Elpidio Oliva appeals the district court’s sua sponte dismissal of his action appealing the Secretary of Health and Human Services’ determination of his disability onset date. We reverse, although we do so with some reluctance in view of Oliva’s counsel’s dilatory conduct in this case.

Oliva filed this action in district court on October 7, 1986. On that date, the court issued a Procedural Order for Social Security Review Actions (“procedural order”), which required Oliva to file a motion for summary judgment within thirty days of service of the Secretary’s answer. On April 3, 1987, Oliva applied for relief from the procedural order, indicating additional causes of action and class action status would be alleged. On April 7, 1987, the court modified the procedural order as follows: “Plaintiffs shall have thirty (30) days to file a stipulation regarding an amended complaint.” Oliva filed an amended complaint on May 22, 1987. The Secretary filed an answer to the amended complaint on July 6, 1987. Over a year and a half later, when no action had been taken on Oliva’s case, the district court issued an order dismissing the action. The district court stated as its reason for dismissal that pursuant to local rules and order of the court, Oliva should have filed a motion for summary judgment by August 6, 1987, and that no action had been taken on the case since July 6, 1987.

The court filed ah order dismissing the action on February 27, 1989. Oliva filed a motion for relief from the order pursuant to Rule 60(b), Fed.R.Civ.P., which the court denied by order dated March 21, 1989. On that same date, the court entered a judgment of dismissal, “[i]n accordance with the Court Order filed February 27, 1989.” Oliva’s notice of appeal, filed within 60 days of the March 21 judgment, states he appeals “from the judgment of dismissal rendered by the Court on March 21, 1989.”

The Secretary argues that Oliva’s appeal is solely from the denial of Oliva’s Rule 60(b) motion, and not from the underlying dismissal. We disagree. Oliva filed a timely notice of appeal from the March 21 judgment, which is based on the February 27 order of dismissal. Therefore, our review is of the dismissal of the action, not of the decision on the 60(b) motion. Compare Floyd v. Laws, 929 F.2d 1390, 1400 (9th Cir.1991) (appeal of court’s denial of Rule 60(b) motion does not bring up the underlying judgment for review).

District courts have inherent power to control their dockets and may impose sanctions, including dismissal, in the exercise of that discretion. Hamilton Copper & Steel Corp. v. Primary Steel, Inc., 898 F.2d 1428, 1429 (9th Cir.1990) (citations omitted). Because dismissal is a harsh penalty, it should be imposed as a sanction only in extreme circumstances. Thompson v. Housing Authority, 782 F.2d 829, 831 *274 (9th Cir.), cert. denied, 479 U.S. 829 , 107 S.Ct. 112 , 93 L.Ed.2d 60 (1986). The district court’s sua sponte dismissal of this case for failure to prosecute is reviewed for abuse of discretion. Id. at 832.

Of the factors that our circuit has advised district courts to consider before resorting to the penalty of dismissal, see Thompson, 782 F.2d at 831 , Hamilton Copper & Steel Corp., 898 F.2d at 1430 , the two that are decisive in this case are the failure to consider less drastic alternatives and the lack of warning of imminent dismissal of the case. In cases involving sua sponte dismissal of an action, rather than dismissal following a noticed motion under Rule 41(b), Fed.R.Civ.P., there is a closer focus on these two considerations. See Hamilton Copper & Steel Corp., 898 F.2d 1428 ; see also Morris v. Morgan Stanley & Co., 942 F.2d 648, 652 (9th Cir.1991). Where, as here, the district court does not explicitly consider these factors, we independently review the record to determine whether the order of dismissal was an abuse of discretion. Malone v. United States Postal Serv., 833 F.2d 128, 130 (9th Cir.1987), cert. denied, 488 U.S. 819 , 109 S.Ct. 59 , 102 L.Ed.2d 37 (1988).

The record before us does not reveal that the district court considered sanctions less drastic than dismissal. A district court “abuses its discretion if it imposes a sanction of dismissal without first considering the impact of the sanction and the adequacy of less drastic sanctions.” United States v. National Medical Enterprises, Inc., 792 F.2d 906, 912 (9th Cir.1986) (as quoted in both Hamilton Copper & Steel Corp. and Malone). While explicit discussion of alternative sanctions is not always necessary, see Malone, 833 F.2d at 131-133 , this case does not present the egregious circumstances, or the court’s use of less drastic measures prior to dismissal, that obviate the need for explicit discussion of alternatives. Id.; see also Hamilton Copper & Steel Corp., 898 F.2d at 1430 (collecting cases).

The failure to consider “less drastic alternatives” is.compounded in this case by the lack of warning to Oliva’s counsel of the imminent dismissal of the case. The district judge has an obligation to warn the plaintiff that dismissal is imminent. Johnson v. United States Dept. of the Treasury, 939 F.2d 820, 825 (9th Cir.1991); Hamilton v. Neptune Orient Lines, Ltd., 811 F.2d 498, 500 (9th Cir.1987); Franklin v. Murphy, 745 F.2d 1221, 1232 (9th Cir.1984). Nothing in the record demonstrates that counsel was on notice that the case would be dismissed. “Failure to warn has frequently been a contributing factor in our decisions to reverse orders of dismissal.” Malone, 833 F.2d at 133 .

Here, the public’s interest in expeditious resolution of litigation, the court’s need to manage its docket, and the possible prejudice to the party suffering delay all support the district court’s order of dismissal. We do not condone the dilatory conduct of Oliva’s counsel. However, in the absence of indications that alternative sanctions were considered and of warning to counsel that dismissal was imminent, we cannot uphold the district court’s sua sponte dismissal of this case. See Johnson, 939 F.2d at 825 ; Hamilton Copper & Steel Corp., 898 F.2d at 1430-31 ; Thompson, 782 F.2d at 831-32 ; Franklin, 745 F.2d at 1232-34 ; see also Morris, 942 F.2d at 652 ; Malone, 833 F.2d at 131-133 ; Hamilton, 811 F.2d at 500 . Moreover, the public policy favoring disposition on the merits weighs against dismissal. Porter v. Martinez, 941 F.2d 732, 734 (9th Cir.1991); Malone, 833 F.2d at 130 .

REVERSED and REMANDED.