SUBVORTEX STATUS MESSAGE DATE: 5/31/98 STATUS: NO-GO EQUIPMENT STATUS: Mobile Mesonets: FC needs new RH sensor DOWS: Unknown UMASS Radar: down indefinitely Rockets: not operational Turtles: operational RALPH and BOB: operational NOAA P-3: unknown SYNOPSIS: Upper ridge has strengthened to climatologically extreme strength, with 500 mB temperatures near -1 over TX. The surface cold front will lead to convergence across OK, S KS, and N TX today, but hot temperatures aloft will preclude thunderstorm development. DAY 1 FORECAST: No convection. DAY 2 FORECAST: Moisture will be absent after the passage of the Day 1 cold front; temperatures aloft will remain scorching. No convection. DAY n FORECAST: Long range progs indicate that a shortwave will be moving into the High Plains toward Wed or Thur, and then into the Plains and Midwest. The ridge will weaken slightly as this passes. It is possible that upslope and deep shear may support supercells later this week in the High Plains from W TX to CO/WY. We will be watching this pattern evolve. MISCELLANEOUS: subVORTEX was badly battered, bruised, and burned yesterday as we chased a tornadic supercell across IA. When we closed in for the intercept, the storm dissipated.