Rare Severe Thunderstorm Warning

On Monday, June 23, 2014, the Fairbanks National Weather Service Office issued a Severe Thunderstorm Warning for the southern Yukon Flats (AKZ 220).

WUAK59 PAFG 240411
SVRAFG
AKZ220-240430-
/O.NEW.PAFG.SV.W.0001.140624T0411Z-140624T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FAIRBANKS AK
807 PM AKDT MON JUN 23 2014

THE NATIONAL WEATHER SERVICE IN FAIRBANKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL YUKON FLATS AND SURROUNDING UPLANDS IN ALASKA 50 
  MILES NORTHWEST OF TWELVEMILE SUMMIT...

* UNTIL 830 PM AKDT

* AT 807 PM AKDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 50
  MILES NORTHWEST OF TWELVEMILE SUMMIT...AND MOVING NORTH AT 5 MPH.

The last time a Severe Thunderstorm Warning was issued anywhere in Alaska was on July 11, 2010 (AKZ 222 near Twelvemile Summit). There are people far more qualified than I am to discuss the atmospherics of this event; however, I did want to show a few maps of the region and some of the radar products. On each map, the trapezoid represents the coordinates of the warned area. Some of the interesting features include the 3.27"/hour maximum precipitation rate and the 90% probability of hail statistic (a text product).

Figure 1. Location map of Severe Thunderstorm Warning.

Figure 2. Base Reflectivity map of Severe Thunderstorm Warning.

Figure 3. Cloud to height map of Severe Thunderstorm Warning.

 

Figure 4. Storm Relative Velocity map of Severe Thunderstorm Warning.

 Figure 5. Instantaneous Precipitation Rate map of Severe Thunderstorm Warning.

Figure 6. Vertical Integrated Liquid map of Severe Thunderstorm Warning.