OPINION
This Court granted review to determine whether Article I, Section 8, of the Pennsylvania Constitution categorically proscribes the issuance of what is commonly referred to as an “anticipatory search warrant,”
i.e.,
“ ‘a warrant based upon an affidavit showing probable cause that at some future time (but not presently) certain evidence of crime will be located at a specified place.’ ”
Commonwealth v. Glass,
The anticipatory search warrant at issue here was based upon an affidavit of probable cause prepared by Trooper Brian J. Merritt of the Pennsylvania State Police Tactical Narcotics Team. The affidavit related that, on May 2, 1996, while executing a search warrant at a residence in Dauphin County, Trooper Merritt found a large quantity of controlled substances, as well as various receipts, paraphernalia, and records chronicling drug trafficking activity. The documentation revealed the location where controlled substances were being distributed, the quantity, and the amount of money related to the distribution. At this residence, Trooper Merritt also encountered a person identified in the affidavit only as “C.I. [confidential informant] # 1,” who was later identified at the suppression hearing as Richard David Osborne. 1 Osborne decided to cooperate with the police. As part of his cooperation, Osborne explained that, on April 29, 1996, he had delivered four (4) pounds of marijuana to appellant, Michael Glass, at a price of $1,500 per pound. Appellant still owed Osborne $6,000 for the marijuana.
Five days later, on May 7, 1996, Trooper Merritt was at Osborne’s residence when Osborne received a telephone call from appellant, who stated that he was prepared to pay Osborne the $6,000 and wanted Osborne to come to his residence to collect the money. Troоper Merritt and two other troopers searched Osborne and his vehicle. Finding no cash or drugs, the troopers then followed Osborne to appellant’s residence and watched him enter the residence. Approximately one hour later, Osborne met the troopers at a predetermined location and Osborne handed the troopers $6,000 in cash that appellant had paid him. Osborne relayed to the troopers that appellant stated that he wished to purchase as much additional marijuana as Osborne could secure, *190 and that the marijuana should be delivered to appellant’s residence on May 9th. Osborne also informed the troopers that he had been supplying appellant with marijuana for approximately four months, always delivering it to appellant at appellant’s residence.
Trooper Merritt also related that members of the Pennsylvania State Police Strike Force and members of the Attorney General’s Bureau of Narcotics Investigations informed him that they were familiar with appellant and knew that he was involved in drug trafficking. A criminal history check of appellant revealed that appellant had a previous arrest for possession with intent to deliver a controlled substance.
Trooper Merritt further noted in the affidavit that he had secured a large quantity of marijuana through state police sources and had made arrangements with Osborne to deliver the marijuana to appellant on May 9, 1996 — the same day on which he was seeking the search warrant. The trooper concluded the affidavit by noting that he was requesting an anticipatory search warrant to be served and executed upon delivery of the marijuana by Osborne to appellant at appellant’s residence, and that the request was being made in order to keep appellant from using or distributing the drugs that were to be delivered. A district justice authorized the warrant on May 9, 1996, at 3:15 р.m., with the directive that it be served as soon as practicable but no later than within the next two following days.
At the suppression hearing, Trooper Merritt testified that he and Osborne proceeded with the controlled 1 delivery on May 9, 1996. Trooper Merritt gave Osborne a quantity of marijuana and an alert pager, a device similar to other pagers but which sends out a radio signal when activated, and instructed Osborne to activate the pager as soon as he delivered the marijuana. Osborne entered appellant’s residence with the marijuana and, approximately five minutes later, Trooper Merritt’s alert pager sounded. After trоopers met with Osborne at a pre-determined location, they searched him and his vehicle, and finding no marijuana, proceeded to execute the search warrant at appellant’s residence.
*191 By the time the troopers entered the house, appellant was already in the kitchen re-packaging the marijuana. In all, the troopers seized approximately twelve (12) pounds of marijuana, including a small amount of marijuana found on appellant’s person; a Harley-Davidson motorcycle; two trucks; $13,840 in cash; approximately 70 firearms; more than two dozen individual knives; and 60 knives in a canvas wrap.
Prior to trial, appellant filed a motion to suppress the evidence seized from his residence based upon a broad claim that anticipatory search warrants violate Article I, § 8, of the Pennsylvania Constitution. The suppression court denied the motion. Following a jury trial, appellant was convicted of possession of a controlled substance and possession with intent to deliver a controlled substance, as well as possession of drag paraphernalia.
