6 2021

...BLIZZARD WARNING IN EFFECT FROM 6 AM SUNDAY TO 6 AM AKST
MONDAY...

* WHAT...Blizzard conditions expected. Travel will be very 
  difficult to impossible. Damage to power lines is possible. 
  Total snow accumulations of up to two inches, with localized 
  amounts up to 4 inches, are expected.

* WHERE...Yukon Delta.

* WHEN...6 AM Sunday to 6 AM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 55 mph will 
  cause whiteout conditions in blowing snow. Significant 
  drifting of the snow is likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions, making travel extremely difficult.

$$

AKZ208-070100-
/O.UPG.PAFG.WS.A.0005.210307T2200Z-210309T0300Z/
/O.NEW.PAFG.WS.W.0005.210307T1800Z-210309T0300Z/
Lower Kobuk and Noatak Valleys-
Including Noatak, Kiana, and Red Dog Mine
323 AM AKST Sat Mar 6 2021

...WINTER STORM WARNING IN EFFECT FROM 9 AM SUNDAY TO 6 PM AKST
MONDAY...

* WHAT...Heavy snow and blowing snow expected. Plan on difficult
  travel conditions. Damage to power lines is possible. Total 
  snow accumulations of 2 to 4 inches, with localized amounts up 
  to 9 inches, are expected.

* WHERE...Lower Kobuk and Noatak Valleys.

* WHEN...9 AM Sunday to 6 PM Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph will 
  cause widespread blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe
winter weather conditions are expected. This will make travel
very difficult or impossible.

$$

AKZ212-070100-
/O.UPG.PAFG.WS.A.0005.210308T0300Z-210309T0300Z/
/O.NEW.PAFG.WS.W.0005.210307T2100Z-210308T2100Z/
Eastern Norton Sound and Nulato Hills-
Including Unalakleet, Stebbins, St Michael, Elim, Koyuk, 
and Shaktoolik
323 AM AKST Sat Mar 6 2021

...WINTER STORM WARNING IN EFFECT FROM NOON SUNDAY TO NOON AKST
MONDAY...

* WHAT...Heavy snow and blowing snow expected. Plan on difficult
  travel conditions. Damage to power lines is possible. Total 
  snow accumulations of 1 to 3 inches, with localized amounts up 
  to 5 inches, are expected.

* WHERE...Eastern Norton Sound and Nulato Hills.

* WHEN...Noon Sunday to noon Monday.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe
winter weather conditions are expected. This will make travel
very difficult or impossible.

$$

AKZ217-070100-
/O.NEW.PAFG.WS.A.0006.210308T0900Z-210309T0900Z/
Upper Kobuk and Noatak Valleys-
Including Ambler, Shungnak, and Kobuk
323 AM AKST Sat Mar 6 2021

...WINTER STORM WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
MONDAY EVENING...

* WHAT...Heavy snow and blowing snow possible. Plan on difficult
  travel conditions. Damage to power lines is possible. Total 
  snow accumulations of 1 to 3 inches, with localized amounts up 
  to 8 inches, are possible.

* WHERE...Upper Kobuk and Noatak Valleys.

* WHEN...From late Sunday night through Monday evening.

* ADDITIONAL DETAILS...Winds gusting as high as 50 mph will 
  cause widespread blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

$$

What forecasters said that day

The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fairbanks, AK wrote its last area forecast discussion before this winter storm watch went out at Mar 5, 2:35 PM AKST, 3 minutes earlier.

Area forecast discussion, Mar 5, 2:35 PM AKST, 3 minutes before
Northern Alaska Forecast Discussion
National Weather Service Fairbanks AK
235 PM AKST Fri Mar 5 2021

.SYNOPSIS...

A stalled front over the Central Interior will keep light snow
over that area through this evening before falling apart as it
tries to move east. Some flurries and light snow showers will
shift east, but coverage will be limited given the south flow
aloft.

Attention really turns to a low pressure system moving into the
Norton Sound and Yukon Delta area tomorrow, bringing snow and
blowing snow for a brief period as it moves through. A major storm
is expected to move into the West Coast on Sunday and Sunday into
early Monday, bringing potential blizzard conditions and heavy
snow. This front shifts inland through midweek, bringing snow to
much of the Interior as well.

&&

.DISCUSSION...

Upper Levels and Analysis...
There is a very deep 475 dam upper level trough over Eastern
Siberia and this feature is effectively the anchor for the weather
pattern. The front which brought blizzard conditions to the West
Coast yesterday has weakened and moved into the Central Interior
bringing some light snow. There is another low forming in the
Gulf of Alaska which will act to "shut off" much of the light
snow over the Central Interior as energy transitions south.

West Coast and Western Interior...
Gusty southeast winds are still occuring over the Capes and along
the Chukchi Sea Coast, which is resulting in areas of blowing and
drifting snow. Some snow showers are also continuing along Norton
Sound coastlines in southerly flow, which will continue through
tomorrow morning.

Attention turns to fast moving low which will move through Norton
Sound and the Yukon Delta tomorrow, bringing snow and blowing snow
to the Yukon Delta and into parts of Norton Sound. Some minor
blowing and drifting snow hazards are possible with east to
southeast winds of 15-30 mph. Snow will generally be less than a
few inches.

The next attention grabber is a major storm which is still on
track for the West Coast Sunday and early Monday, which will bring
heavy snow and near blizzard to full on blizzard conditions to
many areas. This storm will have warmer temps than the last, but
heavier snowfall for some locations including Nome. Blizzard
watches and winter storm watches will be issued with this
forecast. Stay tuned...

Central and Eastern Interior...
High and dry for most of the Interior with light snow over the
Central Interior ending this evening. A chance for light snow will
move into the Central Interior from the AK Range north to the
White Mountains tomorrow, with minimal if any snow accumulations.

Attention turns to Chinook warming and increasing AK Range winds
on Monday as a strong front approaches from the west. Temps will
shoot up to near freezing for some areas of the Interior,
especially those close to the AK Range. Also, strong south winds
will build as +10 mb pressure gradient forms by Monday for
Windy/Isabel Passes.

North Slope and Brooks Range...
Mostly dry and periodic clouds but otherwise quiet weather on the
Slope. Temps have rebounded nicely over the Western Arctic Coast
with warm air advection aloft.

Winds really ramp up along the entire north slope from the
southeast beginning Sunday morning and moving eastward Sunday
night. Expect areas of blowing and drifting snow as long as
significant gap winds from the south through the AK Range.

Coastal Hazard Potential Days 3 and 4...None.

&&

.AFG WATCHES/WARNINGS/ADVISORIES...

Winter Storm Watch for AKZ207-AKZ208-AKZ209-AKZ210-AKZ211-AKZ212-
AKZ213-AKZ214.

Brisk Wind Advisory for PKZ210-PKZ215-PKZ220-PKZ225.

&&

AHSENMACHER MAR 21

The office that day

Everything else NWS Fairbanks, AK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 4, 3:04 PM AKSTWind AdvisoryAFG6 hr
Mar 4, 8:34 PM AKSTHigh Wind WarningAFG6 hr
Mar 5, 3:57 AM AKSTBrisk Wind AdvisoryAFG36 hr
Mar 5, 4:05 AM AKSTBrisk Wind AdvisoryAFG23 hr

Nearby

Winter Storm Watches in Alaska, 2021Every winter storm 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.