Alert archive / Alaska / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 21, NWS Fairbanks, AK

July 24, 2023

NWS Fairbanks, AK issued this severe thunderstorm warning at Jul 24, 2023, 4:21 PM AKDT. It was in force for 24 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: Jul 24, 2023, 4:21 PM AKDT (00:21 UTC)
Expired: Jul 24, 2023, 4:45 PM AKDT
In force: 24 min
Issued by: NWS Fairbanks, AK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

The radar

The Fairbanks Faa radar (PAPD), 37 km from the middle of the area, began a volume at 00:24 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

Fairbanks, (PFAI), launched 00:00Z, 0.4 hours before the alert went out and 50 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: 373 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 2192 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

695 
WUAK59 PAFG 250021
SVRAFG
AKZ222-250045-
/O.NEW.PAFG.SV.W.0021.230725T0021Z-230725T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fairbanks AK
421 PM AKDT Mon Jul 24 2023

The National Weather Service in Fairbanks has issued a

* Severe Thunderstorm Warning for...
  Northwestern Middle Tanana Valley in Alaska...

* Until 445 PM AKDT.

* At 421 PM AKDT, a severe thunderstorm was located 17 miles north of
  Moose Mountain Ski Area, moving south at 15 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Wickersham Dome.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 6535 14823 6531 14785 6509 14789 6514 14831
TIME...MOT...LOC 0021Z 351DEG 12KT 6520 14802 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

BB

2 follow-up statements

774 
WWAK59 PAFG 250029
SVSAFG

Severe Weather Statement
National Weather Service Fairbanks AK
429 PM AKDT Mon Jul 24 2023

AKZ222-250045-
/O.CON.PAFG.SV.W.0021.000000T0000Z-230725T0045Z/
Middle Tanana Valley-
429 PM AKDT Mon Jul 24 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM AKDT
FOR NORTHWESTERN MIDDLE TANANA VALLEY...

At 429 PM AKDT, a severe thunderstorm was located 15 miles north of
Moose Mountain Ski Area, moving south at 15 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Wickersham Dome.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 6530 14814 6530 14794 6515 14794 6519 14821
TIME...MOT...LOC 0029Z 351DEG 12KT 6517 14801 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

BB

365 
WWAK59 PAFG 250037
SVSAFG

Severe Weather Statement
National Weather Service Fairbanks AK
437 PM AKDT Mon Jul 24 2023

AKZ222-250047-
/O.EXP.PAFG.SV.W.0021.000000T0000Z-230725T0045Z/
Middle Tanana Valley-
437 PM AKDT Mon Jul 24 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MIDDLE TANANA
VALLEY WILL EXPIRE AT 445 PM AKDT...
                
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.

LAT...LON 6530 14814 6530 14794 6515 14794 6519 14821
TIME...MOT...LOC 0037Z 351DEG 12KT 6517 14801 

$$

BB

The office that day

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

Issued	Product	Office	Lasted
Jul 24, 4:24 PM AKDT	Severe Thunderstorm Warning	AFG	21 min
Jul 24, 4:45 PM AKDT	Severe Thunderstorm Warning	AFG	10 min
Jul 24, 6:56 PM AKDT	Severe Thunderstorm Warning	AFG	34 min

Nearby

Severe Thunderstorm Warnings in Alaska, 2023 Every severe thunderstorm warning in 2023

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.