On appeal to the Superior Court, appellant raised three issues: (1) that anticipatory search warrants, such as that issued here,
per se
violate Article I, § 8, of the Pennsylvania Constitution; (2) that the warrant was wrongly issued because the affidavit of probable cause was defective; and (3) that the warrant was issued in violation of the Pennsylvania Rules of Criminal Procedure. The Superior Court found that appellant waived the latter two issues, since they were not presented to the suppression court, and rejected on the merits his broad state constitutional challenge to anticipatory search warrants.
Glass,
We granted appellant’s Petition for Allowance of Appeal, limited to his single, non-waived claim that Article I, § 8, of the Pennsylvania Constitution categorically proscribes the issuance of anticipatory search warrants. 2
Our review of suppression court rulings is circumscribed. Where the record supports the suppression court’s
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factual findings, we may reverse only if the legal conclusions drawn from these facts are in error.
Commonwealth v. Cleckley,
This Court has yet to squarely address the constitutionality of anticipatory search warrants under either the Fourth Amendment or under Article I, § 8. Nor has the United States Supreme Court addressed the constitutionality of the practice. Nevertheless, we hardly write upon a blank slate, as the question of thе propriety of anticipatory search warrants has been addressed by all of the United States Courts of Appeals save for the District of Columbia, many of our sister states, and the lower Pennsylvania courts. The overwhelming majority of courts that have considered the practice have concluded that such warrants pass constitutional muster. This includes every federal court of appeals, 3 as well as state courts approving the warrants under the Fourth Amendment and under their state constitutional equivalents of the Fourth Amendment. 4
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In addition, this Court approved of what was, at least in part, arguably an anticipatory search warrant in
Commonwealth v. Baker,
We note further that legal scholars are in accord with the courts in approving properly drafted anticipatory search warrants.
See generally
LaFave,
supra &
n. 88 (citing sources);
see also
James A. Adams,
Anticipatory Search Warrants: Constitutionality, Requirements, and Scope,
79 Ky. L.J. 681 (1990-91) (hereinafter Adams,
Anticipatory Search Warrants
). To Professor LaFave, approval of anticipatory search warrants is the “better view.” “As one court put it: ‘The probable cause doctrine does not require that the contraband to be seized must presently be located at the premises to be searched, only that there is probable cause to believe ... that evidence [of crime] can likely be found at the described locus at the time of the search.’ ” LaFave,
supra
at 364,
citing U.S. v. Ricciardelli,
Approving this procedure encourages police to seek warrants, thereby ensuring independent pre-search review by a neutral magistrate, while at the same time providing police with the ability to respond quickly to ongoing criminality.
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The flexibility afforded police in turn helps law enforcement “in complying with the edicts that the courts themselves have issued.”
Id.
at 365,
quoting Alvidres v. Superior Court,
Finally, LaFave accurately notes that, although the United States Supreme Court “has not yet had occasion to consider this precise type of anticipatory search warrant,” it has in other cases “indicated that it was constitutionally proper to obtain a search warrant for the seizure of oral communications through the use of electronic surveillance.” LaFave,
supra
at 365,
citing Katz v. United States,
Of course, in evaluating anticipatory search warrants under Pennsylvania’s search and seizure jurisprudence, we are not bound to follow the opinions of scholars and other commentators any more than we are bound by the near-unanimous view of the other courts that have considered the question. Nor are we bound by
Baker
or
Brion,
since the issues in those cases did not concern the specific state constitutional challenge now made by appellant. On the other hand, where the weight
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of authority falls so heavily on one side of the equation, a proper respect for the experience and opinion of others who have grappled with the issue counsels that we view somewhat skeptically an argument, such as that proposed by appellant here, that demands the contrary result. In addition, we note that the fact that this Court has “accorded greater protections to the citizens of this state under Article I, § 8 of our constitution under certain circumstances,”
Cleckley, 558
Pa. at 525,
With this background in mind, we turn to appellant’s specific challenge. Employing the four-part methodology to aid in evaluating state constitutional claims established in Edmunds, 8 appellant claims that anticipatory search warrants run afoul of Article I, § 8, on the asserted ground that this provision requires that probable cause exist when the warrant is issued, and not at some time in the future. In appellant’s view, anticipatory search warrants violate that requirement because probable cause in those cases arises only after the future event occurs — i.e., as here, where the controlled delivery of the drugs to appellant’s residence occurs. When the *197 occurrence of a future event is necessary to the finding of probable cause, appellant urges that no warrant may issue, no matter how certain it is that that future event will occur. Put another way, under appellant’s reading of Article I, § 8, probаble cause to search a place for contraband or other evidence of a crime cannot exist unless there is reason to believe that, at the time the warrant is issued, the evidence is then in the place to be searched. 9
Preliminarily, we note that it is difficult to see why the result of a probable cause inquiry such as this should be any
different
under our governmental charter than under the Fourth Amendment. The standard for evaluating whether probable cause exists for the issuance of a search warrant is the same under both the Fourth Amendment and Article I, § 8: the “totality of the circumstances” test set forth in
Illinois v. Gates,
The task of the issuing magistrate is simply to make a practical, common-sense decision whether, given all the circumstances set forth in the affidavit before him, including the “veracity” and “basis of knowledge” of persons supplying hearsay information, there is a fair probability that *198 contraband or evidence of a crime will be found in a particular place. And the duty of a reviewing court is simply to ensure that the magistrate had a “substantial basis ... for concluding] that probable cause existed.”
