GUY, Circuit Judge, delivered the opinion of the court, in which NORRIS, Circuit Judge, joined. MERRITT, Chief Judge (pp. 54-55), delivered a separate dissenting opinion.
RALPH B. GUY, JR., Circuit Judge.Defendant Tony Sonagere entered a conditional guilty plea to manufacturing marijuana and aiding and abetting in violation of 21 U.S.C. § 841(a)(1) and 18 U.S.C. § 2. He now appeals the district court’s antecedent denial of his motion to suppress evidence seized in a search of a warehouse that was leased to him. Defendant Gregory George entered a guilty plea to the same crimes, and now challenges his sentence on constitutional grounds. We find the defendants’ arguments to be without merit, and affirm.
I.
On August 3,1992, Detective Michael Stott of the Akron Police Department applied for a warrant to search a warehouse at 1140A2 Old South Main Street in Akron, Ohio. In his affidavit, Stott described a tip he had received from an unnamed informant:
Affiant states that the Information Source within the last ten days made the following observations about the inside of the above described location:
a. The Information Source observed two tables approximately 6 feet by 6 feet containing approximately 100 Marijuana plants per table. These plants were between 3 and 4 feet in height.
b. The Information Source observed 10 to 12 smaller tables, approximately 3 feet by 3 feet. These tables contained what appeared to be one Marijuana plant per table. These plants were 8 to 10 feet in height. These plants were tied at the top to the grow lights for support.
c. The Information Source observed large [fluorescent] growing lights over the tops of the tables and also a shelf containing several spray bottles of different colored liquids.
d. The Information Source observed an electrical control panel on the wall and several floor and exhaust fans.
e. The Information Source while making these observations saw an automatic sprinkler system placing a liquid mist over the Marijuana plants.
Elsewhere in the affidavit, Stott stated that another Akron police officer, one Harkness, *53had recently encountered two men “welding the hinges shut on the outside doors” to the warehouse. When Harkness approached these men, they appeared “extremely nervous.” Stott’s affidavit provided no other significant information relating to the warehouse.
On the basis of Stott’s affidavit, an Akron municipal court judge determined that probable cause existed to search the warehouse. The judge issued the search warrant on August 3 and it was executed later that day. The executing officers seized 219 marijuana plants and a large quantity of hydroponic growing equipment from the warehouse. The arrests of Sonagere and George were incident to this search. Subsequent investigation revealed that the warehouse was leased to Sonagere and that its utilities were in George’s name.
Defendants were later charged in state court, but those charges were dropped. A federal grand jury subsequently returned a one-count indictment that charged each defendant with manufacturing marijuana and aiding and abetting. George pled guilty, but Sonagere filed a motion to suppress the evidence seized in the search of the warehouse. The district court held a hearing and denied this motion. Sonagere then entered his conditional guilty plea, but preserved his right to appeal the denial of his motion. These appeals followed.
II.
Sonagere argues that the affidavit did not establish probable cause to search the warehouse. He further contends that the “good-faith” exception to the probable cause requirement (described in United States v. Leon, 468 U.S. 897, 104 S.Ct. 3405, 82 L.Ed.2d 677 (1984)) does not apply to the facts of his ease.
It is settled that a state magistrate’s determination of probable cause is entitled to “great deference.” United States v. Leake, 998 F.2d 1359, 1363 (6th Cir.1993) Our task on appeal is to determine whether, in light of the totality of the circumstances, the magistrate had a “substantial basis” for concluding that “a search would uncover evidence of wrongdoing[.]” Illinois v. Gates, 462 U.S. 213, 236, 103 S.Ct. 2317, 2331, 76 L.Ed.2d 527 (1983).
Two factors are often critical in determining whether a confidential informant’s tip provides such a “substantial basis.” First, an “explicit and detailed description of alleged wrongdoing, along with a statement that the event was observed firsthand, entitles [the informant’s] tip to greater weight than might otherwise be the case.” Id. at 234, 103 S.Ct. at 2330. Second, the extent to which the tip is corroborated by the officers’ own investigation is significant. Id. at 244, 103 S.Ct. at 2335.
In Leake, we considered these factors in the course of determining whether an anonymous informant’s tip established probable cause for the search of a certain house. The informant there merely reported that he had smelled marijuana in, and seen marijuana “stacked in the basement” of, the house. 998 F.2d at 1361. The police placed the house under surveillance after receiving the tip, but observed “nothing unusual.” Id. We held that the affidavit that was based upon this tip did not establish probable cause for two reasons: First, the tip “was not ‘rich’ in relevant detail[,]” and second, the officers’ surveillance of the house did not yield any corroboration of the tip. Id.
Sonagere asserts that Leake is controlling here, but we disagree. First, unlike the tip in Leake, the tip here was extremely rich in relevant detail. The informant described the size and number of the marijuana plants in the building; the size, number, and shape of the tables upon which they rested; the manner in which the plants were supported; the lighting, ventilation, and watering systems used to grow the plants; and the presence of collateral items. This is a far cry from reporting that marijuana was “stacked in the basement.”
Second, Officer Harkness’ encounter with the two men outside the warehouse corroborated the tip to some extent. Like the “somewhat unusual travel plans” of the defendants in Gates, 462 U.S. at 246 n. 14, 103 S.Ct. at 2336 n. 14, the welding of the door hinges and the extreme nervousness of the men was unusual activity that suggested the existence of a criminal enterprise.
*54Sonagere stresses that the informant had never before provided the police with information. Given the other strengths of the affidavit, however, this fact does not overly concern us, since the anonymous informant in Gates likewise had no history of reliability. We also note that the affidavit in no way misrepresented the informant’s history.
Sonagere also points out that the affidavit did not explain how the informant was able to enter the warehouse or how he was able to distinguish marijuana plants from other plants. We do not think the affidavit is undermined by these facts; the informant in Gates gave no hint of how he was able to observe or identify the drugs he said were kept in the Gates’ basement, and the Supreme Court did not seem troubled by that fact.
We therefore conclude that the Akron municipal judge had a “substantial basis” for determining that Stott’s affidavit established probable cause to search the warehouse. Since we so conclude, we need not address Sonagere’s argument concerning the applicability of the Leon good-faith exception.
III.
George asserts that his sentence was determined according to an unconstitutional provision of the Sentencing Guidelines. That provision is U.S.S.G. § 2Dl.l(c*), which provides in relevant part:
In the case of an offense involving marihuana plants, if the offense involved (A) 50 or more marihuana plants, treat each plant as equivalent to 1 KG of marihuana; (B) fewer then 50 marihuana plants, treat each plant as equivalent to 100 G of marihuana. Provided, however, that if the actual weight of the marihuana is greater, use the actual weight of the marihuana.
Under this scheme, George was held responsible for the manufacture of 219 kilograms of marijuana. George argues that section 2Dl.l(c*) is “irrational” and violates his right to “substantive due process.”
We expressly rejected this precise argument in United States v. Holmes, 961 F.2d 599, 601-03 (6th Cm.), cert. denied, — U.S. -, 113 S.Ct. 232, 121 L.Ed.2d 168 (1992). Since we cannot overrule the published decision of another panel, Salmi v. Secretary of HHS, 774 F.2d 685, 689 (6th Cir.1985), we must reject George’s argument as well.
AFFIRMED.