Yesterday was a warm, but beautiful day in Boulder. There was hardly a cloud in the sky for most of the day. It was a good day for the observatory.
This morning has been mostly sunny, mild and still.
The NWS in Boulder, CO, forecasts a sunny day, with a high temperature of 96 F. The winds will be calm, becoming north northeast at 6 mph in the afternoon. This evening will be partly cloudy, with a low temperature of 63 F. The winds will be from the north at 5-7 mph, becoming west by midnight.
The NWS in Boulder, CO, has issued a Hazardous Weather Outlook concerning the heat for the next few days. Temperatures will reach the upper 90’s, and combined with the low humidity, will amplify the fire threat.
The visible satellite image shows no clouds over the state today. This image has been excluded from today’s post.
The 12 Z upper air sounding from Boulder shows hot air aloft, and a gigantic capping inversion. There was 0.41 inches of precipitable water present in the column. There was no Convective Available Potential Energy (CAPE) and no Convective Inhibition (CINH). The Lifted Condensation Level (LCL) was 390 m. There was a gigantic thermal inversion near the surface, and the 0-3 km average lapse rate was 2.0 C/km.
The hodograph shows that there was 13 kts low-level shear (due mostly to directional changes) and 24 kts deep-layer shear (due mostly to speed changes).
The surface observations (from the SPC Mesoscale Analysis Map) show mild temperatures and low humidity, based on the dewpoints. The skies are clear, and the winds are light and variable, statewide.
The surface pressure chart shows no strong pressure systems or gradients over the state this morning. The RAP shows that the pressure will drop everywhere in the region, due to diurnal heating. No strong pressure gradients are expected to develop over the next six hours.
The NAM 250 mb chart shows northwesterly flow behind the upper-level low pressure system that has moved northeast of the state. The polar jet passes north of the state, and we will likely switch to zonal flow in the next few days.
The HRRR simulated reflectivity shows no precipitation is expected at all today. This image has been excluded from today’s post.
The HRRR predicts that the high temperatures for Boulder will peak in the upper 90’s by 22 Z.
The HRRR shows that the winds will not be too strong. This image has been excluded from today’s post.
The HRRR shows today will remain nearly cloudless. There will be a few clouds by the late afternoon and early evening hours.
Today is going to be hot, unfortunately. I’m not thrilled by this. However, the skies will be mostly clear, and perhaps the participants of the SSP will be able to use the observatory tonight for data collection.
Thank you for reading my post.
The forecasts from the National Weather Service are from The NWS Homepage
The upper air soundings and mesoscale analysis plots are from the Storm Prediction Center website.
The satellite data, model data, and forecasted soundings are from College of DuPage – SATRAD