99 ACCORD STALLS WHEN ENGINE WARMS UP

1999 ACCORD LX 125K MILES STALLS WHILE DRIVING. I CAN IMMEDIATELY RESTART THE CAR AND CONTINUE DRIVING FOR A MINUTE OR SO BEFORE IT STALLS AGAIN. AFTER RESTARTING THE SECOND TIME, I CAN CONTINUE DRIVING WITHOUT ANY PROBLEMS. THIS HAS HAPPENED A DOZEN TIMES OR SO IN THE LAST MONTH. I HAVE NOTICED THAT THIS ONLY HAPPENS WHEN I START DRIVING ON A COLD ENGINE. THE FIRST STALL SEEMS TO HAPPEN AS THE TEMP GAUGE ALMOST REACHES NORMAL TEMP AND THE SECOND STALL AS IT REACHES NORMAL TEMP. IS THIS A BAD THERMOSTAT OR SOME KIND OF ELECTRICAL/ SENSOR PROBLEM? I RECIEVE NO CHECK ENGINE LIGHTS OR ANY OTHER WARNINGS PRIOR TO THE STALL.