Update history for SPC HREF Ensemble Viewer

2019-04-03

  1. Add two new ensemble members: HRRR and HRRR -6h.
  2. Extend HREF forecasts to 48-h lead time (some members drop out late in forecast; see "HREF members" link on right menu for details).
  3. New product: member viewer for composite reflectivity with 4-h max and min 2-5 km UH tracks. Minimum UH is unavailable on NAM Nest and HRW NMMB members as of March 2019, but may be added soon.
  4. New products: freezing rain QPF and FRAM-based accretion estimate.
  5. New product: ensemble mean cloud cover for low-, mid-, and high-level clouds.
  6. Several additional thresholds added for (2-m RH, 10-m hourly max wind) combined probabilities.
  7. Ensemble max 2-5 km UH contours available as overlay on some environmental fields (e.g., CAPE).
  8. Introduce new UI to toggle between SPC outlook overlay products and issuance times. All D1 and D2 convective and fire outlooks now available.
  9. NWS TOR/SVR warnings available as verification for 4-h and 24-h products.
  10. Replace rollover buttons for forecast times with slider bar.
  11. "Other Overlays" (GIS, SPC Outlooks, Verification) toggled on by user remain active after new page load.
  12. Some fields reorganized into member-viewer style UI: multiple exceedance probability thresholds combined into "threshold probs" suites (QPF, snowfall, SBCAPE, etc.), plus ensemble min/mean/max suites added for SBCAPE, 2-m RH, and 10-m hourly max wind.

2018-04-04

  1. New products: rolling 4-h windows for many time-maximum field products (updraft helicity, updraft, 10-m AGL wind speed, and reflectivity). The rolling 4-h windows replace the sequence of 3-h windows previously plotted.
  2. New products: Fixed-Layer STP mean, P[>1], and P[>3]. Fixed Layer STP formulation is from Gallo et al. (2018).
  3. New products: QPF gridpoint probability for 1-h P[>1"]; 6-h P[>1"]; 6-h P[>2"]; and 6-h P[>3"].
  4. New product: updraft helicity member viewer. Some fields on this product are currently unavailable for NAM Nest and HRW NMMB members, but will be included in the future.
  5. Add 700-500 mb lapse rate (contours, transparent fill) as optional overlay for 700 mb product.
  6. Add surface based CAPE (contours) as optional overlay for 0-1 km and 0-3 km SRH products.
  7. Add surface based CIN (contours, hatching) as optional overlay for SBCAPE products.
  8. Add ensemble mean 2-m AGL temperature (contours at 50°F and 60°F) as optional overlays for Fosberg products.
  9. Change color table for 1-h mean snowfall product.
  10. Add hotkeys: J and L for changing forecast times, K and I for changing members in member viewer (existing hotkeys are unchanged).

2017-11-01

  1. Initial site launch coinciding with HREFv2 operational implementation.