Gray,
We begin our state constitutional analysis by noting that there is nothing in the text of Article I, § 8, or in the Fourth Amendment for that matter, to support appellant’s argument that the probable cause standard requires a showing that the evidence must be in the place to be searched at the time the warrant issues. The text states only that “no warrant to search any place shall issue ... without probable cause.” Pa. Const. Art. I, § 8. The provision does not speak to whether a finding of probable cause can or cannot be based upon the anticipation of a future event.
Nor does “the history of our case law” under Article I, § 8, the seсond prong under
Edmunds, see Commonwealth v. Cass,
What remains under Edmunds is consideration of related case law from other jurisdictions and policy considerations unique to this Commonwealth. As we have already noted, the overwhelming weight of authority from other jurisdictions, including every federal Circuit Court to decide the issue, approves the use of anticipatory warrants. A consideration of the reasons for that approval, as well as a consideration of relevant policy concerns inherent in the probable cause analysis, leaves us with no doubt that there is nothing unconstitutional in the use of anticipatory warrants.
Anticipatory search warrants pose no threat to settled views of probable cause. The very nature of a search warrant is in a sense “anticipatory.” Time being a continuum, the analysis cannot be otherwise. Warrants authorize future searches, not searches into the past. There is always a lag between the underlying observation, the representations of the affiant, the issuance of the warrant, and its ultimate execution. Presented with a series of factual averments, the magistrate must deter
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mine, or anticipate, whether there is a fair probability that evidence of a crime “will be found” in a particular place when the warrant is executed. Although probable cause unquestionably must exist at the time the warrant is authorized,
see, e.g., Commonwealth v. Tolbert,
This is so with all warrants, “anticipatory” or not. For example, a warrant premised entirely upon past observations of contraband or other evidénce of a crime in a place— appellant’s probable cause paradigm — may properly issue only if the magistrate can determine that there is a reasonable probability that the future will hold what the pаst promised. The past observations do not conclusively establish that the contraband will still be at the location by the time the warrant is drafted and approved, much less by the even later time that the warrant is to be executed. Drugs, for example, can quickly be sold, consumed, or destroyed in the time it takes to get a warrant. What the past observations do is provide a basis for an expectation or an anticipation that the contraband will still be at the location in question by the time a warrant is secured and executed.
See United States v. Garcia,
This focus upon what there is a fair probability to believe “will be found,” as opposed to what merely
was
present in the
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past, is unavoidable, for the intrusion on privacy authorized by the warrant will of necessity occur upon future execution. Indeed, that is why there is a proscription against staleness in a probable cause analysis.
See Tolbert,
The question then is, in making the assessment whether contraband or evidence of a crime will be found at the particular place that is to be searched, may the magistrate consider, as a valid source for probable cause, information concerning a future event — such as here where the police have arranged a controlled delivery of marijuana in response to appellant’s request to buy marijuana from the informant. We see no reason in law, logic, or human experience why not.
Probable cause is a “practical, nontechnical conception:” it “is a fluid concept — turning on the assessment of probabilities in particular factual contexts not readily, or even usefully, reduced to a neat set of legal rules.”
