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Plains States Observations and Discussion Thread


lookingnorth
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  • 3 months later...

An intense arctic airmass is in place across ND and eastern MT. This would be very impressive in mid-winter, but even more so on Feb 17-19.  Coldest since early Feb 1996?

Here's the NWS forecast for Crosby, ND in the far NW corner of the state. Temps were in the minus 20s at midnight, so the daily max may end up around -20.  That is incredibly rare.

 

Washington's Birthday
Sunny and cold, with a steady temperature around -20. Wind chill values as low as -40. North wind 3 to 8 mph.
Tonight
Partly cloudy, with a low around -45. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny and cold, with a high near -14. Wind chill values as low as -45. Calm wind becoming north around 5 mph.
Tuesday Night
Mostly clear, with a low around -43. Wind chill values as low as -60. Light and variable wind becoming northwest around 5 mph in the evening.
Wednesday
Sunny and cold, with a high near -5. Southwest wind 5 to 7 mph becoming southeast in the afternoon.
Wednesday Night
Clear, with a low around -26. South wind 6 to 10 mph.
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It dropped to -45F in Hettinger ND, under perfect radiational cooling conditions.  This is incredible, considering that it's relatively late in the season.  Probably around 50 degrees below normal (?).

 

Weather observations for the past three days for
Hettinger, Hettinger Municipal Airport
Imperial (Metric)
Date Time (mst) Wind (mph) Vis. (mi.) Weather Sky Cond. Temperature (ºF) Relative Humidity Wind Chill (°F) Heat Index (°F) Pressure Precipitation (in)
Air Dwpt 6 hour altimeter (in) sea level (mb) 1 hr 3 hr 6 hr
Max. Min.
19 07:53 Calm 10.00 Fair CLR -38.2 0     0%     30.63 1049.3      
19 06:53 Calm 10.00 Fair CLR -41.8 0     0%     30.63 1049.2      
19 05:53 Calm 10.00 Fair CLR -43.6 0     0%     30.63 1049.3      
19 04:53 Calm 10.00 Fair CLR -41.8 0 -36 -45 0%     30.65 1049.5      
19 03:53 Calm 10.00 Fair CLR -43.6 0     0%     30.66 1049.8      
19 02:53 Calm 10.00 Fair CLR -38.2 0     0%     30.67 1049.5      
19 01:53 Calm 10.00 Fair CLR -41.8 0     0%     30.68 1050.3      
19 00:53 Calm 10.00 Fair CLR -38.2 0     0%     30.68 1050.2      
18 23:53 Calm 10.00 Fair CLR -40 0     0%     30.68 1050.4    
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