Meteorologist Aaron Shaffer

@ashafferwx.bsky.social

1824 Followers 473 Following

Retired TV meteorologist, UW-Madison graduate in Atmospheric & Oceanic Sciences. Bike commuting, mountain biking, windsurfing, skiing, backpacking, canoeing. Protect the Boundary Waters Canoe Area. Minneapolis Bicycle Advisory Committee Ward 8.

Radar showing storms over southern North Dakota and beyond
Showing the forecasted near surface smoke density at 6:00 a.m. Friday , which shows a departing scary looking purple shaded batch of smoke
Two men looking at a fire just after Sunset along the lake
Map of air quality showing numbers off the chart and extremely hazardous
Graph showing a lot of numbers on a chart, but temperatures maxing out in the middle 90s on Wednesday on one and winds from the NW at 5-6mph Wednesday afternoon on another, which would/could bring in smoke from northern Minnesota.
Temperature map from Monday at 850mb, showing a wedge of hot air over lower canada and northern MN, and cooler temps closer to the north pole.
Residents warned to be ready to evacuate if needed The St. Louis County Sheriff's Office has implemented its Ready. Set. Go. Notification system in the northern part of the county to notify residents and property owners to keep up with the current wildfire situation and disseminate alerts for the need to evacuate if the situation rises to that level. As of 10 a.m. Monday, properties near the Marion Creek, Echo 2, Sioux, Beaver Tail and Coffin fires were at an orange level, meaning "prepare to leave at short notice," the message read.
A lot of text explaining that due to extreme fire conditions The Boundary Waters canoe area permits for this week are canceled either today through Friday if you are paddling or tomorrow through Friday with the motor permit
A package of chicken priced at $6.66
Strong thunderstorms showing up on radar in South Dakota
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO MINNESOTA.... CORRECTED FOR THUNDER LINES ...SUMMARY... Widely scattered to scattered severe storms capable of large hail and severe wind gusts are possible from the northern High Plains into parts of the Upper Midwest today into tonight. Isolated severe storms capable of mainly damaging wind gusts are possible this afternoon and evening from the southern Mid-Atlantic into the Carolinas, the Sabine River Valley, parts of the Great Basin, and southeast Arizona.
Line of storms over Stearns and Kandiyohi counties moving east on radar.
Line of strong thunderstorms on radar
Storms in the nw suburbs of Minneapolis on radar.
A vivid radar image with storms North Northwest and west of Minneapolis
Radar showing small isolated storms across MN.
Storms sw of Minneapolis moving ne
Radar image showing a line of storms aligned north to south and Western Minnesota
..THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM NORTHEAST SOUTH DAKOTA INTO NORTHWEST MINNESOTA... ...SUMMARY... Severe thunderstorms capable of an intense swath of severe wind gusts are likely across northeast South Dakota into northwest Minnesota through midday. Later today, severe thunderstorms are possible from parts of the northern Plains into the Upper Midwest. Large hail and severe winds are the primary concerns, though a couple of tornadoes may also occur. ...Dakotas/Mid-Missouri Valley/Upper Midwest... Water-vapor imagery this morning shows a mid-level shortwave trough over the central Rockies. This upper disturbance will acquire a negative tilt and move into the central Dakotas by early evening. A surface low over the north-central Plains will develop northward into eastern ND by 00z as a warm front advances northward across much of MN. Through midday, an intense supercell over northeast SD will continue to move quickly northeastward through parts of the eastern Dakotas this morning and into northwest MN. Recent CAM model guidance (i.e., time-lagged HRRR) has been remarkably consistent in showing the evolution of the SD thunderstorm complex into northern MN today. Have upgraded to an Enhanced Risk downstream of this extremely intense supercell evolving into a bow within a focused mesoscale corridor. Please refer to MCD #1376 for short-term forecast details.
Here's a future radar view showing a north-south oriented line of storms late evening/overnight. #MNWX
A canoe pedals next to a large Hill on a glass of lake with partly cloudy sky
Line of storms approaching Minneapolis
Strong storm over NW subrubs of Minneapolis on radar.
Storm approaching Brooklyn park on radar and one just north of Elk River.
Map showing severe thunderstorm watch over central MN
Radar image showing storms approaching Minneapoluis
Radar velocity data showing a 41 mile per hour Radar velocity data showing a 41 mile per hour
Radar view showing 2 fingers of rain approaching minneapolis.
Radar image showing a gap and ran centered right over the Twin Cities metro area
Riverview showing light rain approaching the Twin Cities and heavier rain in Southern Minnesota
...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS OVER EASTERN MINNESOTA...MUCH OF WISCONSIN...CENTRAL AND EASTERN IOWA...AND NORTHWEST ILLINOIS... ...SUMMARY... Scattered to numerous severe thunderstorms capable of large hail in excess of two inches in diameter, a few strong tornadoes, and damaging winds with gusts in excess of 75 mph appear likely across portions of the upper Mississippi Valley and Midwest Wednesday afternoon into night. More sporadic occurrences of large hail and damaging winds are possible into the central and southern Plains, and from the lower Great Lakes toward the Mid-Atlantic coast. ...Synopsis... An upper low along the MT-SK border Wednesday morning is forecast to deepen while redeveloping to along the ND-MB border Wednesday night. That intensification process will be driven by mid/upper-level jet streaks moving through the base of broader-scale trough, in tandem with an amplifying short-wave trough. A lead disturbance initially over the northern High Plains Wednesday morning will accelerate northeast into the Upper MS Valley by evening, along with the leading edge of stronger mid/upper-level jet streak winds.
Rain skirting near south Minneapolis on radar.
Brooklyn line of storms unreal new orleaner Stretching Salties the Usedom Brooklyn line of storms unreal new orleaner Stretching Salties the Usedom
Radar view of Central and Southern Minnesota showing storms just north of the Twin Cities and in West Central Minnesota both areas of storms are circled in a purple circle indicating of mesoscale discussion
Radar showing a big thunderstorm headed to Minneapolis
Line of storms on radar heading to the Twin Cities
A radar image showing a slow moving line of rain Southwest of Minneapolis but also a smaller batch of rain that's much closer to the Twin Cities
Radar view showing rain Southwest of Minneapolis moving northeast, but slowly drying as it makes its trek
Future radar view showing rain arriving around 10:00 p.m.
Radar view showing rain moving north toward Minneapolis
Future radar view showing storms nearing Minneapolis around 6 p.m. tonight.
Map showing two possible ways to cross the train tracks from the Cedar Lake Trail to get to Costco by bike.