Gates,
Contrary to appellant’s argument, recognizing the constitutional propriety and relevance of reasonably likely future events in the analysis of probable cause does not alter or diminish the requirement that the magistrate determine that probable cause exist at the time the warrant is executed. Appеllant’s argument in this regard confuses the question of what may be considered in assessing probable cause with *203 when the probable cause determination must be made. To borrow the Commonwealth’s example, we have (more than) probable cause today to believe that the sun will rise tomorrow, even though that distinctly future event, tomorrow, is not yet here. Similarly, a magistrate considering an anticipatory warrant is assessing whether there is then probable cause to believe that evidence will be found when the warrant is to be executed. Our analysis simply recognizes that, in making the practical determination of what amounts to probable cause, the magistrate may consider likely future events, subject to the sorts of specificity and reliability strictures attending all probable cause evaluations. 13
As in Cleckley, we find no policy issues unique to Pennsylvania jurisprudence that would require us to accept appellant’s contrary position. Nothing in a prospective or “anticipatory” warrant poses any more threat to the warrant and probable cause requirements of the Pennsylvania Constitution than the “conventional” warrant appellant prefers. To the contrary, the warrant furthers the concern for privacy which those provisions protect. This is not only because the future-oriented information is often more reliable — such as here, wherе it involves the certain delivery of contraband within the control of the police — but also because anticipatory warrants interpose the review of a neutral magistrate before the intrusion will occur — a practice we have consistently encouraged.
Anticipatory warrants have the added virtue of providing law enforcement with the flexibility needed to effectively protect the citizenry so that all Pennsylvanians may lead quieter, safer, private lives. Absent the anticipatory warrant tool, police, with probable cause to believe that drugs will be delivered to a location, must wait until after the delivery to take any action. At that point, police are forced to choose *204 between attempting to obtain a search warrant, or conducting a warrantless entry and search immediately after the delivery in the belief that sufficient exigent circumstances exist to justify that action. The former course risks distribution or destruction of the contraband, while the latter runs the risk of suppression if the courts disagree with the on-the-spot police assessment of probable cause and exigency. Authorizing anticipatory warrants resolves this real-world dilemma in a fashion that far better serves Article I, § 8’s concerns with privacy and the warrant requirement.
Our conclusion that anticipatory warrants are not categorically prohibited by Article I, § 8, answers the question before us for review. Whether a particular anticipatory warrant should or should not be approved, of course, will depend upon the sufficiency of the averments in the individual ease. As we have noted above, no such challenge is properly before us here. Accordingly, we affirm the order of the Superior Court.
Notes
. For ease of exposition, we will refer to C.I. # 1 as Osborne.
. Notwithstanding the limited nature of our allocatur grant, appellant attempts to renew his waived claims that the warrant was defective and was issued in violation of the Rules of Criminal Procedure. In addition, he attempts to resurrect the claims by arguing that his trial counsel was ineffective. None of these claims were the subject of our grant of review; accordingly, they will not be considered.
Common
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wealth v. Davis,
.
See, e.g., United States v. Loy,
.
See Commonwealth v. Coleman,
. "T.H.C.” is the abbreviation for Tetrahydrocannbinol, the active ingredient in hashish and marijuana.
.
See, e.g., Commonwealth v. Labron,
. In many instances, we have found that the prеvailing Fourth Amendment view was sufficient to satisfy Article I, § 8. See, e.g.,
Cleckley,
. Under
Edmunds,
the court should consider: the text of the Pennsylvania constitutional provision; the history of the provision, including Pennsylvania case law; related case law from other states; and policy considerations unique to Pennsylvania.
. Nоtwithstanding that neither this Court nor the United States Supreme Court has yet to specifically rule on anticipatory warrants under the Fourth Amendment, appellant did not attempt to preserve a Fourth Amendment claim, nor does he take issue with the prevailing Fourth Amendment view. Instead, appellant distinguishes the Fourth Amendment cases with the mere notation that they were not decided under the Pennsylvania Constitution. He thus bottoms his argument entirely upon a belief that there is something unique in the Article I, § 8 probable cause requirement that dictates disapproval of anticipatory search warrants.
. Although O.A. was a plurality opinion, the dissenting opinion, which expressed thе views of three additional Justices, agreed that the test for probable cause was the same under Article I, § 8, as under the Fourth Amendment.
. In the
Edmunds
line, we have noted that, given the textual similarity between Article I, § 8, and the Fourth Amendment, our finding of a privacy-based, broader state constitutional right was derived from the case law interpreting the history of the Pennsylvania provision and not upon any textual command.
Cass,
. This point is further explained by Professor LaFave:
"At best, present possession is only probative of the likelihood of future possession. In cases [involving anticipatory warrants] the certainty of future possession is greater or is often greater than that based on information of past and presumably current possession____ [I]n many kinds of organized crime the evidence supplied to obtain warrants does not relate to current crimes but past crimes with circumstances showing the likelihood of continuance of the same activity. In the present cases the evidence that there would be а consummated prospective crime was logically and probatively stronger. The necessary pieces were in motion and all but inevitably the pieces would fall into a set, at a later time, constituting the crime.”
LaFave,
supra
at 366,
quoting Glen,
.
See
Adams,
Anticipatory Search Warrants,
