A powerful winter storm system began to move across the area today, spreading strong winds and blizzard condtions to portions of the area. The following is a list of the strongest wind reports that have occured so far across the area. Snow and blowing snow combined with the strong winds to create areas of white out conditions across the northwest corner of the Goodland County Warning Area.
|Location||Wind Gust Speed(mph)|
|Yuma||60 543 AM MDT|
|Goodland Airport||64 917 AM MDT|
|Kirk||67 803 AM MDT|
|Decatur||56 816 AM MDT|
|12 NNE Goodland||60 911 AM MDT|
|3 W Bird City||62 836 AM MDT|
|2 NW Haigler||58 837 AM MDT|
|Grinnel||57 841 AM MDT|
|McCook||56 844 AM MDT|
|Burlington Airport||71 949 AM MDT|
|5 W Goodland||65 1112 AM MDT|
|St. Francis||55 904 AM MDT|
|3 NE Kirk||68 904 AM MDT|
|12 W Goodland||78 905 AM MDT|
|Oakley||57 907 AM MDT|
|2 W Yuma||61 936 AM MDT|
|Stratton Colorado||55 936 AM MDT|
|Weskan||59 952 AM MDT|
|Atwood||59 955 AM MDT|
|3 SSE Oakley||63 955 AM MDT|
|Brewster||54 958 AM MDT|
|Seibert||59 1006 AM MDT|
|Colby||58 1033 AM MDT|
|2 S Tribune||61 1039 AM MDT|
|2 WNW Tribune||61 1039 AM MDT|
|Sharon Springs||60 1057 AM MDT|
|Flagler||63 1231 PM MDT|
Measurable snowfall also occured across much of the area, and at the Goodland airport the snow was the 9th latest measurable snowfall on record. The following lists the top ten latest snowfalls at the Goodland airport.
This storm system also produced widespread severe weather across the Central Plains with several tornadoes reported. The following images are of all the Local Storm Reports received at SPC.
May 1st Local Storm Reports
May 2nd Local Storm Reports
A strong upper level low pressure system moved over the area during the morning Overnight May 1st and into the morning of May 2nd. By 6 AM MDT (7 AM CDT) a strong upper level low had moved onto the plains with widespread thunderstorms developing ahead of an advancing cold front. An intensifying surface low across southwest Iowa resulted in a tight pressure gradient setting up over the Tri State Area. The image on the left displays water vapor imagery, 1 hour lightning plots and 500 mb geopotential heights. The image on the right displays sea level pressure (yellow isobars) across the area. Although the surface low and cold front are well to the east of the area, the closely spaced isobars indicated a strong pressure gradient across the area.
6 AM MDT Water Vapor/500 mb heights
6 AM MDT Surface Sea Level Pressure
Precipitation quickly began to spread across the area during the morning hours, and while a few locations reported rain, precipitation quickly changed over to snow. Snow spread across the area from the northwest as the intense upper level circulation began to advect moisture around to the western half of the system.
6 AM MDT Composite Reflectivity
9 AM MDT Composite Reflectivity
By Noon MDT strong winds had spread across the entire area as the low pressure system across Iowa continued to intensify and a high pressure system moved eastward into Wyoming. The strong upper level circulation had shifted slightly to the east, with widespread thunderstorms continuing in advance of the system.
Noon MDT Water Vapor Imagery/Lightning
Noon Sea Level Pressure
Precipitation had become more widespread across the area at this time, with reports of snow coming from much of the area. The strong circulation with the storm allowed ample moisture to be "wrapped around" the system. The image on right displays winds and mixing ratio (a measure of moisture content) on the 300 K isentropic surface. Cold values indicate more moisture, with warm colors indicating drier air. This level is at different heights across the map and air generally will flow along the surface. For intance this level is very close to sea level across the Gulf Coast, but around 12000 ft above sea level across northern Nebraska. Very moist air was being drawn northward ahead of the system, and then being advected back to the west.
Noon Composite Reflectivity
Noon 300K Mixing Ratio/Wind